Abstract

A multi-phase switched capacitor converter is disclosed for converting a first voltage into a second voltage, or vice versa. The converter includes two sub-converters connected in parallel between an input voltage and an output voltage. Each sub-converter comprises a flying capacitor and a plurality of switches. Power conversion is performed by periodically switching the electrical connection between the flying capacitor and the voltage sources, between a first switching phase and a second switching phase. The two sub-converters alternately switch between a first system state and a second system state in a periodic manner. During the transition between the first and second system states, an overlapping system state is inserted, wherein both sub-converters are simultaneously in the first switching phase, thereby ensuring continuous current flow and reducing voltage spikes.

IPC Classes  ?

• H02M 3/07 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode
• H02M 1/00 - Details of apparatus for conversion

Abstract

The present invention relates to a switched-capacitor converter comprising N flying capacitors (where N ≥ 1) and a plurality of switches configured to perform periodic switching between a plurality of switching phases to convert a first voltage into a second voltage, or vice versa. Upon entering one of the switching phases, referred to as the first switching phase, the first terminal of at least one of the N flying capacitors is switched earlier than its second terminal to electrically connect to a corresponding node in the first switching phase, thereby forming a required coupling relation for the phase. This configuration allows the second terminal to gradually approach a zero-voltage switching (ZVS) before being subsequently switched, which enables the corresponding switch to operate under ZVS condition. As a result, switching loss is reduced and power conversion efficiency is improved.

IPC Classes  ?

• H02M 1/08 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
• H02M 3/07 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode

Abstract

A power conversion circuit includes a transformer, a switching transistor, an auxiliary transistor, and a control circuit. The transformer includes a primary coil, a secondary coil, and an auxiliary coil. The primary coil receives an input voltage, and the secondary coil generates an output voltage. The switching transistor is coupled between the primary coil and a ground. The auxiliary transistor is coupled between a terminal of the auxiliary coil and the ground. The control circuit drives the switching transistor based on the output voltage. When the transformer ends the demagnetization, the control circuit turns on the auxiliary transistor in a zero-voltage switching period, so that the switching transistor achieves zero-voltage switching when the switching transistor is turned on once again.

IPC Classes  ?

• H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
• H02M 1/00 - Details of apparatus for conversion

Abstract

A power conversion circuit includes an isolated power converter, an isolation device, a primary control circuit, and a secondary control circuit. The isolated power converter includes a transformer. The transformer includes a primary coil and a secondary coil, and the secondary coil generates an output voltage. The isolation device generates a feedback signal based on a feedback current. The primary control circuit magnetizes and demagnetizes the primary coil based on the feedback signal. The secondary control circuit generates the feedback current based on the output voltage. When the power conversion circuit operates in a programming mode, the secondary control circuit provides a program code to the primary control circuit through the isolation device.

IPC Classes  ?

• H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
• H02M 1/42 - Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
• H02M 7/217 - Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

A power conversion circuit includes: a path switch for controlling a conduction path of a supply voltage to a bus voltage; a first current sensing circuit for generating a current sensing voltage according to a current supplied to a load; a second current sensing circuit including the path switch or a conductive trace segment, configured to generate a determination voltage according to the current; and a power control circuit for performing a limit power source (LPS) control procedure according to the current sensing and the determination voltage. The LPS control procedure includes: a determination step for determining whether the current sensing voltage is lower than a sensing threshold and whether an absolute value of the determination voltage is higher than an absolute value of a determination threshold; and an LPS operation for limiting an output power related to the current. When determination result is affirmative, the LPS operation is performed.

IPC Classes  ?

• H02M 1/00 - Details of apparatus for conversion
• H02M 1/08 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
• H02M 1/32 - Means for protecting converters other than by automatic disconnection

Abstract

A bandgap reference circuit includes: first and second bipolar junction transistors (BJT) biased at first and second current densities respectively, such that the base-emitter voltages of the first and second BJTs have a base-emitter voltage difference. The first BJT is configured to determine a negative temperature coefficient (CTAT) signal. A differential sensing resistor is series-coupled between ground potential and the second BJT to form a sub-branch, with the differential sensing resistor located closer to the ground potential side. A feedback circuit is configured to control the sub-branch and the first BJT to have the same voltage drop, such that the voltage drop across the differential sensing resistor includes the base-emitter voltage difference, thereby determining a positive temperature coefficient (PTAT) signal. The feedback circuit further generates a reference voltage with a zero temperature coefficient based on the PTAT signal and the CTAT signal.

IPC Classes  ?

• G05F 3/26 - Current mirrors

Abstract

A multi-phase power converter includes: a plurality of power stage circuits, configured to convert an input voltage to an output voltage, wherein the plurality of power stage circuits are coupled to the input voltage, each power stage circuit including at least one switch controlling a corresponding inductor, wherein the inductor deliver energy to the output voltage; a current sensing circuit coupled to the plurality of power stage circuits and configured to sense an inductor current flowing through each inductor of the corresponding power stage circuit; and a control circuit comprising an instantaneous current response module configured to trigger an instantaneous current response to increase or decrease a number of operating phases of the plurality of power stage circuits when at least one of the inductor currents exceeds an instantaneous current threshold, thereby suppressing an overshoot or an undershoot of the output voltage.

IPC Classes  ?

• H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load

Abstract

The present invention provides a vertical junction field-effect transistor (JFET) and manufacturing method thereof. The vertical JFET includes an N+ type substrate, an N type bulk region, an N type drift region, two P type buried regions, two P type base regions, two P+ type gate regions, and an N+ type source region. A vertical channel is formed between the N+ type source region and the N+ type substrate, allowing conduction of current exclusively in the vertical direction. The continuous P type regions formed by the P type buried and base regions improve the JFET's conductive resistance, breakdown voltage, and leakage current characteristics.

IPC Classes  ?

• H10D 30/83 - FETs having PN junction gate electrodes
• H10D 30/01 - Manufacture or treatment

Abstract

A power conversion circuit includes a transformer, a resonant capacitor, a high-side transistor, a low-side transistor, an auxiliary capacitor, an auxiliary switch, and a control circuit. The transformer includes a primary coil and a secondary coil. The primary coil is coupled between a switch node and a resonant node. The resonant capacitor is coupled between the resonant node and a ground. The high-side transistor provides an input voltage to the switch node, and the low-side transistor couples the switch node to the ground. The auxiliary capacitor is coupled to the resonant node. The auxiliary switch is coupled between the auxiliary capacitor and the ground. The control circuit drives the high-side transistor and the low-side transistor, and turns on the auxiliary switch based on a current flowing through the resonant capacitor, so that the auxiliary capacitor is coupled in parallel with the resonant capacitor.

IPC Classes  ?

• H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
• H02M 1/00 - Details of apparatus for conversion
• H02M 1/38 - Means for preventing simultaneous conduction of switches
• H02M 3/338 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in a self-oscillating arrangement

Abstract

A hybrid amplifier includes: a first to fourth PWM circuit, comparing triangular wave signals and filter signals to generate PWM signals; a first processing circuit, generating pulse-width processed signals based on the PWM signals and the polarity of input signals; a judgment circuit, generating a selection signal based on the level of a differential input signal; a selection circuit, generating switching control signals according to the selection signal and the pulse-width processed signals; and a first and second power stage generating switching voltages based on the switching control signals to switch an inductor to generate output signals. When outside the light-load range, the first switching signal controls the switching voltage to toggle between a higher voltage level and ground, while the second switching signal approximates the fundamental frequency. When within the light-load range, the switching control signals control the switching voltage to toggle between a lower voltage level and ground.

IPC Classes  ?

• H03F 1/32 - Modifications of amplifiers to reduce non-linear distortion
• H03F 1/26 - Modifications of amplifiers to reduce influence of noise generated by amplifying elements

Abstract

A method for detecting abnormalities of a motor includes generating, by a microcontroller, a quadrature current, calculating, using a low-pass filter, an average current based on the quadrature current, generating, by the microcontroller, a ripple current, comparing the ripple current with the average current, determining whether the ripple current deviates from the average current by more than a predetermined threshold for a specified duration, and triggering an alert signal when the ripple current deviates from the average current by more than the predetermined threshold for the specified duration.

IPC Classes  ?

• G01R 31/34 - Testing dynamo-electric machines
• G01R 19/165 - Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
• H02P 21/10 - Direct field-oriented controlRotor flux feed-back control
• H02P 21/18 - Estimation of position or speed
• H02P 21/22 - Current control, e.g. using a current control loop

Abstract

A method for controlling a power conversion system is provided. The method includes operating a charge quantity regulation circuit in a charging mode to convert output power into temporary storage power stored in a storage capacitor. An input current of an input power is sensed by a current control circuit. When the input current reaches a predetermined current threshold, the charge quantity regulation circuit enters a discharging mode, and a current limit circuit simultaneously enters a current clamping state. During the discharging mode, the output voltage is regulated to a target level lower than the input voltage. While operating in the discharging mode, the current limit circuit clamps the input current not to exceed an input current limit.

IPC Classes  ?

• H02M 1/00 - Details of apparatus for conversion
• H02M 1/32 - Means for protecting converters other than by automatic disconnection
• H02M 3/157 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators with digital control
• H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load

Abstract

A hybrid differential amplifier generating a differential output signal based on a differential input signal having a fundamental frequency includes: a first amplifier configured as an inductive switching converter; and a second amplifier configured as another type of amplifier. The first and second amplifiers respectively generate first and second output signals of the differential output signal based on first and second input signals of the differential input signal. One of the first or second amplifiers further generates the first or second output signal based on feedback, thereby the differential output signal is linearly related to the differential input signal. The other amplifier performs a quantization processing on the first or second input signal, thereby the second output signal includes a staircase wave related to the fundamental frequency. The quantization processing includes generating a quantized output signal based on the first or second input signal and at least one threshold level.

IPC Classes  ?

• H03F 3/45 - Differential amplifiers
• H03F 1/08 - Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements

Abstract

A power conversion circuit for converting an input voltage to an output voltage includes a resonant capacitor, a transformer, a high-side transistor, a low-side transistor, and a control circuit. The resonant capacitor is coupled between a resonant node and a ground, and a resonant voltage is generated at the resonant node. The transformer includes a primary coil coupled between a switch node and a resonant node and a secondary coil. The high-side transistor provides the input voltage to the switch node, and the low-side transistor couples the switch node to the ground. When the high-side transistor and the low-side transistor are both turned off, the control circuit first determines that the resonant voltage is less than a predetermined threshold and then drives the high-side transistor and the low-side transistor.

