An electrostatic discharge semiconductor device and a manufacturing method thereof are disclosed. The electrostatic discharge semiconductor device includes: a substrate, an epitaxial layer and a first well region; a second well region and a third well region located on sides of the first well region respectively; a fourth well region extending in the first well region; fifth and sixth well regions on sides of the fourth well region; a first injection region and a second injection region. The second injection region in the second well region and third well region, and the first injection region in the fifth well region and sixth well region are connected to a cathode, and all injection regions in the fourth well region are connected to an anode, to form a lateral triode current discharge path, which increases the holding voltage and adjusts the avalanche breakdown voltage and trigger voltage, and enhances electrostatic protection capability.
H10D 89/60 - Integrated devices comprising arrangements for electrical or thermal protection, e.g. protection circuits against electrostatic discharge [ESD]
H10D 84/60 - 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 BJTs
2.
ELECTROSTATIC DISCHARGE SEMICONDUCTOR DEVICE AND MANUFACTURING METHOD THEREOF
An electrostatic discharge semiconductor device is disclosed and comprises: a first well region of a first doping type, extending from the surface of an epitaxial layer to the surface of the substrate; a second well region and a third well region of a second doping type; a fourth well region of the second doping type; a fifth well region and a sixth well region have a first doping type; a first injection region and a second injection region, spaced apart in each well region. The second injection region in the second and third well regions is connected to a cathode, and the first and second injection regions in the fourth well region are connected to an anode. The electrostatic discharge semiconductor device enhances its electrostatic protection capability by adjusting the avalanche breakdown voltage between the floating fifth and sixth well regions and the triggering voltage of the device.
H10D 89/60 - Integrated devices comprising arrangements for electrical or thermal protection, e.g. protection circuits against electrostatic discharge [ESD]
H10D 84/60 - 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 BJTs
3.
ILLUMINATION DRIVER CIRCUIT COMPATIBLE WITH ELECTRONIC BALLAST AND MAINS SUPPLY, AND ILLUMINATION DEVICE
An illumination driver circuit compatible with an electronic ballast and a mains supply are provided. By detecting a frequency of a signal of an input terminal, a constant current controller recognizes the mains supply and the electronic ballast. When the input terminal is an input of the mains supply, the constant current controller enables a detection result of a leakage protection module, and according to the detection result, the constant current controller controls a power switching transistor to work in an off mode or an on/off mode. When the input terminal is an input of the electronic ballast, the constant current controller controls the power switching transistor to work in a through mode. Through the illumination driver circuit, the detection of the electronic ballast and the detection of the leakage protection module can be performed at the same time.
H05B 45/50 - Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDsCircuit arrangements for operating light-emitting diodes [LED] responsive to LED lifeProtective circuits
H05B 47/17 - Operational modes, e.g. switching from manual to automatic mode or prohibiting specific operations
4.
MULTI-OUTPUT SWITCHING POWER SUPPLY AND CONTROL METHOD THEREOF
This application discloses a multi-output switching power supply and a control method thereof. The multi-output switching power supply comprises a power conversion circuit and plurality of output control transistors. The plurality of output control transistors are connected to the output terminal of the power conversion circuit. The power conversion circuit converts an input voltage into a first output voltage, and the plurality of output control transistors regulate the first output voltage into multiple voltage; the switching state of the main transistor in the power conversion circuit is controlled based on the feedback signal of an output terminal, and the switching state of plurality of output control transistors is controlled based on the output feedback signals of other output terminals. The plurality of output control solution of the present application does not require a two-stage power conversion circuit, and it has low cost, simple control, thus greatly improving system efficiency.
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
An electro-static discharge (ESD) protection apparatus is connected to a pin of a chip, and includes: an ESD protective semiconductor device including a drain electrode connected to the pin and a source electrode connected to a reference ground, and configured to discharge a current on the pin; and a comparator circuit, connected between the pin and a gate electrode of the ESD protective semiconductor device, and configured to: acquire a voltage on the pin to obtain a voltage signal, compare the voltage signal with a reference signal of a negative voltage, and control an on-state of the ESD protective semiconductor device according to a comparison result. When the voltage signal is less than the reference signal, a channel between the source electrode and the drain electrode of the ESD protective semiconductor device is opened by the comparator circuit.
H10D 89/60 - Integrated devices comprising arrangements for electrical or thermal protection, e.g. protection circuits against electrostatic discharge [ESD]
6.
AFE CHIP WITH SYNCHRONOUS VOLTAGE SAMPLING AND BATTERY MANAGEMENT SYSTEM
An AFE chip has synchronous voltage sampling function and a battery management system. N AFE chips are coupled respectively with n battery units, and are cascaded in a daisy chain. The i-th AFE chip calculates an i-th delay time tdi according to the time point tit when it transmits first broadcast command information and the time point tir when it receives response information, and according to a first time T1 that represents a time difference between the time point tn′ when the n-th AFE chip receives the first broadcast command information and the time point tnt when it transmits the response information. The i-th AFE chip executes second broadcast command information, after it receives the second broadcast command information and delays for the i-th delay time tdi; and the n-th AFE chip executes the second broadcast command information at the time point when receiving the second broadcast command information.
H01M 10/42 - Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
H01M 10/48 - Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
7.
FREQUENCY REGULATION CIRCUIT, REGULATION METHOD FOR SWITCHING POWER SUPPLY AND SWITCHING POWER SUPPLY
The present application discloses a frequency regulation circuit and a regulation method for a switching power supply, and a switching power supply. By the regulation of a light load regulation circuit, in the discontinuous working mode, when the main power transistor and the freewheeling transistor are both turned off for a time exceeding a preset time, the freewheeling transistor is turned on to increase system frequency and system noise is reduced; moreover, the on time of the freewheeling transistor is regulated by the feedback of the output voltage, resulting in stable system frequency, stable output voltage, and low system loss.
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
The present application provides a power converter and a current comparison circuit, in which a judgment module and a selector are set to select one of the inductor current detection signal or the current reconstruction signal with a predetermined slope of the power converter according to the DC input voltage and DC output voltage of the power converter as a detection signal, and a comparison signal for adjusting the duty cycle of the switching control signal of the power converter is generated by comparing the detection signal with the first reference voltage, so that the inductor current information of the system can be accurately obtained under different duty cycles of the switching control signal, which facilitates accurate control of the system and improves output quality, and is easy to implement and cost-effective.
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 1/08 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
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
9.
CONTROL CIRCUIT WITH HIGH-VOLTAGE STARTUP FUNCTION AND SWITCHING POWER SUPPLY
Disclosed is a control circuit with a high-voltage startup function and a switching power supply, wherein the control circuit is provided with a startup power supply circuit, a power control circuit and a high-voltage switch device, the high-voltage switch device is configured to implement charging startup of the control circuit in a startup stage through a first current path which is provided by the startup power supply circuit, and to implement power conversion of the switching power supply through a second current path provided by the power control circuit after the startup is completed, thereby achieving time-sharing multiplexing of the high-voltage switch device, reducing the number of the high-voltage switch device in the control circuit, and reducing the static power consumption of the system while simplifying the system.
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 1/36 - Means for starting or stopping converters
A power grid switching circuit and a circuit system are provided. An on-off control module is configured to control safe on/off of a transistor switch module. Specifically, the on-off control module is configured to control the transistor switch module to turn off at a zero current and turn on at a zero voltage. In this way, the switching of a power grid and an electrical device is more intelligent and unrestricted in frequency. The power grid switching circuit is safe, highly efficient, and meets the intelligent, high-frequency, and easy-to-operate requirements of modern home control.
