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1.发明申请公开(公告)号：US20210384832A1
公开(公告)日：2021-12-09
申请号：US17339748
申请日：2021-06-04
发明人： Rulong JIANG , Liqiang HU , Shungen SUN , Zhen ZHU , Xiaoru GAO , Yihui CHEN , Hong ZHANG , Pengfei LU
摘要： A switch-mode power supply (SMPS), an SMPS system and a power supply method for an SMPS system are disclosed. The SMPS controller includes an output-voltage power supply unit, a built-in energy storage unit and a logic control unit. The output-voltage power supply unit is configured to charge the built-in energy storage unit using an output voltage from the SMPS system so that the built-in energy storage unit can provide an operating voltage for the logic control unit. The use of a stand-off energy storage capacitor can be dispensed with, and the use of the output voltage as a power supply is enabled. As a result, significant reductions in overall and standby power dissipation are achieved. In addition, the SMPS controller may further include a high-voltage power supply unit, which provides a hybrid power supply solution, together with the output-voltage power supply unit.
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公开(公告)号：US20230034590A1
公开(公告)日：2023-02-02
申请号：US17875140
申请日：2022-07-27
发明人： Xiaohui CAI , Shungen SUN
IPC分类号： H05B45/345 , H05B45/375
摘要： A control circuit for a constant-current drive circuit, as well as a constant-current drive circuit are disclosed. The control circuit can obtain output information of the constant-current drive circuit and use it in combination with reference information to determine, according to an output condition corresponding to the current load of the constant-current drive circuit, a time point for the system to enter or exit a rapid drive mode. Therefore, it can be suitably used in various application scenarios to determine a time point for the system to entry into or exit from the rapid start mode. Compared with fast charging for a fixed period of time as used in the prior art, embodiments of the present invention can effectively overcome the problem of easy overshooting or inadequate acceleration during start as found in various applications.
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公开(公告)号：US20220209662A1
公开(公告)日：2022-06-30
申请号：US17553968
申请日：2021-12-17
发明人： Shungen SUN
IPC分类号： H02M3/155
摘要： A control circuit for a power converter is disclosed. The power converter includes a switching circuit including a first switching transistor and a second switching transistor. The control circuit includes: a comparator having a first input configured to receive at least a reference signal, a second input configured to receive at least a feedback signal and an output configured to output a comparison signal; a minimum off-time generation circuit; an on-time generation circuit for producing an on-time signal for controlling both the first switching transistor and the second switching transistor; and a ramp compensation circuit configured to generate a ramp compensation signal.
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4.发明申请公开(公告)号：US20190335563A1
公开(公告)日：2019-10-31
申请号：US16459321
申请日：2019-07-01
发明人： Weijia YU , Minmin FAN , Feng QI , Shungen SUN , Fuqiang ZHANG
IPC分类号： H05B33/08
摘要： The present disclosure provides a protection circuit, a drive system, a chip and a circuit protection method, and a drive method. The protection circuit can be used in a circuit system in which a load is driven by a switch circuit, and acquire a voltage signal reflecting the voltage of a power supply bus on which the load located and generate a detection signal, and control the switch circuit to maintain a forcible non-conductive state within a protection period when detecting that the voltage of the detection signal satisfies a preset voltage warning condition. The present application solves the problem of circuit protection of DC-powered electronics in the prior art.
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公开(公告)号：US20220216783A1
公开(公告)日：2022-07-07
申请号：US17702353
申请日：2022-03-23
发明人： Xiaoru GAO , Shungen SUN
IPC分类号： H02M1/42 , H02M1/15 , H02M7/06 , H05B45/355 , H05B45/3725 , H05B45/20 , H05B45/36 , H05B45/59
摘要： A high power factor control circuit is disclosed, which is used in an AC/DC converter. The converter includes a rectification module, a conversion module and a load. The rectification module receives AC power and rectifies it into a DC current, and the conversion module converts the DC current to drive power as desired by the load and provides it to the load. The conversion module includes a conversion element including an inductive element and a switching element. The control circuit includes a peak limiting signal generator and a switching element control module. The peak limiting signal generator receives a reference signal and produces at least one peak limiting signal from a sample signal. The switching element control module is configured to control switching of the switching element so that, within at least half a line-frequency period, a value of the ripple in the output current flowing through the load is not greater than a limit value.