IPC Classes  ?

• H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
• H02M 3/00 - Conversion of DC power input into DC power output

Abstract

A hybrid switching converter with a single inductor and multiple outputs is disclosed for converting an input voltage to a first output voltage and a second output voltage. The hybrid switching converter includes a sub-switching converter configured to convert the input voltage to an intermediate voltage, and first and second output switches configured to respectively convert the intermediate voltage to the first and second output voltages. An inductor has one terminal coupled to a switched-capacitor voltage dividing circuit and another terminal coupled to a second voltage. Under different configurations, the inductor is coupled to either a negative terminal or a positive terminal of a first capacitor, thereby converting the first voltage to either half the first voltage and a reference potential, or the first voltage and half the first voltage. The first voltage and the second voltage respectively correspond to one of the input voltage and the intermediate voltage.

IPC Classes  ?

• H02M 1/00 - Details of apparatus for conversion
• H02M 3/07 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode
• H02M 3/156 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators

Abstract

A control circuit is configured to control a switching converter based on a pulse-width modulation (PWM) signal. The switching converter includes a first and a second transistor coupled to a switching node for switching an inductor according to the PWM signal to convert an input voltage into an output voltage. The control circuit includes: a driver circuit for generating a switching drive signal to switch the first transistor based on the PWM signal and a switching signal at the switching node; and an amplifier circuit for amplifying a difference between the switching signal and a reference signal to generate an amplified output signal during a dead time for controlling the first transistor through a linear negative feedback operation to regulate the switching signal to be not lower than a predetermined negative voltage, thereby preventing forward conduction of a body diode of the first transistor or reducing the reverse recovery charge.

IPC Classes  ?

• H02M 1/00 - Details of apparatus for conversion
• H02M 1/088 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
• H03G 1/00 - Details of arrangements for controlling amplification
• H03G 3/30 - Automatic control in amplifiers having semiconductor devices

Abstract

A resonant power conversion circuit includes a resonant capacitor, a transformer, a high-side transistor, a low-side transistor, and a control circuit. The resonant capacitor is coupled between a resonant node and the ground. The transformer includes a primary coil coupled between a switch node and the resonant node. The high-side transistor provides an input voltage to the switch node. The low-side transistor couples the switch node to the ground. When the control circuit determines that the frequency driving the high-side transistor and the low-side transistor is in a frequency range, the control circuit turns off both the high-side transistor and the low-side transistor for a delay time to shift the driving frequency outside the frequency range.

IPC Classes  ?

• H02M 3/00 - Conversion of DC power input into DC power output
• H02M 1/00 - Details of apparatus for conversion
• H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

A buck converter includes a power stage, a feedback network coupled to the power stage, a control loop, a logic circuit coupled to the control loop, a driver circuit coupled between the logic circuit and the power stage, and a bypass detector. The feedback network is used to generate a feedback voltage according to the output voltage. The control loop includes an error amplifier (EA) for generating an EA voltage and a comparator (CMP) for generating a CMP signal. The logic circuit is used to generate a logic control signal for implementing a control scheme according to a set of control signals. The driver circuit is used to drive the power stage according to the logic control signal. The bypass detector is used to compare the input voltage with a predetermined threshold related to the output voltage and generate a bypass mode signal accordingly.

IPC Classes  ?

• H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
• H02M 1/00 - Details of apparatus for conversion
• H02M 1/32 - Means for protecting converters other than by automatic disconnection

Abstract

A hybrid differential amplifier that generates a differential output signal based on a differential input signal to drive a load, includes: a first amplifier configured as an inductive switching converter to perform pulse-width modulation (PWM) conversion based on a first input signal of the differential input signal to switch an inductor and generate a first output signal of the differential output signal; and a second amplifier configured to generate a second output signal of the differential output signal based on a second input signal of the differential input signal. The second amplifier is configured as a different type of amplifier distinct from the inductive switching converter. The second amplifier further generates the second output signal based on feedback from the differential output signal, thereby the differential output signal being linearly correlated with the differential input signal.

IPC Classes  ?

• H03F 3/45 - Differential amplifiers
• H03F 1/08 - Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements

Abstract

A power conversion circuit includes a transformer, a resonant capacitor, a high-side transistor, a low-side transistor, and a control circuit. The transformer includes a primary coil, coupled between a switch node and a resonant node, and a secondary coil. The resonant capacitor is coupled between the resonant node and the ground. The resonant capacitor generates a resonant voltage. The high-side transistor provides an input voltage to the switch node based on a high-side driving signal. The low-side transistor couples the switch node to the ground based on the low-side driving signal. The control circuit generates the high-side driving signal and the low-side driving signal. When the control circuit executes a start-up process, the control circuit discharges the resonant capacitor based on the relationship between the resonant voltage and the output voltage.

IPC Classes  ?

• H02M 3/00 - Conversion of DC power input into DC power output
• H02M 1/00 - Details of apparatus for conversion
• H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

The present invention discloses a hybrid switching converter with a single inductor and multiple outputs and a control method thereof, configured to convert an input voltage to a first and a second output voltages. The hybrid switching converter includes: a sub-switching converter, which converts the input voltage to an intermediate voltage; a first and a second output switches, which conduct the intermediate voltage during a first and a second inductance periods, respectively, to generate the first and second output voltages. The sub-switching converter comprises: a switched capacitor voltage divider circuit, which controls multiple switches through pulse-width modulation (PWM) signals to generate two divided voltage levels in each inductance cycle for supplying an inductor therein; and a control circuit, which generates PWM signals to control the multiple switches and the output switches in a time-division manner, and regulates the output voltages to target values according to output voltage feedback signals.

IPC Classes  ?

• H02M 3/07 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode
• H02M 1/00 - Details of apparatus for conversion
• H02M 3/157 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators with digital control
• H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load

Abstract

The present invention provides an integrated circuit package capable of independently assembling passive devices and a manufacturing method thereof. The integrated circuit package includes: an integrated circuit configured to be mounted on a circuit board; and a heat dissipation structure, which is manufactured independently and has a first-layer flat plate disposed above the integrated circuit and in thermal contact therewith, and a cavity located on one side of the first-layer flat plate. The cavity is formed with at least one opening to accommodate a passive device. During assembly, the passive device is inserted into the cavity of the heat dissipation structure through the at least one opening and is electrically connected to the circuit board or the integrated circuit via an electrical conductor of the passive device. Heat generated by the integrated circuit is transferred through the heat dissipation structure.

IPC Classes  ?

• H01L 23/367 - Cooling facilitated by shape of device
• H01L 21/48 - Manufacture or treatment of parts, e.g. containers, prior to assembly of the devices, using processes not provided for in a single one of the groups or
• H01L 21/50 - Assembly of semiconductor devices using processes or apparatus not provided for in a single one of the groups or
• H01L 23/00 - Details of semiconductor or other solid state devices
• H01L 23/373 - Cooling facilitated by selection of materials for the device
• H01L 25/18 - Assemblies consisting of a plurality of individual semiconductor or other solid-state devices the devices being of types provided for in two or more different main groups of the same subclass of , , , , or
• H10D 1/20 - Inductors

Abstract

A buck converter includes a power stage, a feedback network coupled to the power stage, a control loop, a logic circuit coupled to the control loop, a driver circuit coupled between the logic circuit and the power stage, and a load detection circuit. The power stage includes an input terminal for receiving an input voltage, and an output terminal for outputting an output voltage. The feedback network is used to generate a feedback voltage according to the output voltage. The control loop includes an error amplifier (EA) and a comparator coupled to the error amplifier. The error amplifier is used to generate an EA voltage by comparing a reference voltage to the feedback voltage. The comparator coupled to the error amplifier, is used to generate a CMP signal according the EA voltage.

IPC Classes  ?

• H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
• H02M 1/00 - Details of apparatus for conversion
• H02M 3/156 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
• H03K 19/173 - Logic circuits, i.e. having at least two inputs acting on one outputInverting circuits using specified components using elementary logic circuits as components

Abstract

A cooling fan system includes: multiple fan circuits for driving corresponding multiple fan devices according to corresponding PWM signals; and a management controller for controlling and adjusting the multiple fan circuits to detect a fault prediction status of the multiple fan circuits. During a test procedure, the management controller performs feedback control of a current rotational speed vector of the multiple fan circuits to a target rotational speed vector according to a rotational speed feedback signal returned from each of the multiple fan circuits, and establishes a system coefficient table based on a predetermined electrical parameter vector corresponding to the target rotational speed vector. During an operation procedure, the management controller determines an operation rotational speed vector according to an environmental condition, and performs feedback control of the current rotational speed vector to the operation rotational speed vector, and detects the fault prediction status based on the system coefficient table.

IPC Classes  ?

• F04D 27/00 - Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
• G05B 23/02 - Electric testing or monitoring

Abstract

A driving circuit includes a high-side transistor, a first low-side transistor, a second low-side transistor, and a control circuit. The high-side transistor is coupled between an input voltage and a switch node. The first low-side transistor is coupled between the switch node and a ground. The second low-side transistor is coupled between the switch node and the ground. The control circuit periodically and individually turns on the high-side transistor and the first low-side transistor. After the first low-side transistor is turned off, the control circuit keeps the second low-side transistor on until the high-side transistor is turned on, so as to eliminate the reverse recovery charge of the first low-side transistor.

IPC Classes  ?

• H03K 3/012 - Modifications of generator to improve response time or to decrease power consumption
• H03K 17/56 - Electronic switching or gating, i.e. not by contact-making and -breaking characterised by the use of specified components by the use, as active elements, of semiconductor devices

Abstract

A resonant power conversion circuit for converting an input voltage to an output voltage includes a transformer, a resonant capacitor, a high-side transistor, a low-side transistor, and a control circuit. The transformer includes a primary coil. The resonant capacitor and the primary coil are connected in series to a switch node. The high-side transistor provides the input voltage to the switch node, and the low-side transistor couples the switch node to the ground. In each switch cycle, the control circuit sequentially turns on the high-side transistor, turns on the low-side transistor, turns on the high-side transistor twice, turns on the low-side transistor twice, and turns off both the high-side transistor and the low-side transistor.