H02J 3/00 - Circuit arrangements for ac mains or ac distribution networks
H02J 3/14 - Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
11.
CONTROL METHOD FOR SWITCHING POWER SUPPLY AND SWITCHING POWER SUPPLY
The present disclosure provides a control method for a switching power supply and the switching power supply. The switching power supply rectifies an AC voltage to obtain an input voltage. The switching power supply comprises: a front PFC converter and a front controller, and the front controller is used to control the front PFC converter to convert the input voltage into a bus voltage; a post converter and a post controller, wherein the post controller controls the post converter to convert the bus voltage into an output voltage; wherein, the magnitude of the bus voltage is adjusted based on the output voltage and output power. The present disclosure can optimize system efficiency and standby power consumption.
H02M 7/219 - 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 in a bridge configuration
Disclosed is a flyback converter and a control method thereof. The flyback converter includes a first switching transistor, a second switching transistor, a transformer, a first capacitor, a power supply device. A resonant loop circuit is formed by connecting the first capacitor to a primary side winding of the transformer and the second switching transistor. In a first operating mode, a controllable switching transistor of the power supply device is turned on before the second switching transistor is turned off, and after the second switching transistor is turned off, the charging capacitor is charged and stores energy. In a second operating mode, before the first switching is turned on, the controllable switching transistor is turned on, and the charging capacitor is charged and stores energy. The conversion efficiency of the power supply is enhanced while enabling the first switching transistor to operate under zero voltage switching, thereby reducing switching losses.
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
A daisy chain communication system and method, and a battery management system are provided. The daisy chain includes a first slave controller and a plurality of second slave controllers, and a master controller transmits command information to the plurality of second slave controllers through the first slave controller. The daisy chain responses to the command information. A network response period is divided into a plurality of sub phases. The second slave controller transmits transmission data with a consistent data length to a slave controller of an upstream node cascaded therewith at each sub phase; the first slave controller transmits the transmission data from the second slave controller cascaded therewith at each sub phase to the master controller. In the present disclosure, a data length transmitted by each slave controller is consistent, so that equalization of power consumption between corresponding battery modules that supply power to each slave controller is achieved.
A lighting circuit and a control method thereof are provided. The lighting circuit includes a triac dimmer connected between an alternating current (AC) input power supply and a rectifier circuit, where the rectifier circuit is configured to output a bus voltage after phase cutting, and further includes a turn-on angle detection circuit configured to detect a turn-on state of the triac dimmer and output a first detection signal that represents a relationship between a turn-on angle of the triac dimmer and a first angle, and a bleeder circuit connected to the rectifier circuit and configured to control turn-off time of the bleeder circuit based on the first detection signal and a sampling signal representing a current of a light-emitting diode (LED) load.
H05B 45/10 - Controlling the intensity of the light
H05B 45/3575 - Emulating the electrical or functional characteristics of incandescent lamps by means of dummy loads or bleeder circuits, e.g. for dimmers
A control circuit generates a set signal based on an output voltage and a reference voltage signal, a total output current and a reference current signal, and each sub-control circuit receives the set signal; a next sub-control circuit receives an enable signal generated by its previous sub-control circuit, and generates a corresponding switch control signal and an enable signal acting on its next sub-control circuit to control the corresponding switch circuit to turn on or turn off based on the received enable signal and the set signal. The present disclosure can control sequential conduction of the plurality of switch circuits through the signal transmission among the multiple sub-control circuits, and can implement overcurrent protection when the total output current is overcurrent, and implement the control of the switch circuit when the total output current is not overcurrent based on the comparison of the output voltage and the reference voltage signal.
The provided is an on-time generator circuit and a switching converter. The on-time generator circuit includes a ramp module configured to generate a ramp signal based on a drive signal of a main power transistor and an input voltage; a compensation module configured to generate a compensation signal based on the input voltage and a duty cycle; and a timing signal generation module configured to generate a timing signal based on the ramp signal, the compensation signal, and an output feedback signal. The compensation signal is used to offset delay time generated by the timing signal, making turn-on time (Ton) be preset Ton corresponding to the duty cycle, and keeping a switching frequency constant at different duty cycles.
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
The present disclosure provides an error amplifier, a switching converter, and a control method of the error amplifier. The error amplifier includes: an operation module for outputting a regulation signal according to a difference between a feedback voltage and a reference voltage, wherein the feedback voltage represents an output voltage of the switching converter, and the regulation signal is used to regulate an output current of the switching converter; a regulation module for regulating a transconductance of the operation module according to an absolute value of the difference between the feedback voltage and the reference voltage or an absolute value of the regulation signal. When an output of the switching converter changes greatly, the transconductance of the error amplifier is increased in real time, thereby a bandwidth is increased to achieve a fast response of the switching converter. The switching converter has high stability when the output is normal.
The present disclosure provides a cascade communication device and method and a battery management system. The cascade communication device includes: a first interface for received data in uplink mode and transmitting data in downlink mode, and receiving a first clock signal; a second interface for transmitting data in uplink mode and received data in downlink mode, and transmitting a second clock signal; an edge detection module for detecting an edge of the first clock signal; a clock generation module for generating the second clock signal according to the edge of the first clock signal; a data processing module for reconstructing a received data according to the first clock signal and the second clock signal to generate a transmission data. The cascade communication system includes a serial synchronous interface based on the public protocol, the reliability of multi-stage data transmission is improved, and a greater number of node devices is supported.
H04L 7/033 - Speed or phase control by the received code signals, the signals containing no special synchronisation information using the transitions of the received signal to control the phase of the synchronising-signal- generating means, e.g. using a phase-locked loop
H03L 7/081 - Details of the phase-locked loop provided with an additional controlled phase shifter
H03L 7/089 - Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal the phase or frequency detector generating up-down pulses
The present application discloses a switch converter, and the switch converter comprises a first switch transistor, a second switch transistor, and an inductor, and further comprises: an acquisition unit for acquiring voltage of at least one end of the inductor, to obtain a first sampling signal and a second sampling signal; an operation unit, to obtain a current sampling signal based on the first sampling signal and the second sampling signal. The current sampling method in the switch converter of the present disclosure is simple, not easily affected by noise interference, and it has low requirements for devices, and adapts to different converters.
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
20.
POWER CONVERTER AND SLOPE SIGNAL GENERATOR AND SLOPE SIGNAL GENERATION METHOD THEREOF
This disclosure relates to a power converter, a slope signal generator and a slope signal generation method thereof. The power converter comprises an inductor and a switch transistor coupled between the input terminal and the output terminal. The slope signal generator comprises: a proportion transformation circuit, for performing proportion transformation on the current sense signal of the inductor to obtain a replicated signal; and an offset compensation circuit, for performing offset compensation on the replicated signal to obtain a slope signal, wherein the slope change of the slope signal characterizes the inductance value change of the inductor. The slope signal generator of the power converter can adaptively adjust the slope of the slope signal during the switching cycle, dynamically compensate for the fluctuation of the inductance value, improve the effect of suppressing subharmonic oscillation, thus enhancing the input and output voltage range and stability of the power converter.
