公开(公告)号：US11088627B2

公开(公告)日：2021-08-10

申请号：US16742896

申请日：2020-01-14

Applicant: Chengdu Monolithic Power Systems Co. Ltd.

Inventor： Siran Wang

IPC: H02M3/335 ,  H02M1/08 ,  H02M1/00

Abstract: A switching power supply circuit with synchronous rectifier has an energy storage component, a rectifier switch coupled to a secondary side of the energy storage component, and a secondary side control circuit. The secondary side control circuit provides a driving signal to control the rectifier switch. When the drain-source voltage across the rectifier switch is less than a first threshold value, the secondary side control circuit controls the driving signal to be a maximum voltage to control the rectifier switch being fully on for a predetermined duration. After a predetermined duration, the secondary side control circuit adjusts the voltage of the driving signal based on the drain-source voltage across the rectifier switch and a second threshold value.

公开(公告)号：US20210184584A1

公开(公告)日：2021-06-17

申请号：US16953729

申请日：2020-11-20

Applicant: Chengdu Monolithic Power Systems Co., Ltd.

Inventor： Siran Wang

IPC: H02M3/335 ,  H02M1/08

Abstract: A power converter includes a first and a second transformers having different auxiliary winding voltage levels. A bias voltage supply circuit generates a bias supply voltage of an integrated circuit used to control the power converter, and includes a first and a second bias supply branches jointly coupled to a supply capacitor to provide the bias supply voltage. When the bias supply voltage is higher than a threshold voltage, the first bias supply branch to receive the one with lower level of the two auxiliary winding voltages is switched from a deactivation state to an activation state to provide the bias supply voltage, when the bias supply voltage is less than the threshold voltage, the second bias supply branch to receive the one with larger level of the two auxiliary winding voltages is switched from the deactivation state to the activation state to provide the bias supply voltage.

公开(公告)号：US20190006935A1

公开(公告)日：2019-01-03

申请号：US16007978

申请日：2018-06-13

Applicant: Chengdu Monolithic Power Systems Co., Ltd.

Inventor： Siran Wang

IPC: H02M1/08 ,  H02M3/335

CPC classification number: H02M1/08 ,  H02M3/33507 ,  H02M3/33523 ,  H02M2001/0009 ,  H02M2001/0025 ,  H02M2001/0054 ,  H02M2001/0058 ,  Y02B70/1433

Abstract: A switching converter with quasi-resonant control having a switch and an energy storage component, comprising a peak current regulating circuit configured to provide a peak current regulating signal to regulate a peak current signal or a current sense signal, wherein the peak current regulating signal is adjusted when non-CCM (Current Continuous Mode) and non-valley-switching are detected.

公开(公告)号：US09407155B2

公开(公告)日：2016-08-02

申请号：US14512251

申请日：2014-10-10

Applicant: Chengdu Monolithic Power Systems Co., Ltd.

Inventor： Siran Wang ,  Eric Yang ,  John Wiggenhorn ,  Qiming Zhao

IPC: H02M3/335

CPC classification number: H02M3/33592 ,  Y02B70/1475

Abstract: A controller of an isolated switching converter includes an error amplifying circuit, a modulation signal generator, a first comparison circuit, a primary off detection circuit, a secondary logic circuit, an isolation circuit and a primary logic circuit. The error amplifying circuit generates a compensation signal based on the difference between a reference signal and a feedback signal. The first comparison circuit compares the compensation signal with a modulation signal generated by the modulation signal generator and generates a first comparison signal. The primary off detection circuit detects whether the primary switch is off and generates a primary off detection signal. The secondary logic circuit generates a secondary control signal to control the secondary switch based on the first comparison signal and the primary off detection signal. The isolation circuit receives the first comparison signal and generates a synchronous signal electrically isolated from the first comparison signal. The primary logic circuit generates a primary control signal to control the primary switch based on the synchronous signal.

Abstract translation: 隔离开关转换器的控制器包括误差放大电路，调制信号发生器，第一比较电路，初级截止检测电路，次级逻辑电路，隔离电路和主逻辑电路。 误差放大电路基于参考信号和反馈信号之间的差产生补偿信号。 第一比较电路将补偿信号与由调制信号发生器产生的调制信号进行比较，并产生第一比较信号。 主断路检测电路检测主开关是否断开并产生初次断开检测信号。 次级逻辑电路基于第一比较信号和初级截止检测信号产生辅助控制信号以控制次级开关。 隔离电路接收第一比较信号并产生与第一比较信号电隔离的同步信号。 主逻辑电路基于同步信号产生主控制信号以控制主开关。

公开(公告)号：US20140153301A1

公开(公告)日：2014-06-05

申请号：US13931749

申请日：2013-06-28

Applicant: Chengdu Monolithic Power Systems Co., Ltd.

Inventor： Siran Wang ,  Yike Li ,  Kun Yi ,  Yuancheng Ren ,  Junming Zhang ,  En Li

IPC: G01R19/15 ,  H02H7/125

CPC classification number: G01R19/175 ,  G01R31/42

Abstract: An AC signal detector having: a rectify circuit having a first input terminal and a second input terminal configured to receive an AC signal, and an output terminal configured to provide a rectified signal based on the AC signal; a detecting circuit having an input terminal coupled to the output terminal of the rectify circuit to receive the rectified signal, and an output terminal configured to provide a square signal based on the rectified signal; and an unplug indicate circuit having an input terminal coupled to the detecting circuit to receive the square signal, and an output terminal configured to provide an unplug indicate signal based on the square signal.

Abstract translation: 一种AC信号检测器，具有：具有第一输入端和被配置为接收AC信号的第二输入端的整流电路，以及输出端，被配置为基于所述AC信号提供整流信号; 检测电路，其具有耦合到整流电路的输出端以接收整流信号的输入端子，以及输出端子，被配置为基于整流信号提供平方信号; 以及拔出指示电路，其具有耦合到所述检测电路的输入端子以接收所述平方信号，以及输出端子，被配置为基于所述平方信号提供拔出指示信号。

公开(公告)号：US20130301311A1

公开(公告)日：2013-11-14

申请号：US13889286

申请日：2013-05-07

Applicant: CHENGDU MONOLITHIC POWER SYSTEMS CO., LTD.

Inventor： Siran Wang ,  Junming Zhang ,  Yuancheng Ren

IPC: H02M3/335

CPC classification number: H02M3/33515 ,  H02M3/33507 ,  H02M3/33523

Abstract: A switching mode power supply, having: an input port; an output port; an energy storage component and a pair of power switches coupled between input port and the output port; an error amplifier configured to generate an amplified error signal based on the feedback signal and the reference signal; an error comparator configured to generate a frequency control signal based on the amplified error signal and the first sawtooth signal; a peak current generator configured to generate a peak current signal based on the frequency control signal; a peak current comparator configured to generate a current limit signal based on the peak current signal and the current sense signal; and a logic circuit configured to generate a switching signal to control the power switches based on the frequency control signal and the current limit signal.

Abstract translation: 一种开关模式电源，具有：输入端口; 输出端口 耦合在输入端口和输出端口之间的能量存储部件和一对电源开关; 误差放大器，被配置为基于所述反馈信号和所述参考信号产生放大的误差信号; 误差比较器，被配置为基于放大的误差信号和第一锯齿波信号产生频率控制信号; 峰值电流发生器，被配置为基于所述频率控制信号产生峰值电流信号; 峰值电流比较器，被配置为基于峰值电流信号和电流检测信号产生限流信号; 以及逻辑电路，被配置为基于所述频率控制信号和所述电流限制信号产生开关信号以控制所述功率开关。