IPC Classes  ?

• H02M 3/00 - Conversion of DC power input into DC power output
• H02M 1/00 - Details of apparatus for conversion
• H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

A switching circuit includes a first transistor, which is a compound junction transistor; and a second transistor, which is an enhancement-type MOS transistor. The first transistor and the second transistor are connected in series between the first and second terminals of the switching circuit and are configured to control conduction and cutoff between these two ends. A first gate voltage is configured to control the gate of the first transistor; a second gate voltage is configured to control the gate of the second transistor. A level-shifting circuit is configured to generate the first gate voltage based on a voltage correlated with the second gate voltage.

IPC Classes  ?

• H03K 17/687 - Electronic switching or gating, i.e. not by contact-making and -breaking characterised by the use of specified components by the use, as active elements, of semiconductor devices the devices being field-effect transistors
• H02M 1/088 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
• H03K 17/567 - Circuits characterised by the use of more than one type of semiconductor device, e.g. BIMOS, composite devices such as IGBT

Abstract

The present invention discloses a multi-phase converter circuit, which includes at least one two-phase converter circuit coupled between a first voltage and a second voltage, and employs switching control of at least one capacitor and at least one coupled inductor, with alternated charging phase and discharging phase, to achieve power conversion between the first voltage and the second voltage.

IPC Classes  ?

• H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
• H02M 1/00 - Details of apparatus for conversion
• H02M 1/38 - Means for preventing simultaneous conduction of switches
• H02M 1/44 - Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
• H02M 3/07 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode

Abstract

A power conversion circuit includes a transformer, a resonant capacitor, a high-side transistor, a low-side transistor, a current detection circuit, a feedback circuit, and a control circuit. The transformer includes a primary coil connected with the resonant capacitor in series. The high-side transistor and the low-side transistor are coupled to the primary coil. The current detection circuit detects a resonant current flowing through the resonant capacitor to generate a current detection signal. The feedback signal generates a feedback signal based on the output voltage of the power conversion circuit. The control circuit integrates a superposition signal of the current detection signal and a slope compensation signal to generate a first integrated signal, integrates the feedback signal to generate a second integrated signal, and compares the first integrated signal to the second integrated signal to drive the high-side transistor and the low-side transistor.

IPC Classes  ?

• H02M 3/00 - Conversion of DC power input into DC power output
• H02M 1/00 - Details of apparatus for conversion
• H02M 1/32 - Means for protecting converters other than by automatic disconnection

Abstract

A switch control circuit, for controlling a path switch and a current sense resistor connected in series between an input voltage and an output voltage, includes: an amplifier, which controls the gate voltage of the path switch based on a voltage drop across the current sense resistor to perform current-limited soft start; a slope detection circuit, coupled to the output voltage, for monitoring the rising slope of the output voltage; and a pull-down switch, coupled between the gate of the path switch and a disabling potential. When the slope detection circuit detects that a rising slope of the output voltage is below a preset slope threshold, the pull-down switch is triggered to conduct, thereby turning off the path switch.

IPC Classes  ?

• H03K 17/28 - Modifications for introducing a time delay before switching

Abstract

A switching regulator includes: a phase number signal generator circuit configured to operably generate a phase number signal based upon a current sensing signal correlated with a total current flowing through the plurality of the power stage circuits; and an AQR signal generator circuit which includes: a voltage sensing signal differentiator circuit for performing differentiation on a voltage sensing signal to generate a voltage differentiation signal; and plural comparator circuits for comparing the voltage differentiation signal with plural AQR threshold signals to generate plural AQR comparison signals, so as to generate an AQR signal to control an operation signal generator circuit to perform an adaptive quick response procedure.

IPC Classes  ?

• H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load

Abstract

A flyback converter includes: a transformer, including a primary, a secondary, and an auxiliary winding; a first switch, coupled to the transformer; a sensing resistor, for sensing a current through the first switch to generate a current sensing signal; an impedance element, coupled to the auxiliary winding; and a primary-side control circuit including a multifunctional pin, an auxiliary signal sensing circuit, and a current sensing circuit, and controlling the first switch to switch the primary winding. During an off-period, the auxiliary signal sensing circuit collaboratively generates an auxiliary current with the impedance element through the multifunctional pin, and receives the auxiliary current through the multifunctional pin to generate an auxiliary-related output signal. During an on-period, the current sensing circuit receives the current sensing signal through the multifunctional pin to generate a current-related output signal. The auxiliary current is positively correlated to an auxiliary voltage of the auxiliary winding.

IPC Classes  ?

• H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
• H02M 1/00 - Details of apparatus for conversion

Abstract

A driving circuit for driving a synchronous rectification transistor includes a first comparator, a second comparator, a third comparator, and a gate driving circuit. When the voltage of the drain terminal of the synchronous rectification transistor is less than a first threshold, the first comparator enables a first comparison signal. When the voltage of the drain terminal is not less than a second threshold, the second comparator enables a second comparison signal. When the voltage of the drain terminal is not less than a third threshold, the third comparator enables a third comparison signal. The gate driving circuit provides a gate voltage to a gate terminal of the synchronous rectification transistor based on the first comparison signal, the second comparison signal, and the third comparison signal.

IPC Classes  ?

• H02M 1/08 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
• H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

A control circuit for reducing reverse recovery charge in a switching converter includes a first control signal configured to switch a first transistor, a second control signal configured to switch a second transistor, and an auxiliary control signal configured to switch an auxiliary transistor. A first terminal and a second terminal of the first transistor are coupled in parallel to a first terminal and a second terminal of the auxiliary transistor. The first transistor and the second transistor are coupled to a switching node, configured to periodically switch an inductor to convert an input voltage into an output voltage. A delay time exists between the time when the auxiliary control signal is deactivated and the time when the first control signal is deactivated. The auxiliary control signal is deactivated after the second control signal is activated.

IPC Classes  ?

• H02M 1/00 - Details of apparatus for conversion
• H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load

Abstract

A power conversion circuit includes a transformer, a resonant capacitor, a resonant inductor, a high-side transistor, a low-side transistor, and a control circuit. The transformer includes a primary coil and a secondary coil. The primary coil, the resonant capacitor, and the resonant inductor are connected in series between a switch node and a ground. The high-side transistor provides an input voltage to a switch node based on the high-side driving signal. The low-side transistor couples the switch node to the ground based on the low-side transistor. The control circuit operates in a pulse frequency modulation mode to generate the high-side transistor and the low-side transistor with a switch frequency. When the switch frequency exceeds the first threshold, the control circuit switches from the pulse frequency modulation mode to the pulse width modulation mode.

IPC Classes  ?

• H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
• H02M 1/00 - Details of apparatus for conversion
• H02M 3/00 - Conversion of DC power input into DC power output

Abstract

A switch circuit with current sensing functionality includes: a first and second switch, coupled between a first and second terminal of the switch circuit, and configured to control a conductive state between the first and second terminal according to a control signal; and a current sensing circuit configured to sense a first switch current flowing through the first switch. The current sensing circuit includes: a third switch, a gate and a source of the third switch being coupled in parallel with the first switch to generate a third switch current; a first error amplifier circuit configured to control a drain voltage of the third switch to track a drain voltage of the first switch through feedback, thereby making the third switch current positively correlated to the first switch current; and a current-to-voltage conversion circuit configured to generate a sensing voltage based on the third switch current.

IPC Classes  ?

• H03K 17/687 - Electronic switching or gating, i.e. not by contact-making and -breaking characterised by the use of specified components by the use, as active elements, of semiconductor devices the devices being field-effect transistors
• G01R 19/00 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof

Abstract

A power source circuit includes: a first and a second multifunctional pins, configured for communication and temperature sensing. A temperature sensing component is coupled between the first and second multifunctional pins. In a connection detection mode, a connection detection current is provided through the first and/or second multifunctional pin to detect whether a power sink circuit is connected to the power source circuit. The power sink circuit includes a pull-down resistor couple to the first and/or second multifunctional pin for determining whether the power source circuit is connected to the power sink circuit. When the power sink circuit is connected to the power source circuit, in a temperature sensing mode, the first and second multifunctional pins are configured into a temperature sensing configuration to generate an electrical characteristic on the temperature sensing component, and to obtain the electrical characteristic through the first and/or second multifunctional pin, thereby performing temperature sensing.

IPC Classes  ?

• H02M 1/32 - Means for protecting converters other than by automatic disconnection
• G01K 7/16 - Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat using resistive elements
• H02M 1/00 - Details of apparatus for conversion

Abstract

A power conversion circuit includes a transformer, a resonant capacitor, a high-side transistor, a low-side transistor, and a control circuit. The transformer includes a primary coil and a secondary coil, and the primary coil is coupled between a switch node and a resonant node. The resonant capacitor is coupled between the resonant node and a ground. The high-side transistor provides an input voltage to the switch node based on a high-side driving signal. The low-side transistor couples the switch node to the ground based on a low-side driving signal. The control circuit generates the high-side driving signal and the low-side driving signal. When the control circuit executes a startup process, the control circuit discharges the resonant capacitor.

IPC Classes  ?

• H02M 1/36 - Means for starting or stopping converters
• H02M 3/00 - Conversion of DC power input into DC power output
• H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

A bandgap reference voltage generation circuit includes two bipolar junction transistors biased at different current densities to generate a base-emitter voltage difference, and to determine a negative temperature coefficient current. The circuit further includes a delta-voltage sensing resistor and a feedback circuit to ensure that the voltage drop across the delta-voltage sensing resistor includes the voltage difference, thereby generating a positive temperature coefficient current. The positive and negative temperature coefficient currents are combined to bias an output resistor, generating an output current with low-order temperature compensation. A multi-stage compensation circuit further generates a compensation current, which is injected into a tap of the output resistor to form a bandgap reference voltage with high-order temperature compensation. The compensation current varies with temperature and exhibits at least three stages of temperature coefficient.

IPC Classes  ?