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 1/08 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
H02M 1/14 - Arrangements for reducing ripples from DC input or output
Disclosed in the present application is a control solution for an emergency light. An alternating-current input voltage supplies power to a lighting load by means of a power supply apparatus, the power supply apparatus comprising a voltage conversion circuit and a battery, wherein the voltage conversion circuit receives the alternating-current input voltage to supply power to a light and charge the battery. In the case where there is no alternating-current input voltage, when an emergency light is required to keep lighting, power is supplied to the emergency light by means of the battery. A discharging circuit is connected to at least one input end of the alternating-current input voltage, so as to discharge the voltage of an alternating-current input end. In the present application, the voltage of an alternating-current input end is discharged by means of a discharging circuit, such that a system can accurately determine whether there is an alternating-current input, so as to control an internal battery to start emergency lighting, thereby ensuring the smooth turning-on of an emergency light in some specific occasions.
H05B 47/105 - Controlling the light source in response to determined parameters
H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
H02J 7/02 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters
H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over
22.
POWER CONVERTER ADOPTING HYBRID MODULATION AND CONTROL CIRCUIT AND CONTROL METHOD THEREOF
The present disclosure relates to a power converter adopting hybrid modulation and a control circuit and a control method thereof. The control circuit includes: a loop compensation unit for obtaining a compensation amount for a switching control signal according to a voltage feedback signal of an output voltage; a switching cycle calculation unit for allocating the compensation amount as a switching cycle compensation amount according to a first preset weight; an on-time calculation unit for allocating the compensation amount as an on-time compensation amount according to a second preset weight; and a hybrid modulator for generating the switching control signal according to the switching cycle compensation amount and the on-time compensation amount. The control circuit modulates the on-time and switching cycle of the switching control signal based on the preset weights, respectively, so as to improve circuit stability, improve circuit dynamic response speed and reduce electromagnetic interference.
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
23.
FLYBACK CONVERTER AND SWITCH CONTROL CIRCUIT, CONTROL METHOD THEREOF
Disclosed is a flyback converter, a switch control circuit and a control method thereof. A driving current regulation circuit generates a current regulation trigger signal at active state correspondingly according to an operating state of the flyback converter. A switch control driving unit regulates a driving current of the first switch transistor according to the current regulation trigger signal at active state, thus a variation rate of a drain-source voltage across the first switch transistor is slowed down to a preset range. According to the present disclosure, when it is detected that the flyback converter is operating in discontinuous conduction mode or the drain-source voltage across the first switch transistor is high, a switching rate of the first switch transistor is controlled to avoid the voltage across a rectifier switch transistor on a secondary side of the flyback converter to undergo a large jump, and the system EMI is good.
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
The present application relates to a flyback switch converter and a control circuit thereof; the control circuit comprises: a control signal generation module for providing a first control signal; a driver, for supplying a first switch transistor with a first driving signal according to the first control signal, so as to control the turning-on and off of the first switch transistor; the driver is further for performing overcurrent detection according to the voltage drop across the first switch transistor when the flyback switch converter performs the power output, and supplying a resonant capacitor with a discharge path when the flyback switch converter is shut down or enters the protection state. The present application can discharge residual charges on the resonant capacitor when the system is shut down or enters the protection state, and the system is less complex and with lower cost.
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 1/32 - Means for protecting converters other than by automatic disconnection
H02M 3/00 - Conversion of DC power input into DC power output
25.
POWER SUPPLY SYSTEM CONTROL METHOD AND POWER SUPPLY SYSTEM
A power supply system control method and a power supply system are provided. The control method includes: controlling a power supply system to enter a first mode based on a power parameter, a temperature parameter, and an electric quantity parameter; and during the first mode, controlling a first regulating circuit to regulate a second switching circuit such that an input voltage of the load module is adjusted to a target voltage, and controlling a first voltage loop to regulate a first switching circuit based on the power parameter, to stabilize an output voltage of a solar cell at a first threshold voltage, where the first threshold voltage is close to an output voltage corresponding to maximum output power of the solar cell.
H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
H02J 3/14 - Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
H02J 3/28 - Arrangements for balancing the load in a network by storage of energy
H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
H02J 7/35 - Parallel operation in networks using both storage and other DC sources, e.g. providing buffering with light sensitive cells
26.
ASYMMETRIC HALF-BRIDGE FLYBACK CONVERTER AND CONTROL METHOD THEREOF
Disclosed is an asymmetric half-bridge flyback converter and a control method, comprising: in an initial switching cycle of the asymmetric half-bridge flyback converter, obtaining a pre-turnoff time of the second switch transistor, and controlling the second switch transistor to be turned off after a delay which lasts for a first time and starts at the pre-turnoff time of the second switch transistor; in a non-initial switching cycle of the asymmetric half-bridge flyback converter, obtaining a judgment result by judging whether the first switch transistor is operated with zero-voltage switching in a current switching cycle, and adjusting a length of the first time based on the judgment result. The present disclosure can realize zero-voltage switching of the asymmetric half-bridge flyback converter, and at the same time, satisfy a requirement for achieving more ideal dead-time setting under a wider range of input voltage and a wider range of output voltage.
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
The present application discloses a driving control circuit of a power transistor, a lighting control circuit and a lighting circuit. The control circuit includes a protocol conversion circuit and a driving regulation circuit. The protocol conversion circuit stores received input data signal as multi-channel digital signals and converts the multi-channel digital signals into a plurality of regulation parameters. The driving regulation circuit adjusts the driving current and driving voltage of the power transistor according to a plurality of regulation parameters so as to match various types of power transistors. The control circuit according to the present disclosure converts the input data signal into a plurality of regulation parameters, adjusts the driving current and driving voltage of the power transistor to match various types of power transistors, and improves driving capability, compatibility, and adaptability of the circuit.
The present application discloses a lighting control circuit, a lighting control method, and a lighting circuit. The lighting control circuit includes at least a protocol conversion circuit, and a driving signal generation circuit. The dimming selection circuit stores an input data signal as multi-channel digital signals. The driving signal generation circuit controls an off time of a main power transistor according to a first dimming signal derived from the multi-channel digital signals in a first dimming mode, and controls an off time of the main power transistor according to a reference signal derived from the multi-channel digital signals and an output feedback signal in a second dimming mode. The lighting control circuit according to the present disclosure stores the input data signal as multi-channel digital signals, and the circuit can be configured with different dimming modes according to the protocol alone to improve the circuit flexibility.
The present application discloses a switching frequency synchronization circuit, a method therefor and a switching power supply. By comparing peak values of a second charging voltage signal which represents an internal clock signal and a first charging voltage signal which represents an external clock signal, it is determined whether the frequency of the external clock signal meets the requirement for frequency synchronization. In a case that the frequency meets the requirement, the second charging voltage signal is reset by the external clock signal to synchronize the frequency of the internal clock signal with the frequency of the external clock signal. The present disclosure does not need a complex phase-locked loop circuit, and adjust an internal clock frequency by simple voltage comparison and synchronization mode. The control circuit is simplified and the overall system cost is reduced.
H03L 7/00 - Automatic control of frequency or phaseSynchronisation
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
H03K 5/22 - Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral
30.
SWITCH DRIVE INTEGRATED CIRCUIT AND SWITCH DRIVE SETTING METHOD
Provided in the present invention are a switch drive integrated circuit and a switch drive setting method. A first signal and a second signal are enabled at different moments, such that a voltage control signal generation module or a current control signal generation module generates different voltages or different currents under the enabling effects of different signals; and a power transistor drive current generation module can generate a pull-up drive current and a pull-down drive current of a power transistor on the basis of the different voltages or different currents. In the present invention, different voltages or different currents are all generated on the basis of an external resistor network module, such that the magnitudes of a pull-up drive current and a pull-down drive current of a power transistor can be adjusted by means of adjusting the resistance value of a resistor of the external resistor network module. Compared with the prior art, the present invention can realize the adjustment of a pull-up drive current of a power transistor simply by means of one pin, and can also realize the adjustment of a pull-down drive current of the power transistor, such that the number of pins can be reduced.