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公开(公告)号：US20220209646A1
公开(公告)日：2022-06-30
申请号：US17566307
申请日：2021-12-30
发明人： Shungen SUN , Hanfei YANG
摘要： A control circuit for a power converter comprising switching transistors and an output inductor is disclosed. One terminal of the output inductor serves as an output node, and another terminal of the output inductor serves as a switching node. The control circuit is configured to generate a control signal for controlling switching transistors in the power converter. The control circuit includes: a RC oscillator network connected to two terminals of the output inductor, the RC oscillator network configured to generate an oscillation signal containing a feedback ramp slope compensation component in response to a change in a voltage across the terminals of the output inductor; a comparator; an on-time generation circuit; and a control signal generation circuit to generate the control signal for controlling the switching transistors in the power converter.
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公开(公告)号：US20210212180A1
公开(公告)日：2021-07-08
申请号：US17207150
申请日：2021-03-19
发明人： Shungen SUN , Weijia YU
摘要： The present disclosure provides a leakage protection circuit, a method and a drive device. The leakage protection circuit is used for being electrically connected with the power supply line of a load, and may be configured to sample the power supply line at intervals, detect the voltage of the sampled electrical signals to determine whether the voltage of the AC input power is divided, and provide leakage protection based on the determined result. The present disclosure can prevent human from electric shock through sampling the electric signals from the power supply line at intervals and performing voltage detection and comparasion to determine whether the voltage of the accessed AC input power is divided, when the voltage of the accessed AC input power is determined to be divided, the power supply line will be controlled in non-conductive state.
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公开(公告)号：US20230387798A9
公开(公告)日：2023-11-30
申请号：US17556666
申请日：2021-12-20
发明人： Shungen SUN , Hanfei YANG
CPC分类号： H02M3/158 , H02M1/083 , H02M1/0009
摘要： A control circuit for a switched-mode power converter to generate a control signal for controlling switching transistors in the power converter is disclosed. The control circuit includes: a comparator; a ramp compensation circuit for producing and applying a ramp compensation signal to a first or second input of the comparator; an on-time generation circuit to generate an on-time timer signal; and a control signal generation circuit to generate, based on the comparison signal and the on-time timer signal, the control signal for controlling the switching transistors in the power converter. The ramp compensation signal output from the ramp compensation circuit is configured with: a first slope during an inductor demagnetization interval in operation of the power converter in CCM and a second slope during an inductor demagnetization interval and a zero-current interval in operation of the power converter in DCM, the first slope is greater than the second slope.
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公开(公告)号：US20190338936A1
公开(公告)日：2019-11-07
申请号：US16515939
申请日：2019-07-18
发明人： Shungen SUN , Weijia YU
摘要： The present disclosure provides a leakage protection circuit, a method and a drive device. The leakage protection circuit is used for being electrically connected with the power supply line of a load, and may be configured to sample the power supply line at intervals, detect the voltage of the sampled electrical signals to determine whether the voltage of the AC input power is divided, and provide leakage protection based on the determined result. The present disclosure can prevent human from electric shock through sampling the electric signals from the power supply line at intervals and performing voltage detection and comparison to determine whether the voltage of the accessed AC input power is divided, when the voltage of the accessed AC input power is determined to be divided, the power supply line will be controlled in non-conductive state.
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10.发明申请公开(公告)号：US20190335562A1
公开(公告)日：2019-10-31
申请号：US16230882
申请日：2018-12-21
发明人： Weijia YU , Minmin FAN , Feng QI , Shungen SUN , Fuqiang ZHANG
IPC分类号： H05B33/08
摘要： The present disclosure provides a protection circuit, a drive system, a chip and a circuit protection method, and a drive method. The protection circuit can be used in a circuit system in which a load is driven by a switch circuit, and acquire a voltage signal reflecting the voltage of a power supply bus on which the load located and generate a detection signal, and control the switch circuit to maintain a forcible non-conductive state within a protection period when detecting that the voltage of the detection signal satisfies a preset voltage warning condition. The present application solves the problem of circuit protection of DC-powered electronics in the prior art.
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