• G05F 3/26 - Current mirrors

Abstract

A conversion control circuit for controlling a stackable multi-phase power converter, the conversion control circuit including: a master transfer terminal, wherein a master transfer trigger signal is coupled to plural master transfer terminals of plural parallel-connected conversion control circuits; and a master transfer circuit configured to generate or receive the master transfer trigger signal through the master transfer terminal, wherein the master transfer trigger signal is generated according to an output voltage or an output current of the output power, or a pulse-width modulation related signal; when the master transfer trigger signal switches to an enabled state, the conversion control circuits perform a phase sequence swapping procedure, which includes: the master transfer circuit triggering a transfer of a master role from the stackable sub-converter originally acting as the master circuit to another stackable sub-converter of the stackable sub-converters.

IPC Classes  ?

• H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
• H02M 7/493 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode the static converters being arranged for operation in parallel

Abstract

A class-D amplifier includes a loop filter, a PWM generator coupled to the loop filter, a first multiplexer coupled to the PWM generator, a second multiplexer coupled to the PWM generator, and a power stage coupled to the first multiplexer and the second multiplexer. The loop filter is used to generate positive and negative LPF signals according to first and second analog signals, and first and a second feedback signals. The PWM generator is used to generate positive and negative PWM signals according to the positive and negative LPF signals respectively. The first and second multiplexer are used to output first and second MUX signals selected from a signal group. The power stage is used to generate a positive output signal to a positive output terminal according to the first MUX signal, and a negative output signal to a negative output terminal according to the second MUX signal.

IPC Classes  ?

• H03F 3/217 - Class D power amplifiersSwitching amplifiers
• H03F 3/45 - Differential amplifiers

Abstract

A multi-level boost power converter circuit includes: at least two high-side switches; at least two low-side switches; a first capacitor; an inductor; and a control circuit configured to generate plural operation signals. The first end of the first capacitor is coupled between the at least two high-side switches, and the second end of the first capacitor is coupled between the at least two low-side switches. One end of the inductor is coupled to the input voltage, and the other end of the inductor is coupled to an inductor switching node, which is connected to either the first or second end of the first capacitor. The plural operation signals are configured to control the at least two high-side switches and the at least two low-side switches, thereby switching the voltage at the inductor switching node between a first divided voltage of the output voltage and the output voltage, or between the first divided voltage of the output voltage and a reference level.

IPC Classes  ?

• H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
• H02M 1/00 - Details of apparatus for conversion

Abstract

The present invention provides an apparatus having an inductor and a high thermal conductivity frame, and a manufacturing method thereof. The apparatus comprises: an inductor having at least two internal conductors, the inductor being embedded in magnetic powder material; and a frame made of a high thermal conductivity material, the frame including a top plate located above the at least two internal conductors, bottom plate located below the at least two internal conductors, and at least one connecting bar between the top plate and the bottom plate, with the frame embedded within the magnetic powder material; wherein the apparatus is disposed above an electronic component and is in contact with the electronic component through the bottom plate of the frame.

IPC Classes  ?

• H01F 27/22 - Cooling by heat conduction through solid or powdered fillings
• H01F 27/06 - Mounting, supporting, or suspending transformers, reactors, or choke coils
• H01F 27/255 - Magnetic cores made from particles
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets

Abstract

A power conversion circuit includes a transformer, a resonant capacitor, a high-side transistor, a low-side transistor, and a control circuit. The transformer includes a primary coil and a secondary coil, and the primary coil is coupled between a switch node and a resonant node. The resonant capacitor is coupled between the resonant node and a ground. The high-side transistor provides an input voltage to the switch node based on a high-side driving signal. The low-side transistor couples the switch node to the ground based on a low-side driving signal. The control circuit generates the high-side driving signal and the low-side driving signal. When the power converting circuit starts up, the control circuit generates a precharge signal to precharge the resonant capacitor.

IPC Classes  ?

• H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
• H02M 3/00 - Conversion of DC power input into DC power output

Abstract

A conversion control circuit for controlling a stackable multiphase power converter, wherein the stackable multiphase power converter includes plural stackable sub-converters, each of which includes a power stage circuit and a conversion control circuit. The conversion control circuit includes: a synchronization terminal, through which a synchronization signal is transmitted and received among the plurality of synchronization terminals of the plural conversion control circuits; and a fault indication signal or status, where plural pulses of the synchronization signal have a fault indication status. When at least one of the plural stackable sub-converters experiences a fault, the fault indication signal or status indicates and controls the conversion control circuit to enter a fault operation. The fault operation includes: the fault indication signal or the fault indication status disables a faulty one of the plural stackable sub-converters, and one of the non-faulty ones among the plural stackable sub-converters takes over.

IPC Classes  ?

• H02M 1/32 - Means for protecting converters other than by automatic disconnection
• H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load

Abstract

A power conversion circuit converting an input voltage into an output voltage includes a transformer, a resonant capacitor, a high-side transistor, a low-side transistor, and a control circuit. The transformer includes a primary coil and a secondary coil. The resonant capacitor and the primary coil are coupled in series between a switch node and a ground, and a resonant current flows through the resonant capacitor. The high-side transistor is coupled between the input voltage and the switch node, and the low-side transistor is coupled between the switch node and the ground. The control circuit drives the high-side transistor and the low-side transistor based on the output voltage and the resonant current. When the resonant current reaches a first threshold, the control circuit turns off the low-side transistor so that the high-side transistor achieves zero-voltage switching.

IPC Classes  ?

• H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
• H02M 1/00 - Details of apparatus for conversion
• H02M 1/38 - Means for preventing simultaneous conduction of switches
• H02M 3/00 - Conversion of DC power input into DC power output

Abstract

A power conversion system includes: a rectifier for rectifying an AC input voltage to generate a rectified voltage; a power stage circuit coupled to the rectifier; a sensing circuit coupled between a multiplex pin and either the AC input voltage or the rectified voltage and configured to generate a multiplexed sensing signal; and a control circuit for performing operations for over-temperature protection and brown-out protection during respective over-temperature and brown-out protection periods based on the status of the multiplexed sensing signal. The control circuit includes: the multiplex pin; and a current source and a bias switch, serially coupled to the multiplex pin. During the over-temperature protection period, the bias switch is conductive to provide a bias current to the sensing circuit to generate a temperature sensing signal. Outside the over-temperature protection period, the bias switch is non-conductive to stop providing the bias current, thereby generating an input voltage sensing signal.

IPC Classes  ?

• H02M 7/217 - Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
• H02M 1/32 - Means for protecting converters other than by automatic disconnection

Abstract

A spread spectrum control circuit generates a pulse-width modulation (PWM) signal with a switching frequency to control a switching power converter. The switching power converter includes a power stage, which includes an inductor and at least one switch coupled to each other, and the at least one switch is controlled by the PWM signal to convert an input voltage to an output voltage. The spread spectrum control circuit includes: a spread spectrum adjustment circuit, for generating a spread spectrum adjustment signal based on operating parameters of the switching power converter, thereby controlling the switching frequency exhibiting spread spectrum characteristics; and a PWM circuit, for adaptively adjusting a spread spectrum adjustment parameter of the spread spectrum characteristic according to the spread spectrum adjustment signal, such that the spread spectrum adjustment parameter are adaptively adjusted with the changes in the operating parameters, thereby generating the PWM signal exhibiting spread spectrum characteristics.

IPC Classes  ?

• H03K 3/012 - Modifications of generator to improve response time or to decrease power consumption
• H03K 3/017 - Adjustment of width or dutycycle of pulses

Abstract

The present invention provides an integrated package structure with an inductor and an integrated circuit and a manufacturing method thereof. The integrated package structure includes: a substrate with a predetermined circuit layout; an integrated circuit positioned on the substrate, wherein the integrated circuit is joined to the substrate in a flip-chip configuration, and a joint between the integrated circuit and the substrate is encapsulated by a covering material, with a back surface of the integrated circuit exposed; and an inductor, positioned above the integrated circuit, wherein a lower surface of the inductor is connected to the back surface of the integrated circuit, and at least a portion of a contact area between the inductor's lower surface and the back surface of the integrated circuit is free from encapsulation material.

IPC Classes  ?

• H01L 25/18 - Assemblies consisting of a plurality of individual semiconductor or other solid-state devices the devices being of types provided for in two or more different main groups of the same subclass of , , , , or
• H01L 21/3105 - After-treatment
• H01L 21/48 - Manufacture or treatment of parts, e.g. containers, prior to assembly of the devices, using processes not provided for in a single one of the groups or
• H01L 21/56 - Encapsulations, e.g. encapsulating layers, coatings
• H01L 23/00 - Details of semiconductor or other solid state devices
• H01L 23/31 - Encapsulation, e.g. encapsulating layers, coatings characterised by the arrangement
• H01L 23/367 - Cooling facilitated by shape of device
• H01L 23/498 - Leads on insulating substrates
• H05K 1/18 - Printed circuits structurally associated with non-printed electric components

Abstract

A power conversion circuit includes a high-side transistor, a low-side transistor, and a driving circuit. The high-side transistor provides an input voltage to a switch node based on a first signal. The low-side transistor couples the switch node to a ground based on a second signal, and is deposited in an isolation layer. The driving circuit generates the first signal, the second signal, and the third signal, provides a third signal to the isolation layer, and generates the third signal based on the first signal and the second signal.

IPC Classes  ?

• H02M 1/088 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
• H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
• H03K 17/687 - Electronic switching or gating, i.e. not by contact-making and -breaking characterised by the use of specified components by the use, as active elements, of semiconductor devices the devices being field-effect transistors
• H10D 84/00 - Integrated devices formed in or on semiconductor substrates that comprise only semiconducting layers, e.g. on Si wafers or on GaAs-on-Si wafers

Abstract

An inductor module includes a magnetic material, at least one internal conductor and a thermal conductive frame. The at least one internal conductor is placed within the magnetic material. The thermal conductive frame is placed in the magnetic material and includes an upper structure, a lower structure and a connecting bar. The connecting bar connects the upper structure and the lower structure.

IPC Classes  ?