Disclosed are an electrostatic discharge semiconductor device and a manufacturing method therefor, and an integrated circuit. The electrostatic discharge semiconductor device comprises: a substrate; a first N-type well region and a drift region which are transversely distributed on the upper portion of the substrate; a P-type well region and a second N-type well region, which are in contact and are distributed on the side of the upper portion of the drift region away from the first N-type well region; a first N+ implantation region and a first P+ implantation region, located on the side in the first N-type well region away from the drift region; a second P+ implantation region and a second N+ implantation region, respectively located in the P-type well region and the second N-type well region; a plurality of field oxide layers, located on the surface of the substrate and successively separating the first N+ implantation region, the first P+ implantation region, the second P+ implantation region and the second N+ implantation region; and a gate oxide layer and a polycrystalline silicon layer which are successively stacked on the surface of the substrate, the second P+ implantation region stretching across the P-type well region and the second N-type well region. Under an electrostatic pulse, a parasitic triode is first turned on, and then a silicon controlled rectifier discharge path is formed, allowing the device to have strong electrostatic protection capability and high robustness.
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
32.
ELECTRONIC FUSE CIRCUIT AND CIRCUIT SYSTEM USING THE SAME
The present application discloses an electronic fuse circuit and a circuit system using the same. During startup operation, the circuit system using the electronic fuse circuit of the present application detects an amplitude of the load voltage by a second protection circuit, when the voltage exceeds a set second threshold signal, the electronic fuse circuit is controlled to be turned off; during normal operation, a current of a path where the electronic switch is located is monitored by a first protection circuit to prevent a current of the circuit system from overcurrent. According to the technical solution of the present disclosure, the load can be prevented from damage caused by a failure such as short circuit and electricity leakage of the switch power supply, and the system can be protected from overcurrent.
H02H 3/20 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to excess voltage
H02H 3/087 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to excess current for DC applications
H02H 7/12 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for convertersEmergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for rectifiers for static converters or rectifiers
33.
POWER CONVERSION CIRCUIT FOR QUICK RESPONSE AND SWITCHING POWER SUPPLY
Disclosed is a power conversion circuit for quick response and a switching power supply, wherein an error compensation signal is obtained according to a sampled signal representing an output feedback signal or an average current through the inductor. A PWM control signal is generated according to the error compensation signal, a ramp signal, and a proportional signal, and is used to control switching operations of a main power switch transistor, the proportional signal is proportional to an input voltage or/and an output voltage, thus the system can quickly respond to transient change of the input voltage or the output signal and provide stable output. Output voltage information or/and input voltage information can be fed back to a control loop, thus the system can quickly obtain a switching duty cycle which allows the system to operate in a state close to steady, and dynamic response speed of the system is fast.
Disclosed is an operational amplifier circuit and a switching circuit. The operational amplifier circuit comprises a main operational amplifier, which performs operational amplification based on a reference signal and a feedback signal of an output voltage of the switching circuit to obtain an operational amplification signal for controlling a switching state of the switching circuit, and generates an adjustment signal according to the feedback signal, the reference signal, and a preset first voltage. When a load of the switching circuit is reduced, an output terminal of the main operational amplifier receives the adjustment signal and obtains an adjusted operational amplification signal, and the adjustment signal is used for suppressing a change of the operational amplification signal. The operational amplification signal can be self-adaptively adjusted when the load is reduced, without detecting load change, thus the operational amplification signal can be quickly restored, the switching circuit has better output characteristics.
Disclosed is a high-efficiency flyback converter and a control method thereof. The flyback converter comprises: a transformer; a first switch transistor and a second switch transistor; a resonant capacitor; a control circuit, for controlling the second switch transistor to be turned on for a first time before the first switch transistor is turned on during a switching cycle, controlling the second switch transistor to maintain turn-off state during a first time stage, to control energy transmission between primary and secondary sides to include two time stages during a switching cycle, the first time stage lasts for a set time period during a freewheeling process. The present disclosure allows the main switch transistor to realize zero-voltage turn-on, thus reducing conduction loss of the primary and the secondary sides, reducing ripples of an output voltage and a current of the secondary side, and being beneficial to improving operating efficiency.
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
36.
Soft Switch Control Circuit of Flyback Converter and Flyback Converter Applying the Same
Disclosed is a soft switch control circuit and a flyback converter, comprising a primary edge part and a secondary edge part, and obtaining a trigger pulse signal according to a pre-turning on signal of a main switch transistor before the main switch transistor is turned on. The trigger pulse signal is transmitted to the secondary edge part by an isolation module to control the switch at a secondary edge circuit to conduct, to reduce source-drain voltage of the main switch circuit of the primary edge, to make the main switch transistor to turn on when the source-drain voltage is near zero voltage. The switch of the secondary edge circuit is a synchronous rectifying switch transistor or a discharge switch transistor connected at two ends of the synchronous rectifying switch transistor.
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
The present disclosure relates to a buck-boost converter and a control method therefor. The buck-boost converter includes a boost unit and a buck unit. The boost unit has a first capacitor and a first group of switches. The buck unit has an inductor and a second group of switches. The buck-boost converter has a cascaded structure of the boost unit and the buck unit to achieve multiple voltage conversion modes. The inductor of the buck unit is coupled to the output terminal. Therefore, not only can it achieve a smooth transition of the DC output voltage, but also reduce voltage ripple and improve dynamic response speed.
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 1/14 - Arrangements for reducing ripples from DC input or output
H02M 1/38 - Means for preventing simultaneous conduction of switches
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
38.
Protection Circuit of Flyback Converter and Control Method
Disclosed is a protection circuit of a flyback converter and a control method. The protection circuit comprises: an active discharge module, connected to at least one end of a first capacitor in a resonance circuit of the flyback converter to provide a discharge path, and controlling turning-on and turning-off of the discharge path according to the discharge enable signal; in a normal work state, the discharge path is disconnected, the first capacitor works as a resonance capacitor; before the flyback converter is restarted, the discharge path is turned on for a predetermined time period to release charges of the first capacitor, a resonance current after the flyback converter is restarted is reduced to a safe work current of the second switch transistor. Charges stored in the first capacitor can be discharged to release before the flyback converter is restarted to reduce the resonance current and enhance system stability and security.
H02M 1/32 - Means for protecting converters other than by automatic disconnection
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
39.
Protection Circuit of Flyback Converter and Control Method
Disclosed is a protection circuit of a flyback converter and a control method. The protection circuit comprises: an active discharge module, for providing a discharge path between a first current terminal and a second current terminal of a switch transistor in a resonance circuit, and controlling turning-on and turning-off of the discharge path according to a discharge enable signal; in the normal work state of the flyback converter, the discharge path is disconnected, the resonance circuit works, before the flyback converter is restarted, the discharge path is turned on for a predetermined time period to release charges stored in the resonance circuit, and the resonance current after the flyback converter is restarted is reduced to the safe work current of the second switch transistor. The resonance current is discharged before the flyback converter is restarted, thus reducing the resonance current and enhancing system stability and security.
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 1/32 - Means for protecting converters other than by automatic disconnection
A supply circuit and a switched mode power supply (SMPS) are provided. The supply circuit includes a first capacitor, a second capacitor, and a charging-discharging control circuit; the first capacitor includes a first terminal connected to a switching node, and a second terminal for providing a first supply voltage; the second capacitor includes a first terminal connected to a reference ground or a first potential terminal under control of the charging-discharging control circuit, and a second terminal for providing a second supply voltage; and according to a charging-discharging enable signal, the charging-discharging control circuit charges the second capacitor in a first time period and discharges the second capacitor in a second time period.
