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公开(公告)号：US20210144832A1
公开(公告)日：2021-05-13
申请号：US17152373
申请日：2021-01-19
发明人： Wei-Jia YU , Min-Min FAN , Feng QI , Shun-Gen SUN , Fu-Qiang ZHANG
摘要： A linear driving system for LED with high power factor including a rectifying circuit receiving an AC voltage and generating a DC voltage to a power supply bus having a protection circuit coupled thereto. The protection circuit includes a detection unit for acquiring a voltage signal based on a power supply bus voltage, and to generate a detection result which indicates undesirable oscillation on the power supply bus voltage. A control unit includes a delay control module connected with the detection unit, and is coupled to the detection unit and for generating a control signal based on the detection result. The delay control module is for outputting a first control signal when undesirable oscillation happens, and outputting a second control signal after a protection period when undesirable oscillation disappears. A switch circuit controlled by the first control signal and the second control signal turns off for the protection period.
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2.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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公开(公告)号：US20210068228A1
公开(公告)日：2021-03-04
申请号：US17085863
申请日：2020-10-30
发明人： Wei-Jia YU , Min-Min FAN , Feng QI
IPC分类号： H05B45/3575 , H05B45/10 , H05B41/38
摘要： A control circuit and method for a bleeder, a chip, and a driver system. The bleeder control circuit is connected to a dimmer detector used for detecting the presence or absence of a dimmer and a type of the dimmer. The control circuit of the bleeder is used to receive a detection signal outputted by the dimmer detector, and generate a control signal for the bleeder according to the detection signal, the control signal is used to control an operating state of the bleeder. The application correspondingly generates a control signal for a bleeder according to a detection signal indicating the presence or absence of a dimmer and the type of the dimmer so as to control the bleeder to operate only at a given phase interval, and may thereby reduce the power consumption of the bleeder when ensuring the stable operation of a dimmer.
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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：US20210068229A1
公开(公告)日：2021-03-04
申请号：US17086889
申请日：2020-11-02
发明人： Wei-Jia YU , Min-Min FAN , Feng QI
IPC分类号： H05B45/36 , H05B45/345 , H05B47/16
摘要： The present invention provides a power control circuit which has a timing unit used for timing an elapsed time of current half cycle of the phase-cut AC power supply signal, outputting a current accumulated timing duration, and outputting a first control signal at a starting moment when a starting point of a half cycle of the AC power supply signal is detected; a regulating unit connected to the timing unit and comprising a temporary storage module, wherein a final reference time interval is stored in the temporary storage module, and when the current accumulated timing duration reaches the final reference time interval, the regulating unit outputs a second control signal; and a control unit connected to the detection unit and the regulating unit and used for controlling current in a load based on the first control signal and the second control signal.
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