• H01F 27/08 - CoolingVentilating
• H01F 27/24 - Magnetic cores
• H01F 27/28 - CoilsWindingsConductive connections
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
• H01F 41/04 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets for manufacturing coils

Abstract

A power converter includes a transformer, a resonant capacitor, a high-side transistor, a low-side transistor, a rectification circuit, a feedback circuit, a detection circuit, and a control circuit. The transformer includes a primary coil coupled to a switch node and a secondary coil. The resonant capacitor is coupled to the primary coil. The high-side transistor provides an input voltage to the switch node, and the low-side transistor couples the switch node to the ground. The rectification circuit converts the energy of the secondary coil into an output voltage. The feedback circuit compares the output voltage with a reference voltage to generate a compensation signal. The detection circuit generates a current detection signal and a voltage detection signal. The control circuit drives the high-side transistor and the low-side transistor based on the current detection signal, the voltage detection signal, the compensation signal, and the input signal.

IPC Classes  ?

• H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
• H02M 1/00 - Details of apparatus for conversion
• H02M 1/38 - Means for preventing simultaneous conduction of switches
• H02M 3/00 - Conversion of DC power input into DC power output

Abstract

A gate drive circuit includes a voltage summer, a driver, a power transistor and a resistor. The voltage summer includes a first input terminal for receiving a reference voltage, a second input terminal for receiving a common source voltage, and an output terminal for generating a summed voltage according to the common source voltage and the reference voltage. The driver includes a first input terminal coupled to the output terminal of the voltage summer, a second input terminal for receiving a pulse width modulation (PWM) signal, and an output terminal for generating a gate voltage according to the summed voltage and the pulse width modulation signal. The power transistor includes a first terminal, a second terminal, and a control terminal coupled to the output terminal of the driver. The resistor is coupled between the second terminal of the power transistor and a ground terminal.

IPC Classes  ?

• H03K 17/0812 - Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit by measures taken in the control circuit
• H03K 17/08 - Modifications for protecting switching circuit against overcurrent or overvoltage

Abstract

A gate driver circuit provides a soft-start current to a gate of a power switch during a soft-start period to soft-start the power switch. The gate driver circuit includes: a first current mirror circuit, configured to mirror a reference current according to a mirror ratio to generate a mirror output current; and a path switch coupled on a signal path between the mirror output current and the soft-start current. The soft-start current is generated according to the mirror output current. The path switch is configured to turn off the signal path when the power switch is off. The mirror ratio of the first current mirror circuit is reduced during a predetermined period in the soft-start period to compensate for a spike caused by the path switch being turned on during the soft-start period, such that the soft-start current is prevented from surging during the soft-start period.

IPC Classes  ?

• H03K 17/16 - Modifications for eliminating interference voltages or currents

Abstract

An integrated packaging module includes an integrated circuit packaging module and an inductor. The integrated circuit packaging module includes a substrate, a chip, a block terminal and an encapsulation material. The chip is disposed on the substrate and is connected to the substrate in a flip-chip manner, with the back of the chip facing upward. The block terminal is disposed on the base substrate. The encapsulation material covers the substrate and exposes the back of the chip and the upper surface of the block terminal. The inductor is disposed above the integrated circuit packaging module and includes an electrical contact coupled to the block terminal.

IPC Classes  ?

• H01L 23/367 - Cooling facilitated by shape of device
• H01L 23/00 - Details of semiconductor or other solid state devices
• H01L 23/31 - Encapsulation, e.g. encapsulating layers, coatings characterised by the arrangement
• H01L 23/498 - Leads on insulating substrates
• H01L 23/538 - Arrangements for conducting electric current within the device in operation from one component to another the interconnection structure between a plurality of semiconductor chips being formed on, or in, insulating substrates
• H01L 25/16 - Assemblies consisting of a plurality of individual semiconductor or other solid-state devices the devices being of types provided for in two or more different subclasses of , , , , or , e.g. forming hybrid circuits

Abstract

A control circuit for a resonant flyback power converter includes high-side and low-side signals to control respective high-side and low-side transistors. It uses a negative current signal from an auxiliary winding related to its cross-voltage. The circuit generates a threshold and a sensing signal based on the activation and deactivation of the high-side and low-side transistors respectively, and a triggering signal by comparing the sensing signal with the threshold. The high-side and low-side transistors switch a primary winding through a resonant capacitor, generating an output voltage through a secondary winding. The pulse width of the low-side signal is adjusted based on the triggering signal to achieve zero voltage switching (ZVS) of the high-side transistor.

IPC Classes  ?

• H02M 1/00 - Details of apparatus for conversion
• H02M 3/00 - Conversion of DC power input into DC power output
• H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

A power conversion circuit includes a resonant capacitor, a transformer, a high-side transistor, a low-side transistor, and a control circuit. The resonant capacitor is coupled to the switch node. The transformer includes a primary coil coupled to the resonant capacitor and a secondary coil. The high-side transistor and the low-side transistor couples the input voltage and the ground to the switch node. The control circuit generates a first signal in response to the high-side transistor being turned on, generates a second signal in response to the high-side transistor and the low-side transistor being both turned off, and generates a third signal by comparing the second signal with a voltage threshold corresponding to the first signal. The control circuit adjusts the on-time of the low-side transistor based on the third signal, so that the high-side transistor achieves zero-voltage switching.

IPC Classes  ?

• H02M 1/00 - Details of apparatus for conversion
• H02M 1/08 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
• H02M 3/00 - Conversion of DC power input into DC power output
• H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

A polysilicon-insulator-polysilicon (PIP) structure includes: a first polysilicon region formed on a substrate; a first insulation region formed outside one side of the first polysilicon region and adjoined to the first polysilicon region in a horizontal direction; and a second polysilicon region formed outside one side of the first insulation region. The first polysilicon region, the first insulation region and the second polysilicon region are adjoined in sequence in the horizontal direction. The second polysilicon region is formed outside the first insulation region by a first self-aligned process step, and the first insulation region is formed outside the first polysilicon region by a second self-aligned process step.

IPC Classes  ?

• H01L 21/28 - Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups
• H01L 21/768 - Applying interconnections to be used for carrying current between separate components within a device
• H10D 1/00 - Resistors, capacitors or inductors
• H10D 1/68 - Capacitors having no potential barriers
• H10D 30/01 - Manufacture or treatment
• H10D 30/60 - Insulated-gate field-effect transistors [IGFET]
• H10D 64/00 - Electrodes of devices having potential barriers
• H10D 64/66 - Electrodes having a conductor capacitively coupled to a semiconductor by an insulator, e.g. MIS electrodes
• H10D 84/80 - Integrated devices formed in or on semiconductor substrates that comprise only semiconducting layers, e.g. on Si wafers or on GaAs-on-Si wafers characterised by the integration of at least one component covered by groups or , e.g. integration of IGFETs

Abstract

A hybrid switching converter includes plural switches and a control circuit. The plural switches include first to (K+1)th high-side switches. A first terminal of a first flying capacitor is coupled to an input voltage through the first high-side switch, and first terminals of each of second to Kth flying capacitors are respectively coupled to the first terminal of the preceding flying capacitor through the second to Kth high-side switches. Second terminals of each of the first to Kth flying capacitors are respectively electrically connected to second terminals of first to Kth inductors at first to Kth switching nodes. A first terminal of the (K+1)th high-side switch is electrically connected to the first terminal of the Kth flying capacitor, and a second terminal of the (K+1)th high-side switch is electrically connected to a second terminal of a (K+1)th inductor at a (K+1)th switching node. The control circuit generates plural control signals to control the plural switches for periodic switching.

IPC Classes  ?

• H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
• H02M 1/00 - Details of apparatus for conversion

Abstract

A switching power converter includes: a power stage circuit for converting an input voltage to an output voltage by switching an inductor with a synchronous or an asynchronous mode; an error amplifier to generate an error amplified signal; a modulation comparator for generating a primary modulation signal by comparing the error amplified signal and a ramp signal; a pulse skipping comparator for generating a pulse skipping control signal by comparing the error amplified signal and a skipping reference signal; and a switching control unit for masking the primary modulation signal by the pulse skipping control signal. During the synchronous mode, the skipping reference signal has a predetermined reference level. At the beginning after the synchronous mode is changed to the asynchronous mode, the skipping reference signal turns to the predetermined reference level superposing a compensation reference level, and subsequently the skipping reference signal gradually returns to the predetermined reference level.

IPC Classes  ?

• H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
• H02M 1/00 - Details of apparatus for conversion

Abstract

The present invention provides a high-side switch device having split gates. The high-side switch device includes: at least one tie-gate high-side switch device, each having a split gate independently connected to a gate; and at least one tie-source high-side switch device, each having a split gate independently connected to a source. The at least one tie-gate high-side switch device and the at least one tie-source high-side switch device are electrically connected in parallel. The quantity ratio of the at least one tie-gate high-side switch device to the at least one tie-source high-side switch device can be adjusted to modulate the Miller capacitance of the high-side switch device having split gates.

IPC Classes  ?

• H01L 29/78 - Field-effect transistors with field effect produced by an insulated gate
• H01L 25/07 - Assemblies consisting of a plurality of individual semiconductor or other solid-state devices all the devices being of a type provided for in a single subclass of subclasses , , , , or , e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in subclass
• H01L 27/088 - Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being a semiconductor body including only semiconductor components of a single kind including field-effect components only the components being field-effect transistors with insulated gate
• H01L 29/08 - Semiconductor bodies characterised by the shapes, relative sizes, or dispositions of the semiconductor regions with semiconductor regions connected to an electrode carrying current to be rectified, amplified, or switched and such electrode being part of a semiconductor device which comprises three or more electrodes
• H01L 29/66 - Types of semiconductor device

Abstract

A control circuit adapted to a flyback converter includes a feedback circuit, a first current mirror, a second current mirror, a compensation resistor, and a pole adjuster. The feedback circuit generates a feedback current based on the output voltage from the flyback converter. The first current mirror maps the feedback current to a first mapping current. The second current mirror maps the first mapping current to a second mapping current. The compensation resistor is coupled to an internal node. The second mapping current flows through the compensation resistor to generate an internal voltage at the internal node. The pole adjuster generates a compensation voltage based on the internal voltage. The flyback converter raises the output power of the output voltage as the compensation voltage increases.

IPC Classes  ?