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 1/36 - Means for starting or stopping converters
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
41.
Fast-Response Switch Power Supply Control Circuit and Control Method Thereof
The present application discloses a fast-response switch power supply control circuit and a control method thereof. A triangular wave signal associated with inductor current information is obtained by a triangular wave generation circuit; the triangular wave signal is calculated with an error compensation signal by the capacitor circuit to obtain a first compensation signal; a comparator compares the first compensation signal with an output voltage feedback signal to obtain a comparison result to control the turning-on of the power switch transistor. The present application has the beneficial effects of good loop stability and fast dynamic response of the system without requiring a sampling circuit to sample the inductor current information in the case of using a relatively simple circuit.
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
The present disclosure provides a package structure and a package method for a power converter. The package structure includes at least one power device die and a control circuit die. The at least one power device die includes a first pad area and a support area on a first surface, and a second pad area on a second surface, wherein the first surface and the second surface are opposite each other. The control circuit die is on the support area of the at least one power device die. The package structure uses at least one power device die on the first surface to provide the support area to form a stacked structure, so as to reduce a chip area of the package structure and improve voltage resistance and heat dissipation performance of the chip.
H01L 23/00 - Details of semiconductor or other solid state devices
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
H01L 23/31 - Encapsulation, e.g. encapsulating layers, coatings characterised by the arrangement
43.
DROPOUT VOLTAGE GENERATION CIRCUIT, SWITCHING POWER SUPPLY AND DROPOUT VOLTAGE GENERATION METHOD
The present disclosure provides a dropout voltage generation circuit, a switching power supply and a dropout voltage generation method. The circuit includes a reference current generation unit, a first regulation unit and a second regulation unit. The reference current generation unit is configured to generate a plurality of reference currents according to the output current of the switching power supply. The first regulation unit is configured to generate a regulation current according to a first regulation code and the plurality of reference currents. The second regulation unit is configured to generate the dropout voltage according to a second regulation code and the regulation current, wherein the first regulation code and the second regulation code can be configured at least according to a target value of load line resistance. The present disclosure achieves higher accuracy and wider range of regulation of load line resistance with adjustable gain.
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
A light source driving circuit and a communication device for display system are provided. The communication device includes a control unit and at least one string light source driving circuit. The control unit includes an output interface for transmitting control commands or data and a data reading back input interface. Each string light source driving circuit includes a plurality of light source driving circuits, and each light source driving circuit interface includes a serial input interface, a serial output interface, parallel interfaces, and at least one current output interface. The serial input interface and serial output interface of the plurality of light source driving circuits are cascaded with each other as a first channel of the control commands or data transmission. The parallel interfaces of each driving circuit in the plurality of driving circuits are coupled with each other as a second channel of the control commands and data transmission.
G09G 3/34 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix by control of light from an independent source
G09G 3/20 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix
G09G 3/36 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix by control of light from an independent source using liquid crystals
45.
Control circuit and control method for switched capacitor converter
A control circuit and control method for a switched capacitor converter (SCC) are provided. An adjustment circuit makes adjustment with a small pull-down current, such that two terminal voltages of a flying capacitor are consistent with an output voltage. Before the SCC works formally for voltage conversion, the two terminal voltages of the flying capacitor are the same as the output voltage.
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 1/088 - 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
46.
Light source driving circuit and communication device for display system
A light source driving circuit and a communication device for a display system are provided. The communication device includes a control unit and at least one string light source driving circuit. The control unit includes an output interface for transmitting the control commands or data and a reading back data input interface. Each string light source driving circuit includes a plurality of light source driving circuits. The control unit transmits the control commands or data to the first light source driving circuit of each string light source driving circuit through the output interface. The first driving circuit takes out the commands or data required at the current stage after receiving the control command or data, and then repackages the commands or data of the remaining driving circuits, and transmits the repackaged data packet through the serial output interface and the parallel interfaces or the parallel interfaces.
G09G 3/34 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix by control of light from an independent source
G09G 3/20 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix
G09G 3/36 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix by control of light from an independent source using liquid crystals
47.
CONTROL CIRCUIT AND CONTROL METHOD FOR MULTIPHASE POWER SUPPLY AND MULTIPHASE POWER SUPPLY
The present disclosure discloses a control circuit and a control method for a multiphase power supply and the multiphase power supply. The control circuit includes a current reference signal generator and a controller. The current reference signal generator is configured to adjust a first compensation signal according to a first scaling factor and a first voltage signal, so that the first compensation signal follows the first voltage signal in a steady state, and a current reference signal is obtained according to the first compensation signal and the first voltage signal. The controller is configured to obtain a control signal for each phase power conversion circuit according to the current reference signal to control each phase power conversion circuit to provide a power output to a load. The present disclosure can improve a phase-conversion stability of the multiphase power supply, and can achieve fast and accurate control of the multiphase power supply.
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 1/088 - 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 1/14 - Arrangements for reducing ripples from DC input or output
48.
Power supply circuit and light-emitting diode (LED) driving system using power supply circuit
A power supply circuit and a light-emitting diode (LED) driving system using the power supply circuit are provided. The power supply circuit includes a linear conversion circuit, a first capacitor, and a direct current-direct current (DC-DC) conversion circuit, where an alternating current input signal is rectified to form a first rectified voltage. The linear conversion circuit receives the first rectified voltage and has an output terminal connected to the first capacitor. After the power supply circuit is started, the linear conversion circuit controls the first rectified voltage to charge the first capacitor in a time period when the first rectified voltage is near a trough. The DC-DC conversion circuit receives a first capacitor voltage and performs power conversion to output a supply voltage. At least part of the linear conversion circuit and at least part of the DC-DC conversion circuit can be integrated with an LED driving circuit.
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
A dimming method and a dimming circuit for driving LED load are provided. The dimming circuit includes a power stage circuit, and the power stage circuit includes a power switch transistor. After the power stage circuit enters the DCM working mode, it obtains a first integral value according to the inductance current in a switch period of the power switch transistor, and obtains second time according to the first integral value and a duty cycle of a PWM dimming signal; when the switch period reaches the second time, the power switch transistor is controlled to be turned on to start the next switch period; a first upper limit voltage is set to a fixed voltage; the power switch transistor is controlled to be turned off when a sampling signal of the inductance current representing the inductance current of the power stage circuit reaches the first upper limit voltage.
The present disclosure relates to a switching power supply, and a control circuit and a control method of the switching power supply. The switching power supply comprises N-phase power conversion circuits, N being an integer greater than or equal to 1. The control circuit comprises a current reference signal generating means and a control means. The current reference signal generating means is configured to obtain an integration signal by integrating an error between a first compensation signal and a first voltage signal, and obtains a current reference signal by adding the integration signal and the first compensation signal. The control means provides control signals for respective ones of the N-phase power conversion circuits in accordance with the current reference signal. The first compensation signal represents a difference information between an output feedback signal of the switching power supply and a predetermined reference voltage.
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
An analog-to-digital converter includes a D/A conversion circuit, a comparator, and a logic control module. An input signal is sampled and held to obtain a sampling signal. The D/A conversion circuit receives the sampling signal and a reference voltage signal, and an output terminal of the D/A conversion circuit outputs a first voltage signal. The output terminal of the D/A conversion circuit is coupled to at least one input terminal of the comparator. An output terminal of the comparator is coupled to an input terminal of the logic control module, and the logic control module controls the D/A conversion circuit to adjust the first voltage signal according to a comparison result of the comparator. When the number of comparisons of the comparator reaches preset digits of the D/A conversion circuit, a data output terminal of the logic control module outputs a data signal corresponding to the input signal.
H03M 1/38 - Analogue value compared with reference values sequentially only, e.g. successive approximation type
H03M 1/46 - Analogue value compared with reference values sequentially only, e.g. successive approximation type with digital/analogue converter for supplying reference values to converter
52.
LED driver circuit, multi-wire communication device and method for LED display system
Disclosed is an LED driver circuit, a multi-wire communication device and a method for an LED display system. The device comprises a controller providing at least one of a configuration data packet, a brightness data packet, and a display data packet; the LED driver circuits, wherein the LED driver circuits are cascaded to provide a first data channel using first data ports and second data ports, the LED driver circuits are connected in parallel to provide a second data channel using third data ports. The device relays an enable signal or an address data packet stage by stage using the first data channel, transmit at least one of the configuration data packet, the brightness data packet and the display data packet in parallel using the second data channel. The number of the cascaded LED driver circuits can be infinite, the number of data wires is reduced, data rate is increased.
G09G 5/12 - Synchronisation between the display unit and other units, e.g. other display units, video-disc players
G09G 3/32 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
G09G 3/34 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix by control of light from an independent source
G09G 3/36 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix by control of light from an independent source using liquid crystals
The present disclosure relates to an electrostatic protection device including an SCR and a manufacturing method thereof. The electrostatic protection device includes a third N+ doped region across an N-type well region and a P-type well region, and a third P+ doped region adjacent to the third N+ doped region. Each of the third N+ doped region and the third P+ doped region has a high doping concentration. In a case that Zener breakdown occurs in a PN junction structure between the third N+ doped region and the third P+ doped region, the SCR is triggered to form a discharge current path. The present disclosure can reduce a trigger voltage of an electrostatic protection device including an SCR, and can provide electrostatic protection devices having different trigger voltages, with high stability and high robustness.
H10D 89/60 - Integrated devices comprising arrangements for electrical or thermal protection, e.g. protection circuits against electrostatic discharge [ESD]
Disclosed is a semiconductor device and a manufacturing method, comprising: forming a pad oxide layer and a silicon nitride layer on a substrate; etching the silicon nitride layer into a plurality of segments; forming an oxide layer, having an up-and-down wave shape, by performing a traditional thermal growth field oxygen method on the semiconductor device by use of the plurality of segments serving as forming-assisted structures; performing traditional processes on the semiconductor device having an up-and-down wavy semiconductor surface, to form a gate oxide layer, a polysilicon layer, and to form a source region and a drain region by implantation The semiconductor device having an up-and-down wavy channel region may be formed by a traditional thermal growth field oxygen method, thus the manufacturing processes are simple, the cost is low, and the completed device may have a larger effective channel width and a lower on-state resistance.
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 29/10 - Semiconductor bodies characterised by the shapes, relative sizes, or dispositions of the semiconductor regions with semiconductor regions connected to an electrode not carrying current to be rectified, amplified, or switched and such electrode being part of a semiconductor device which comprises three or more electrodes
The present disclosure relates to a flyback converter and a power supply system. The flyback converter comprises: a transformer; a first switching transistor and a second switching transistor; a first inductor and a first capacitor; and a control circuit. The control circuit includes an under voltage protection module configured to determine an under voltage protection threshold proportional to an output voltage of the flyback converter and to trigger an under voltage protection action of the flyback converter in a case that an input voltage of the flyback converter is less than the under voltage protection threshold. By setting an adaptive under voltage protection threshold, a system-restart phenomenon of the flyback converter after an input power failure or a shutdown may be avoided, and a PFC circuit may be turned off to optimize the standby power consumption and the low load efficiency in fast charging applications using an flyback topology.
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 1/32 - Means for protecting converters other than by automatic disconnection
H02M 1/36 - Means for starting or stopping converters
H02M 1/42 - Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
56.
Switched-mode power supply, power supply circuit thereof, and power supply method
A switched-mode power supply includes a first switch transistor. A drain of the first switch transistor receives an input voltage on a direct current input bus of the switched-mode power supply, and a source is connected to a reference ground. The power supply circuit includes a junction field-effect transistor (JFET), where a drain of the JFET receives the input voltage, a gate is connected to the reference ground, and a source outputs a supply voltage or a supply current. During each switch cycle, the first switch transistor is controlled to be turned off or a drain voltage is controlled to be greater than or equal to a first threshold voltage when the first switch transistor is turned on, such that the supply voltage or the supply current satisfies a drive voltage of the first switch transistor and an operating voltage of a to-be-powered circuit of the switched-mode power supply.
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
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
57.
Dynamic automotive turn signal circuit and dynamic automotive turn signal system
A dynamic automotive turn signal circuit includes at least one drive control module configured to receive a power supply signal from a body control module (BCM) to start operation, where the drive control module outputs first control signals at different delays through a delay unit; and a light emitting diode (LED) light set connected to the drive control module and lit based on the first control signals. A dynamic automotive turn signal system is further provided. The dynamic automotive turn signal circuit and the dynamic automotive turn signal system uses an external resistor to preset a high-precision delay circuit to realize the function of dynamic flowing turn signals. The external resistor can be used to configure a turn-on delay and a turn-off delay of the internal driver chip, such that the channel turn-on time and turn-off time can be flexibly adjusted.
B60Q 1/34 - Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating change of drive direction
An inductor includes an encapsulation shell with an inductive component encapsulated inside; an input electrode exposed on a surface of the encapsulation shell and configured to receive an alternating voltage; an output electrode exposed on the surface of the encapsulation shell and configured to output a direct current voltage, where the input electrode and the output electrode are electrically isolated by the encapsulation shell; and a metal shield layer asymmetrically covering the surface of the encapsulation shell and electrically connected to the output electrode, where the metal shield layer keeps the input electrode electrically isolated from the output electrode. An inductor fabrication method and a power supply circuit containing an inductor are further provided to resolve prior-art problems such as small range and poor effect of electromagnetic shielding and potential instability of the inductor, thereby achieving a better electromagnetic shielding effect and keeping the potential of the inductor stable.
H01F 41/00 - 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
59.
Illumination device, LED driver circuit, bleeder control circuit and control method
An illumination device, an LED driver circuit, a bleeder control circuit and a control method are provided. An AC input voltage is transmitted to a bus line after phase-cut processing. The bleeder control circuit includes a timing module configured to receive a bus voltage and at least one threshold voltage and generate a first time signal; a time processing module configured to receive the first time signal and generate a second time signal based on the first time signal in a previous power frequency half-wave cycle; and a control signal generation module configured to receive the second time signal and generate a first control signal for controlling a bleeder circuit. The beneficial effects of the present disclosure include the bleeder circuit being accurately controlled through the detection of the bus voltage and the implementation of the adaptive control method, thereby improving the operational efficiency and stability of the system.
A control method and control circuit of a switched-mode power supply, and the switched-mode power supply are provided. An operating mode of the switched-mode power supply is controlled in a first mode and a second mode according to an output feedback signal of the switched-mode power supply. One operating period of the first mode includes a switch period of a boundary conduction mode (BCM), and one operating period of the second mode includes N switch periods of BCMs and a switch period of a discontinuous conduction mode (DCM). The auxiliary switch transistor is turned on once to discharge a parasitic capacitor of the main switch transistor when the switched-mode power supply enters the next operating period from one operating period of the current second mode before the next operating period starts or the switched-mode power supply enters the first mode from the current second mode before the first mode starts.