• H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
• H02M 1/00 - Details of apparatus for conversion
• H02M 1/32 - Means for protecting converters other than by automatic disconnection

Abstract

A power conversion circuit is provided, which includes a transformer, a high-side switch, a low-side switch, and a control circuit. The transformer includes a primary coil and a secondary coil. The secondary coil generates the output voltage of the power conversion circuit. The high-side switch and the low-side switch are coupled to the primary coil and act as a half-bridge circuit to magnetize and demagnetize the transformer. The control circuit individually turns on the high-side switch and the low-side switch based on a feedback signal and a current detection signal to regulate the output voltage. The feedback signal is related with the output voltage, and the current detection signal is indicative of the current flowing through the primary coil. The control circuit further generates a power signal related to the output current of the power conversion circuit.

IPC Classes  ?

• H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
• H02M 1/00 - Details of apparatus for conversion
• H02M 1/42 - Circuits or arrangements for compensating for or adjusting power factor in converters or inverters

Abstract

A manufacturing method of a semiconductor integrated structure having a high voltage device, a low voltage device and a capacitor, includes: forming a bottom thermal oxide layer on a substrate; forming a chemical vapor deposition (CVD) oxide layer; forming a poly silicon hard mask layer; etching the poly silicon hard mask layer to form a high voltage poly silicon hard mask and a first electrode plate simultaneously; etching the CVD oxide layer and using the high voltage poly silicon hard mask and the first electrode plate as etching barrier layers to form a high voltage CVD oxide region and a capacitor CVD oxide region simultaneously; etching the bottom thermal oxide layer and using the high voltage poly silicon hard mask and the first electrode plate as the etching barrier layers to form a high voltage bottom thermal oxide region and a bottom thermal oxide region simultaneously.

IPC Classes  ?

• H01L 21/8234 - MIS technology
• H01L 21/265 - Bombardment with wave or particle radiation with high-energy radiation producing ion implantation

Abstract

A manufacturing method of a power device having a dual polysilicon gate, including: forming a well in a substrate; forming a gate oxide layer; forming a polysilicon gate layer; forming a photo resist layer on the polysilicon gate layer to define a reduced surface field region, an enhanced drift region, and a field plate groove; etching the polysilicon gate layer to form the field plate groove; implanting a plurality of first and second conductivity type dopants in the substrate to form the reduced surface field region and the enhanced drift region; forming a field plate region in the field plate groove; forming another polysilicon gate layer which connects and overlays the polysilicon gate layer and the field plate region; and etching the polysilicon gate layers to form a first poly silicon gate region and a second poly silicon gate region, so as to form the dual polysilicon gate.

IPC Classes  ?

• H01L 29/40 - Electrodes
• H01L 21/266 - Bombardment with wave or particle radiation with high-energy radiation producing ion implantation using masks
• H01L 21/306 - Chemical or electrical treatment, e.g. electrolytic etching
• H01L 21/308 - Chemical or electrical treatment, e.g. electrolytic etching using masks
• H01L 29/66 - Types of semiconductor device
• H01L 29/78 - Field-effect transistors with field effect produced by an insulated gate

Abstract

A conversion control circuit controls a resonant power converter and a first output voltage generated by a power factor correction (PFC) circuit. The resonant power converter generates a second output voltage based on the first output voltage. The conversion control circuit includes: a first transconductance circuit for generating a first signal based on a proportional output voltage related to the second output voltage; a second transconductance circuit for generating a second signal based on an input-related signal, wherein the input-related signal is related to a peak value of an input voltage of the PFC circuit; and a current control circuit for generating a third signal based on the first signal and the second signal. The third signal is for rendering the first output voltage such that the first output voltage decreases as the second output voltage decreases and also decreases as the input voltage decreases.

IPC Classes  ?

• H02M 1/42 - Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
• H02M 3/00 - Conversion of DC power input into DC power output
• H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

A clock signal duty ratio correction circuit includes: a period indication signal generation circuit configured to operably generate a period indication signal according to a clock signal, wherein a period indication level of the period indication signal is correlated with a period time of the clock signal; a first ramp signal generation circuit configured to operably generate a first ramp signal according to the clock signal; and a clock signal regeneration circuit configured to operably generate a clock regeneration signal according to a triggering of the clock signal and according to a comparison between the first ramp signal and the period indication level, such that the clock regeneration signal has a target duty ratio; wherein a slope of the first ramp signal is correlated with the target duty ratio.

IPC Classes  ?

• H03K 5/156 - Arrangements in which a continuous pulse train is transformed into a train having a desired pattern

Abstract

A current buffer includes: a current replication circuit for generating a first intermediate current at a first node and a second intermediate current at a second node according to an input current; a first impedance biasing circuit for providing a first input impedance at the first node and generating an output current according to a current flowing through the first node; a second impedance biasing circuit for providing a second input impedance at the second node; and a feedforward capacitor coupled between the first node and the second node. The first input impedance is lower than the second input impedance, such that a current gain between the output current and the input current has a zero and a pole which are related to the feedforward capacitor and the second input impedance. The zero has a lower frequency than the pole.

IPC Classes  ?

• H03F 3/45 - Differential amplifiers

Abstract

A Power-on Reset (POR) system includes: an SR latch circuit, powered by a supply voltage, for generating a POR signal according to the supply voltage and an enable signal; and at least one operating circuit, powered by the supply voltage. At least one state circuit in the operating circuit is reset by the POR signal. When the supply voltage starts up, an output terminal of the SR latch circuit has a predetermined state, such that after the supply voltage starts up and before the enable signal is enabled for a first time, the POR signal is in a reset state to reset the at least one state circuit in the operating circuit. After the supply voltage starts up and the enable signal is enabled for the first time, the POR signal turns to a non-reset state, and the operating circuit is enabled to operate according to the enable signal.

IPC Classes  ?

• H03K 17/22 - Modifications for ensuring a predetermined initial state when the supply voltage has been applied
• H03K 19/20 - Logic circuits, i.e. having at least two inputs acting on one outputInverting circuits characterised by logic function, e.g. AND, OR, NOR, NOT circuits

Abstract

A control circuit controls a multiphase power converter which includes plural power stage circuits, so as to convert an input power to an output power. The control circuit includes: a current sensing circuit, for sensing an output current for generating a current sensing signal; a transient detection circuit, for generating a transient indication signal by an output voltage; and a phase decision circuit, for generating a phase decision signal by a processed sensing signal and the transient indication signal, for determining an activated phase number. The phase decision circuit includes: a low-pass filter, for generating a low-pass-filtered signal by low-pass filtering the current sensing signal; and a multiplexer, for adaptively selecting the current sensing signal or the low-pass-filtered signal to be the processed sensing signal according to the transient indication signal.

IPC Classes  ?

• H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
• H02M 1/00 - Details of apparatus for conversion
• H02M 3/156 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators

Abstract

A clamping circuit for clamping its voltage difference between its first and second terminals includes: an offset operational trans-conductance amplification (OTA) circuit for generating an output current according to a differential mode voltage between its first and second terminals which have a common mode offset voltage; and an amplifier circuit for generating a first terminal voltage according to the output current of the offset OTA circuit, so as to clamp the voltage difference of the clamping circuit to not exceeding a clamping voltage level. The offset OTA circuit includes a first and a second offset OTA sub-circuits, which have common mode offset voltages, and an auxiliary offset circuit. The common mode offset voltage of the offset OTA circuit is equal to a sum of the common mode offset voltages of the first and the second offset OTA sub-circuit and an offset voltage of the auxiliary offset circuit.

IPC Classes  ?

• H03K 17/00 - Electronic switching or gating, i.e. not by contact-making and -breaking
• H03F 3/45 - Differential amplifiers
• H03K 17/10 - Modifications for increasing the maximum permissible switched voltage
• H03K 17/16 - Modifications for eliminating interference voltages or currents

Abstract

A power convertor includes a resonant capacitor, a transformer, a high-side transistor, a low-side transistor, a control circuit, and a rectifying circuit. The resonant capacitor is coupled between a resonant node and a ground. The transformer includes a primary coil coupled between a switch node and the resonant node and a secondary coil. The high-side transistor provides an input voltage to the switch node and the low-side transistor couples the switch node to the ground. The control circuit operates in either one of a flyback mode and a non-flyback mode, and drives the high-side transistor and the low-side transistor. When the control circuit operates in the resonant mode, the rectifying circuit full-wave rectifies the energy of the secondary coil to generate the output voltage.

IPC Classes  ?

• H02M 3/00 - Conversion of DC power input into DC power output
• H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

A power supply system with power factor correction (PFC) comprises an AC rectifier, a power factor correction (PFC) conversion circuit, a DC-DC converter, a protocol power delivery (PD) interface and a controller. The AC rectifier is used to rectify the AC input power to generate rectified power. The PFC conversion circuit is used to perform PFC conversion on the rectified power to generate converted power. The DC-DC converter is used to perform DC-DC conversion on the converted power to generate adapter output power. The protocol power delivery interface is used to determine the adapter output power according to a protocol information and control a power path switch to deliver the adapter output power to a power supply pin. The controller determines the converted voltage according to the rectified voltage and the adapter output voltage.

IPC Classes  ?

• H02M 1/42 - Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
• H02M 1/00 - Details of apparatus for conversion
• H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

A power supply system includes a power factor correction converter circuit and an isolated power converter circuit, wherein the power factor correction converter circuit corrects the power factor of a rectified power to generate a first output power, and the isolated power converter circuit converts the first output power to generate a second output power. The isolated power converter circuit includes a transformer, and the transformer includes a primary winding, a secondary winding, and an auxiliary winding. The auxiliary winding generates an auxiliary voltage which is related to the second output power. When the auxiliary voltage is lower than a disabled threshold, indicating that the voltage of the second output power is lower than a threshold, the power factor correction converter circuit provides a bypassing connection from the rectified power to the first output power and stops correcting the power factor of the rectified power.

IPC Classes  ?

• H02M 1/00 - Details of apparatus for conversion
• H02M 1/10 - Arrangements incorporating converting means for enabling loads to be operated at will from different kinds of power supplies, e.g. from AC or DC
• H02M 1/42 - Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
• H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

A power convertor includes a resonant capacitor, a transformer, a high-side transistor, a low-side transistor, a control circuit, and a rectification circuit. The resonant capacitor is coupled between a resonant node and a ground. The transformer includes a primary coil coupled between a switch node and the resonant node and a secondary coil. The high-side transistor provides an input voltage to the switch node and the low-side transistor couples the switch node to the ground. The control circuit drives the high-side transistor and the low-side transistor based on the feedback voltage, and operates in either a flyback mode or a non-flyback mode based on the output voltage. When the output voltage is lower than the output threshold, the control circuit operates in the flyback mode and the rectification circuit half-wave rectifies the energy of the secondary coil to generate the output voltage.