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 1/08 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
61.
Flyback converter, constant-current control method, and lighting system
A flyback converter, a constant-current control method, and a lighting system are provided. The constant-current control method includes: sampling a loop current in a resonant loop to obtain a first sampling signal; obtaining zero crossing time of an excitation current in the resonant loop; and turning off a first switch tube when the first sampling signal reaches a reference value, and turning off a second switch tube after the zero crossing time of the excitation current in the resonant loop to control an average value of the excitation current to keep constant. The present disclosure can achieve a constant average value of an excitation current in each switching cycle based on a loop current in a resonant loop on the primary side of the converter, thereby realizing constant-current control of an output current of the converter.
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
62.
Buffer circuit for light emitting diode (LED) drive circuit, and LED drive circuit and control method thereof
A buffer circuit for an LED driver circuit, a LED driver circuit, and a control method, the buffer circuit includes a first control switch connected in series in a rectified input loop and a feedback control module connected to the rectified input loop to obtain a loop current in the rectified input loop for generating a first control signal to the first control switch according to the loop current and a reference signal. The first control switch switches between a fully conducting state and a non-fully-conducting state based on the first control signal and restrains the loop current when the first control switch is in the non-fully-conducting state. The buffer circuit enhances the effect of restraining the current change rate and can effectively restrain current spikes in a circuit, resulting in higher safety and reliability.
A light-emitting diode (LED) drive method, an LED drive circuit, and an LED lighting device are provided. The method includes: setting preset values of a maximum on-time parameter and a current limit parameter, where the preset values are in at least two sets; selecting a set of the preset values of the maximum on-time parameter and the current limit parameter after a value of a voltage signal on a direct current (DC) bus is detected; controlling a drive current flowing through an LED load based on a selected maximum on-time parameter and a selected current limit parameter. The maximum on-time parameter and the current limit parameter of the system can be adaptively adjusted according to an input voltage, so that the system can have a preferred dimming schedule and dimming depth while realizing a constant current in a wider input voltage range.
A frequency regulating circuit for a switching circuit, a frequency regulating method, and the switching circuit are provided. The frequency regulating circuit includes a charging current generating module configured to receive a first signal characterizing an output power and a second signal characterizing an input voltage to generate a charging current and a signal generating module configured to output a third signal according to the charging current. The third signal is used to adjust the maximum operating frequency of the switching circuit so that the maximum operating frequency decreases with the increase of the input voltage. Therefore, the frequency regulating circuit increases the maximum operating frequency of the switching circuit under the condition of low voltage input, which decreases the maximum operating frequency of the switching circuit under the condition of high voltage input to reduce the switching loss of the switching circuit with wide input voltage and improve efficiency.
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
A leakage protection circuit and a dimming drive circuit are provided. A leakage detection circuit is configured to detect whether leakage occurs between two input terminals that receive an external signal. When leakage occurs, leakage protection measures are taken. A pulse generation circuit receives the sampling signal characterizing the voltage between the two input terminals to compare the sampling signal with two thresholds to control a detection path of the leakage detection circuit to be turned on or off according to a comparison result. The leakage detection path is enabled to be turned on twice by setting two pulse signals in a power frequency period, which can consider the leakage detection of the front-edge phase-cutting dimming and rear-edge phase-cutting dimming of the dimming drive circuit and has a wide range of applications.
H05B 45/50 - Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDsCircuit arrangements for operating light-emitting diodes [LED] responsive to LED lifeProtective circuits
H05B 45/10 - Controlling the intensity of the light
Disclosed is an asymmetric half-bridge flyback converter and a control method, including: in an initial switching cycle of the asymmetric half-bridge flyback converter, obtaining a pre-turnoff time of the second switch transistor, and controlling the second switch transistor to be turned off after a delay which lasts for a first time and starts at the pre-turnoff time of the second switch transistor; in a non-initial switching cycle of the asymmetric half-bridge flyback converter, obtaining a judgment result by judging whether the first switch transistor is operated with zero-voltage switching in a current switching cycle, and adjusting a length of the first time based on the judgment result. The present disclosure can realize zero-voltage switching of the asymmetric half-bridge flyback converter, and at the same time, satisfy a requirement for achieving more ideal dead-time setting under a wider range of input voltage and a wider range of output voltage.
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
A current limiting circuit of a switching circuit, and a switching circuit are provided. The switching circuit uses a gallium nitride (GaN) power transistor as a main power transistor. The current limiting circuit includes a first terminal connected with a drain of the GaN power transistor, and a second terminal connected with a controller of the switching circuit. The current limiting circuit is configured to limit a current flowing out of a power supply terminal of the controller. The current limiting circuit suppresses a negative current flowing through the controller.
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
H02H 9/04 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
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
H03K 17/74 - 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 diodes
Disclosed is a flyback converter and a control method thereof. The flyback converter comprises: a transformer; a power switch; a driver; a synchronous rectifier; and a feedback control module, wherein the feedback control module is configured to output a primary-side turn-on signal when a new switching cycle is started; in each switching cycle, the feedback control module is configured to turn off a primary-side power switch according to a voltage across the synchronous rectifier and an output voltage of the flyback converter. The flyback converter only needs a single isolation device to achieve lossless equivalent peak current control and driving interlocking of primary side and the secondary side, and the synchronous rectifier can effectively prevent driving shoot-through of the primary side and the secondary side in terms of control without reducing a drive voltage, which further improves system efficiency and reliability.
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
A charging control method of power supply equipment and power supply equipment are provided. The power supply equipment includes a power stage circuit and a battery. An input power supply charges the battery through the power stage circuit. The power stage circuit includes a linear regulator and a switched capacitor converter. The linear regulator is connected with the switched capacitor converter. The linear regulator and/or the switched capacitor converter are/is selected for charging management according to charging power of the battery and/or a voltage of the battery. The charging control method can achieve relatively high charging efficiency when the battery is charged with a large current, and can achieve accurate control of the voltage of the battery when the battery is charged with a small current.
A single live line switch circuit includes a single live line connecting end, a switch unit, two wire channels, an on-state power obtaining circuit, an off-state power obtaining circuit, and an energy storage element. The single live line connecting end is connected to an external single live line. The on-state power obtaining circuit is connected to the single live line connecting end. The switch unit includes a fixed connecting end and a movable connecting end, and the fixed connecting end is connected to the on-state power obtaining circuit. The two wire channels are provided with a first connecting end and a second connecting end, respectively, and the movable connecting end of the switch unit is in contact with the first connecting end or the second connecting end. A control method of the single live line switch circuit is provided.
H03K 17/76 - Switching arrangements with several input- or output-terminals, e.g. multiplexers, distributors
H03K 17/567 - Circuits characterised by the use of more than one type of semiconductor device, e.g. BIMOS, composite devices such as IGBT
H03K 17/68 - 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 bipolar transistors specially adapted for switching AC currents or voltages
71.
Switch protection circuit and power converter suited for different input voltage ranges
Disclosed is a switch protection circuit and a power converter, configured to set upper and lower limit-value current signals which can be adjusted along with an input voltage, so that instantaneous power of a main power switch can be prevented from being too high, and the main power switch can always be operated within a safe operating range, thereby solving the problem that the power converter is easy to be damaged in applications under a high-current circumstance.
H02H 7/12 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for convertersEmergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for rectifiers for static converters or rectifiers
H02H 1/00 - Details of emergency protective circuit arrangements
72.
Control method of switching circuit, control circuit of switching circuit, and switching circuit
A control method of a switching circuit, a control circuit of the switching circuit and the switching circuit are provided. The control circuit includes a slope buffer and a first operational amplifier. The slope buffer receives a first voltage reference, and controls slopes of a rising edge and a falling edge to generate a second voltage reference. The first operational amplifier receives an output feedback voltage and a reference voltage, and performs an operational amplification to obtain a compensation voltage. When the first voltage reference has the falling edge, the reference voltage is coupled to the first voltage reference through a first switch, and the second voltage reference is coupled to an output voltage through a second switch. When the first voltage reference has the rising edge, the reference voltage is coupled to the second voltage reference through a third switch.
An X-capacitor discharge method applied to a switched-mode power supply, wherein the switched-mode power supply comprises an X-capacitor, a rectifier circuit and a switching circuit; the X-capacitor discharge method comprises: arranging a first diode, wherein an anode of the first diode is connected to a first end of the X-capacitor, and a cathode of the first diode is configured as a first node; when it is detected that a voltage of the first node is higher than a first voltage threshold, pulling down the first node through a first sampling current, and performing a timing; and if a time for which the voltage of the first node continues to be higher than the first voltage threshold reaches a first threshold time, pulling down the first node through a first pull-down current. An X-capacitor discharge circuit applied to the switched-mode power supply is provided.
H02M 1/44 - Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
H02M 1/32 - Means for protecting converters other than by automatic disconnection
H02M 7/06 - Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
74.
Inductive current simulation circuit of switching circuit, inductive current simulation method of switching circuit, and switched-mode power supply
An inductive current simulation circuit of a switching circuit, an inductive current simulation method of the switching circuit, and a switched-mode power supply are provided. The inductive current simulation method includes the following steps: based on an error amplification circuit, performing, by the error amplification circuit, an error amplification on a first sampling signal representing a current of a synchronous rectifier and a second sampling signal representing an inductive current simulation signal when the synchronous rectifier is turned on to obtain an error amplification signal; and reconstructing an inductive current according to the error amplification signal when the synchronous rectifier is turned on and a first current when a main power transistor is turned on to obtain the inductive current simulation signal.
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
A synchronous rectification control circuit and method, and a flyback switched-mode power supply (SMPS) are provided. A voltage adjustment circuit is used to adjust a value of a first voltage signal that represents an output voltage, such that a voltage-second product of a difference between the output voltage and a drain-source voltage of a secondary-side synchronous rectifier can be zeroed in time in a transient process, and no false accumulation occurs. In this way, when a primary-side transistor switch is turned on, the secondary-side synchronous rectifier is turned off, to avoid a case in which the primary-side transistor switch and the secondary-side synchronous rectifier are simultaneously turned on.
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
76.
Switching-type regulation driver and regulation driving method thereof
A switching-type regulation driver includes a transformer, a controller, a synchronous rectifier and a drive control module. The drive control module is connected to the synchronous rectifier and the non-dotted terminal of the secondary winding respectively, and is used to detect a target parameter of a voltage across both power ends of the synchronous rectifier when the synchronous rectifier disconnects the conductive path between the non-dotted terminal of the secondary winding and the reference ground. When it is detected that the target parameter of the voltage across both power ends of the synchronous rectifier meets a preset condition, the controller controls a switching action of the first transistor so that the primary winding transmits power to the secondary winding. According to the present disclosure, the pre-stage chip may be matched with to realize a function of dynamic acceleration, and the dependence on the output pin may be reduced.
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
77.
Manufacture method of lateral double-diffused transistor
The present disclosure provides a manufacture method of an LDMOS. The manufacture method includes: forming a drift region in a substrate; forming a gate structure on the substrate, the gate structure defining a source region and a drain region which are separated from each other, and the gate structure including a gate oxide layer and a gate conductor layer which are successively stacked on the substrate; forming a first doped region in the source region, wherein the first doped region is surrounded by the drift region; forming a first barrier layer with a first opening on the source region and in connect with sidewall of the gate structure; forming a first implantation region in the source region through self-aligned implantation on the basis of the first opening of the first barrier layer; and forming a second implantation region and a third implantation region respectively.
H01L 29/78 - Field-effect transistors with field effect produced by an insulated gate
H01L 21/04 - Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
A flyback switching circuit and control method thereof is disclosed, by setting a reference value greater than zero configured for controlling a turn-off time of a first transistor of the flyback switching circuit, a drain-source voltage of a main power transistor of the flyback switching circuit is consistent with the reference value greater than zero before the main power transistor is turned on, so that a turn-on power consumption of the main power transistor is reduced and a system efficiency is improved.
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
Disclosed is a semiconductor structure and a manufacturing method. The semiconductor structure includes an N-type doped region in a substrate; a metal structure on a surface of the substrate and including a middle portion and an edge portion, wherein the middle portion is in contact with the N-type doped region so as to form an SBD; a first P-type well region which is located in the N-type doped region, in contact with the edge portion and separates the edge portion from the N-type doped region; a first P-type contact region located in the first P-type well region and separated from the edge portion. When the first P-type contact region is grounded, the first P-type well region receives an anode voltage of the SBD. Low voltage drop and high frequency characteristics of the SBD are maintained on a premise of improving the breakdown voltage reducing the leak current.
Disclosed is a semiconductor device and a method for manufacturing the same. The semiconductor device comprises a drift region on a substrate, a well region on the drift region, a source-end doped region in the well region, a drain-end doped region on the drift region, and a gate structure which is located between a source end and a drain end, located at a position of the well region, and forms a channel region in the well region. The source-end doped region comprises a first doped region and a second doped region with opposite doping types, the channel region connects the first doped region and the drift region. The first doped region and the second doped region of the source end are equivalently close to the gate structure, a distance between the second doped region and a PN junction surface formed by the drift region and the well region is reduced.
H01L 29/78 - Field-effect transistors with field effect produced by an 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 29/10 - Semiconductor bodies characterised by the shapes, relative sizes, or dispositions of the semiconductor regions with semiconductor regions connected to an electrode not carrying current to be rectified, amplified, or switched and such electrode being part of a semiconductor device which comprises three or more electrodes
81.
Semiconductor device and manufacturing method thereof
Disclosed is a semiconductor device and a manufacturing method, comprising: forming a pad oxide layer and a silicon nitride layer on a substrate; etching the silicon nitride layer into a plurality of segments; forming an oxide layer, having an up-and-down wave shape, by performing a traditional thermal growth field oxygen method on the semiconductor device by use of the plurality of segments serving as forming-assisted structures; performing traditional processes on the semiconductor device having an up-and-down wavy semiconductor surface, to form a gate oxide layer, a polysilicon layer, and to form a source region and a drain region by implantation The semiconductor device having an up-and-down wavy channel region may be formed by a traditional thermal growth field oxygen method, thus the manufacturing processes are simple, the cost is low, and the completed device may have a larger effective channel width and a lower on-state resistance.
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 29/10 - Semiconductor bodies characterised by the shapes, relative sizes, or dispositions of the semiconductor regions with semiconductor regions connected to an electrode not carrying current to be rectified, amplified, or switched and such electrode being part of a semiconductor device which comprises three or more electrodes
09 - Scientific and electric apparatus and instruments
Goods & Services
Computers; optical communication equipment; equipment for
communication networks; chips [integrated circuits];
amplifiers; semi-conductor devices; current rectifiers;
stabilized voltage power supply; battery chargers; solar
batteries.