IPC Classes  ?

• H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
• H02M 1/00 - Details of apparatus for conversion
• H02M 1/38 - Means for preventing simultaneous conduction of switches
• H02M 3/00 - Conversion of DC power input into DC power output

Abstract

A conversion control circuit capable of recycling energy is configured to control an isolated power converter, converting an input power to generate an output power. The conversion control circuit generates an optocoupler current for a photodiode included in the optocoupler based on a control-related signal, transmitting the information of the control-related signal between the primary and secondary sides of the power converter via optical coupling to achieve power conversion. The conversion control circuit comprises a controllable current source circuit and a power conversion circuit. The controllable current source circuit generates a controllable current based on the control-related signal, wherein at least a portion of the controllable current is coupled to provide the optocoupler current. The power conversion circuit converts at least a portion of the optocoupler current into a supply power for an operating circuit, thereby recycling the energy generated by the optocoupler current.

IPC Classes  ?

• H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

A high voltage complementary metal oxide semiconductor (CMOS) device includes: a semiconductor layer, plural insulation regions, a first N-type high voltage well and a second N-type high voltage well, which are formed by one same ion implantation process, a first P-type high voltage well and a second P-type high voltage well, which are formed by one same ion implantation process, a first drift oxide region and a second oxide region, which are formed by one same etching process by etching a drift oxide layer; a first gate and a second gate, which are formed by one same etching process by etching a polysilicon layer, an N-type source and an N-type drain, and a P-type source and a P-type drain.

IPC Classes  ?

• H10D 84/85 - Complementary IGFETs, e.g. CMOS
• H10D 30/01 - Manufacture or treatment
• H10D 30/65 - Lateral DMOS [LDMOS] FETs
• H10D 84/01 - Manufacture or treatment
• H10D 84/03 - Manufacture or treatment characterised by using material-based technologies using Group IV technology, e.g. silicon technology or silicon-carbide [SiC] technology

Abstract

A power converting circuit includes an input end, two output ends, three nodes, a first switch coupled between the input end and the first node, a second switch coupled between the second node and a ground level, a third switch coupled between the third node and the ground level, a fourth switch coupled between the third node and the first output end, a fifth switch coupled between the second node and the second output end, a path control device, an inductor coupled between the first node and the third node, a first capacitor coupled between the first output end and the ground level, a second capacitor coupled between the second output end and the ground level, and a control circuit. The path control device adjusts the voltage difference between the first and the second nodes. The control circuit provides control signals for selectively turning on or turning off the switches.

IPC Classes  ?

• H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
• H02M 3/07 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode

Abstract

A method for controlling a motor controller is provided. The method includes, in a first mode: transmitting a control signal from a fan controller to a first motor controller through a first line. The method further includes, in the first mode, transmitting a control signal from a fan controller to a first motor controller through a first line. The method further includes, in the first mode, setting a voltage of the second line to a specific level of voltage to inform the first motor controller to enter a second mode using the fan controller. The method further includes, in the second mode, applying an Inter-Integrated Circuit (I2C) protocol to communicate between the fan controller and the first motor controller using the first line as a serial clock line (SCL) and using the second line as a serial data line (SDA).

IPC Classes  ?

• G06F 13/42 - Bus transfer protocol, e.g. handshakeSynchronisation
• G06F 13/40 - Bus structure

Abstract

A combination structure of semiconductor deep trench devices includes: a deep trench insulator device, which includes at least one deep trench ring unit, wherein the deep trench ring unit includes: a deep trench ring, a first dielectric side wall layer and a first poly silicon fill region; and a deep trench capacitor device, which includes a plurality of deep trench capacitor units and a cathode, wherein each of the deep trench capacitor units includes: a deep trench hole; a second dielectric side wall layer; and a second poly silicon fill region. The deep trench hole is formed by etching a semiconductor substrate with a same etch process step with the deep trench ring. The first dielectric side wall layer and the second dielectric side wall layer is formed by a same oxide growth process step.

IPC Classes  ?

• H01L 29/06 - Semiconductor bodies characterised by the shapes, relative sizes, or dispositions of the semiconductor regions
• H01L 27/02 - Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
• H01L 27/08 - Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being a semiconductor body including only semiconductor components of a single kind
• H01L 29/66 - Types of semiconductor device
• H01L 29/94 - Metal-insulator-semiconductors, e.g. MOS

Abstract

A semiconductor package structure includes: an interposer board, including a top side and a bottom side; a first ball grid array located on the bottom side of the interposer board, the first ball grid array including plural first soldering balls, wherein the first ball grid array provides a signal connection function between the interposer board and an external printed circuit board; and a second ball grid array located on the bottom side of the interposer board, the second ball grid array including plural second soldering balls, which are positioned within gaps between the first soldering balls on the bottom side.

IPC Classes  ?

• H01L 23/498 - Leads on insulating substrates
• H01L 21/48 - Manufacture or treatment of parts, e.g. containers, prior to assembly of the devices, using processes not provided for in a single one of the groups or

Abstract

A switching converter circuit for converting an input voltage to an output voltage includes: a feedback compensation circuit for producing a feedback compensation signal according to a difference between a feedback signal related to the output voltage and a reference signal; a modulation circuit for generating a modulation signal in accordance with the feedback compensation signal and a ramp signal; a power stage circuit for switching an inductor according to the modulation signal; and a ramp generator circuit for producing the ramp signal according to the input voltage, the output voltage and the modulation signal. The ramp signal includes: an anterior ramp signal and a posterior ramp signal. An absolute value of a slope of the posterior ramp signal gradually decreases as time increases. A starting time point of the modulation signal is decided by an intersection time point between the posterior ramp signal and the feedback compensation signal.

IPC Classes  ?

• H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
• H02M 1/00 - Details of apparatus for conversion

Abstract

A switching converter circuit includes: a power stage circuit and a current sensing circuit. The power stage circuit includes plural power switches, which include a circulation switch. The circulation switch is coupled in parallel to an inductor. When the circulation switch is turned ON, the inductor and the circulation switch constitute a circulation circuit. The current sensing circuit generates a current sensing signal. The power switches switch a switching node voltage at a switching node, thereby converting an input power to an output power. The circulation switch is controlled to be ON within a circulation period in each switching cycle, so that the switching node voltage is conducted to the output voltage. In a steady state, the inductor current circulates within the circulation circuit with a DC current level. The DC current level is lower than a peak of the inductor current.

IPC Classes  ?

• H02M 3/07 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode
• H02M 1/00 - Details of apparatus for conversion
• H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load

Abstract

A conversion control circuit for controlling a resonant power converter which includes a high-side and a low-side transistor which are coupled to convert an input voltage into an output voltage, and a resonant circuit including at least one resonant inductor and a resonant capacitor. The conversion control circuit includes: a sensing circuit for sensing a resonant-related parameter related to the resonance produced by the resonant circuit to generate a sensed signal; and a PWM control circuit for generating a high-side and a low-side driving signal according to the sensed signal and a feedback signal related to the output voltage. When the feedback signal falls below a low-power threshold, the resonant power converter enters a burst OFF period, during which both the high-side and the low-side transistors are turned OFF. A lower limit of the burst OFF period is equal to a switching period of the high-side and the low-side driving signals.

IPC Classes  ?

• H02M 3/00 - Conversion of DC power input into DC power output
• H02M 1/00 - Details of apparatus for conversion
• H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

A resonant power conversion circuit includes a resonant capacitor, a transformer, a high-side transistor, a low-side transistor, a first current detection circuit, an integrator, and a full-wave rectifying circuit. The resonant capacitor is coupled between a resonant node and a ground. The transformer includes a primary coil coupled between a switch node and the resonant node. The high-side transistor provides an input voltage to the switch node and the low-side transistor couples the switch node to the ground. The first current detection circuit generates a current detection signal based on a voltage of the resonant node. The integrator generates an integrating signal based on the current detection signal. The full-wave rectification circuit full-wave rectifies the integral signal to generate a rectified signal.

IPC Classes  ?

• H02M 3/00 - Conversion of DC power input into DC power output
• H02M 1/00 - Details of apparatus for conversion
• H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

The present disclosure provides a package structure. The package structure includes a lead frame, a first flip-chip disposed over the lead frame, a first dummy chip affixed on the first flip-chip by a non-conductive adhesive layer to serve as heat dissipation paths for the first flip-chip, and an encapsulant encapsulating the first flip-chip and the first dummy chip.

IPC Classes  ?

• H01L 23/36 - Selection of materials, or shaping, to facilitate cooling or heating, e.g. heat sinks
• H01L 23/00 - Details of semiconductor or other solid state devices
• H01L 23/31 - Encapsulation, e.g. encapsulating layers, coatings characterised by the arrangement
• H01L 23/42 - Fillings or auxiliary members in containers selected or arranged to facilitate heating or cooling
• H01L 25/065 - Assemblies consisting of a plurality of individual semiconductor or other solid-state devices all the devices being of a type provided for in a single subclass of subclasses , , , , or , e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group

Abstract

A resonant power converter includes a resonant capacitor, a transformer, a high-side transistor, a low-side transistor, a divider, a full-wave rectification device, a control circuit, and a rectifying circuit. The resonant capacitor is coupled between a resonant node and a ground. The transformer includes a primary coil coupled between a switch node and the resonant node and a secondary coil. The high-side transistor provides an input voltage to the switch node and the low-side transistor couples the switch node to the ground. The divider divides a voltage of the resonant node to generate a divided signal. The full-wave rectification device full-wave rectifies the divided signal to generate a full-wave rectified signal. The control circuit compares the full-wave rectified signal to a feedback voltage related to an output voltage to drive the high-side transistor and the low-side transistor. The rectifying circuit generates the output voltage.

IPC Classes  ?

• H02M 3/00 - Conversion of DC power input into DC power output
• H02M 1/38 - Means for preventing simultaneous conduction of switches
• H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
• H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode

Abstract

An intelligent power module includes: an encapsulating material structure; a lead frame which is at least partially encapsulated inside the encapsulating material structure, wherein all portions of the lead frame encapsulated inside the encapsulating material structure are at a same planar level; and a heat dissipation structure, which is connected to the lead frame.

IPC Classes  ?

• H01L 23/495 - Lead-frames
• H01L 21/48 - Manufacture or treatment of parts, e.g. containers, prior to assembly of the devices, using processes not provided for in a single one of the groups or
• H01L 21/56 - Encapsulations, e.g. encapsulating layers, coatings
• H01L 23/00 - Details of semiconductor or other solid state devices
• H01L 23/31 - Encapsulation, e.g. encapsulating layers, coatings characterised by the arrangement
• H01L 25/065 - Assemblies consisting of a plurality of individual semiconductor or other solid-state devices all the devices being of a type provided for in a single subclass of subclasses , , , , or , e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group

Abstract

A bias voltage generator includes an auxiliary winding, a switch circuit, an inductor, a diode, and a capacitor. The switch circuit is coupled to the auxiliary winding at a first node and controlled by a control signal. The inductor is coupled to the switch circuit at a second node and to a ground. The diode is coupled between the second node and a voltage output terminal. The capacitor is coupled between the voltage output terminal and the ground. In response to that the switch circuit is turned on, the inductor is charged by a charge current flowing the switch circuit and the auxiliary winding. In response to that the switch circuit is turned off, the inductor is discharged through a charge current flowing the diode and the capacitor. An output voltage is generated at the voltage output terminal. The second output voltage changes according to the control signal.

IPC Classes  ?

• H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
• H02M 1/088 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
• H02M 3/00 - Conversion of DC power input into DC power output

Abstract

A switching regulator includes: a power stage circuit configured to operably control a power switch therein according to a pulse width modulation signal to switch an inductor coupled to a phase node, so as to convert an input voltage to an output voltage; and a control circuit configured to operably determine an equivalent capacitance adjustment procedure to enter or sustain an enabled state according to a phase node voltage at the phase node at an inductor magnetization start time point in a discontinuous conduction mode (DCM) to adjust an equivalent capacitance at the phase node, so as to reduce a voltage across the power switch at another inductor magnetization start time point after the equivalent capacitance adjustment procedure.

IPC Classes  ?

• H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
• H02M 1/00 - Details of apparatus for conversion
• H02M 1/36 - Means for starting or stopping converters
• H02M 3/00 - Conversion of DC power input into DC power output

Abstract

A resonant power converter includes: a first and a second transistors, configured to form a half-bridge circuit; a resonant circuit including a resonant inductor, a primary winding of a transformer, and a resonant capacitor, which are serially coupled to each other, and wherein the first and the second transistors are configured to switch the resonant circuit to generate a resonant current for converting an input voltage into an output voltage; and a conversion control circuit configured to generate a ramp signal based on the resonant current, and to generate a first drive signal and a second drive signal based on the ramp signal and a compensation signal related to the output voltage. The first drive signal and the second drive signal are respectively used to control the first transistor and the second transistor. During a signal period of the ramp signal, the ramp signal monotonically increases or monotonically decreases.

IPC Classes  ?

• H02M 3/00 - Conversion of DC power input into DC power output
• H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

A pulse width modulation control circuit for controlling a power converter circuit includes: a main loop control circuit; and a light-load loop control circuit. The light-load loop control circuit includes a current synthesis circuit configured to generate a synthesized current signal according to an input voltage and a target value of an output voltage and an inductance value of an inductor in a power stage circuit of the power converter circuit. The light-load loop control circuit generates a pulse modulation signal in light-load mode according to the synthesized current signal, to control a duty ratio of the power stage circuit. In the light-load mode, the main loop control circuit enters a power-saving state to reduce the power consumption of the pulse width modulation control circuit. The power-saving state includes: reducing the power consumption of the current sense circuit or stopping the operation of the current sense circuit.

IPC Classes  ?

• H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
• H02M 1/00 - Details of apparatus for conversion
• H02M 3/157 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators with digital control

Abstract

A power converter includes a high-side transistor, a low-side transistor, a transformer, a first capacitor, a current detection circuit, a second capacitor, and a current detection resistor. The high-side transistor is coupled between an input voltage and a switching node. The low-side transistor is coupled between the switching node and a ground. The transformer includes a primary coil, and is coupled between the switching node and a first node. The first capacitor is coupled between the first node and the ground. The current detection circuit is connected in parallel with the first capacitor, and includes a second capacitor and a current detection resistor. The second capacitor is coupled to the first node. The current detection resistor is coupled between the second capacitor and the ground.

IPC Classes  ?

• H02M 1/00 - Details of apparatus for conversion
• G01R 19/00 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof
• H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

A power conversion and transmission system includes a power provider unit, a load unit and a cable. The power provider unit includes a power conversion circuit for converting an input power into an intermediate power, and a path switch coupled between the intermediate power and a bus power. The cable includes a power sub-cable, a communication sub-cable, and a ground sub-cable, for coupling the provider-end power, communication, and ground nodes of the power provider unit respectively to the corresponding nodes of the load unit. At an initial time point, voltage the of the provider-end communication node is sensed and recorded as the initial voltage level. At a determination time point, if the difference between the present voltage level of the provider-end communication node and the initial voltage level exceeds a threshold value, a power source limiting operation is initiated.

IPC Classes  ?

• H02M 1/32 - Means for protecting converters other than by automatic disconnection
• H02M 1/00 - Details of apparatus for conversion
• H02M 1/08 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters

Abstract

A class-D amplifier for generating an output signal having PWM according to an input signal based on a DC voltage during a normal mode (NM) includes: a first integrator for generating a first integrated signal by integrating the difference of the input signal and a feedback signal during the NM; a final-stage integrator for generating a final-stage integrated signal by integrating the first integrated signal during the NM; a superposition circuit for generating a loop filter signal by buffering the final-stage integrated signal during the NM; and a modulation and driving circuit for generating the output signal by comparing the loop filter signal and a triangle wave. During a clipping mode, the first integrator enters a reset or a hold state, and the final-stage integrator enters the hold state, and the superposition circuit is configured to superimposes the final-stage integrated signal and a feedforward signal to generate the loop filter signal.

IPC Classes  ?

• H03F 3/217 - Class D power amplifiersSwitching amplifiers

Abstract

A pre-bias voltage control circuit includes a flying capacitor, a voltage sensor, and a voltage controlled current source. The voltage sensor is used to generate a sensed capacitor voltage according to a capacitor voltage across the flying capacitor, and includes an inverting input terminal coupled to the flying capacitor, a non-inverting input terminal coupled to the flying capacitor, and an output terminal for outputting the sensed capacitor voltage. The voltage controlled current source is used to charge and discharge the flying capacitor, and includes a reference terminal for receiving a reference voltage, an input terminal coupled to the output terminal of the voltage sensor, a current output terminal coupled to the flying capacitor, and a current return terminal coupled to the flying capacitor. The voltage controlled current source generates a source current to charge the flying capacitor when the sensed capacitor voltage falls below the reference voltage.

IPC Classes  ?

• H02M 1/36 - Means for starting or stopping converters
• H02M 1/08 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
• H02M 3/07 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode
• H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
• H02M 1/32 - Means for protecting converters other than by automatic disconnection
• H02M 7/483 - Converters with outputs that each can have more than two voltage levels

Abstract

A chip package unit includes: a base material; at least one chip, disposed on the base material; a package material, enclosing the base material and the chip; and at least one heat dissipation paste curing layer, formed by curing the heat dissipation paste, on a top side of the package material or a back side of the chip in a printed pattern.

IPC Classes  ?

• H01L 23/34 - Arrangements for cooling, heating, ventilating or temperature compensation
• H01L 21/56 - Encapsulations, e.g. encapsulating layers, coatings
• H01L 23/31 - Encapsulation, e.g. encapsulating layers, coatings characterised by the arrangement

Abstract

A depletion type vertical discrete NMOS device includes: an N-type epitaxial layer formed on an N-type substrate, wherein the N-type epitaxial layer has a top surface and a bottom surface opposite to each other; a P-type well formed in the N-type epitaxial layer; a gate formed outside and connected with the N-type epitaxial layer; an N-type source formed in the N-type epitaxial layer and in contact with the P-type well; an N-type drain including a part of the N-type substrate, which is formed outside and under the N-type epitaxial layer; and an N-type region formed and connected between the P-type well and the gate, which provides a channel, such that the N-type source and the N-type drain are electrically connected with each other during conduction operation, whereas, the N-type source and the N-type drain are electrically disconnected from each other during non-conduction operation.

IPC Classes  ?

• H01L 29/78 - Field-effect transistors with field effect produced by an insulated gate
• H01L 21/265 - Bombardment with wave or particle radiation with high-energy radiation producing ion implantation
• H01L 29/40 - Electrodes
• H01L 29/66 - Types of semiconductor device

Abstract

A power supply system with power factor correction, includes: an AC rectifier, a power factor correction (PFC) conversion circuit, an asymmetric half-bridge (AHB) flyback converter and a communication protocol power delivery (PD) interface. When a power level of an adapter output power is lower than a power threshold, and a converted voltage of a converted power is higher than a first voltage threshold, the communication protocol PD interface generates a disable signal to disable a PFC conversion of the PFC conversion circuit, when the PFC conversion is disabled, the PFC conversion circuit operates a bypass coupling operation, as thus, the converted voltage is equal to a rectified voltage of a rectified power.

IPC Classes  ?

• H02M 1/42 - Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
• H02M 1/00 - Details of apparatus for conversion
• H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

A buck-boost switching power circuit comprises a bypass control circuit which configured to determine whether the buck-boost switching power circuit operates in a bypass mode according to a bypass enable signal. When the conversion voltage difference between the input voltage and the output voltage is less than a reference voltage, the bypass control circuit controls to electrically connect the input power source with the output power source, and operates the buck-boost switching power circuit in the bypass phase of the bypass mode. Before and/or after the bypass phase, the bypass control circuit respectively controls the buck-boost switching power circuit to operate in a first transition phase and/or a second transition phase. During the first transition phase or the second transition phase, the bypass control circuit controls the output voltage to gradually change towards the input voltage or target voltage, until the conversion voltage difference is less than the first reference voltage or the output voltage equals the target voltage.

IPC Classes  ?

• H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
• H02M 1/00 - Details of apparatus for conversion