公开(公告)号：US09595885B2

公开(公告)日：2017-03-14

申请号：US13889255

申请日：2013-05-07

Applicant: Chengdu Monolithic Power Systems Co., Ltd.

Inventor： Siran Wang ,  Junming Zhang ,  Yuancheng Ren

IPC: H02M3/335 ,  H02M7/217

CPC classification number: H02M7/217 ,  H02M3/33523

Abstract: An isolated switching mode power supply, having: an input terminal; an output terminal; a transformer having a primary winding and a secondary winding; a primary power switch coupled to the primary winding; a secondary power switch coupled between the secondary winding and the output terminal of the power supply; a secondary controller configured to generate a frequency modulation signal based on the output voltage and the first feedback signal; a coupled device configured to provide a frequency control signal based on the output voltage and the frequency modulation signal; and a primary controller configured to provide a switching signal to control the primary power switch based on the current sense signal and the frequency control signal.

Abstract translation: 一种隔离开关电源，具有：输入端子; 输出端子; 具有初级绕组和次级绕组的变压器; 耦合到初级绕组的主电源开关; 二次电源开关，其耦合在所述次级绕组和所述电源的输出端子之间; 二次控制器，被配置为基于所述输出电压和所述第一反馈信号生成频率调制信号; 耦合器件，被配置为基于所述输出电压和所述频率调制信号来提供频率控制信号; 以及主控制器，被配置为基于所述电流检测信号和所述频率控制信号来提供开关信号以控制所述主电源开关。

公开(公告)号：US09467039B2

公开(公告)日：2016-10-11

申请号：US14842724

申请日：2015-09-01

Applicant: Chengdu Monolithic Power Systems Co., Ltd.

Inventor： Naixing Kuang ,  Zilin Fan ,  Yuancheng Ren

IPC: H05B37/02 ,  H02M1/14 ,  H05B33/08

CPC classification number: H02M1/14 ,  H02M1/15 ,  H02M1/4258 ,  H05B33/0809 ,  H05B33/0818 ,  H05B33/0845 ,  Y02B70/126

Abstract: A ripple suppression circuit has a filter circuit and a follower circuit. The filter circuit has a first input terminal coupled to a signal source to receive a ripple signal and an output terminal to output a filter signal which is the sum of the average value of the ripple signal and a positive bias signal. The follower circuit has a first input terminal, a second input terminal and an output terminal, wherein the first input terminal is coupled to the signal source to receive the ripple signal, the second input terminal is coupled to the output terminal of the filter circuit to receive the filter signal, the follower circuit provides an output signal at the output terminal, the output signal at least partially follows the filter signal.

Abstract translation: 纹波抑制电路具有滤波电路和跟随电路。 滤波器电路具有耦合到信号源以接收纹波信号的第一输入端和输出端，以输出作为纹波信号的平均值和正偏置信号之和的滤波器信号。 跟随器电路具有第一输入端子，第二输入端子和输出端子，其中第一输入端子耦合到信号源以接收纹波信号，第二输入端子耦合到滤波器电路的输出端子 接收滤波器信号，跟随器电路在输出端提供输出信号，输出信号至少部分跟随滤波器信号。

公开(公告)号：US09407151B2

公开(公告)日：2016-08-02

申请号：US14508929

申请日：2014-10-07

Applicant: Chengdu Monolithic Power Systems Co., Ltd.

Inventor： Junming Zhang ,  Yuancheng Ren

IPC: H02M3/335 ,  H02M1/00

CPC classification number: H02M3/33507 ,  H02M2001/0032 ,  Y02B70/16

Abstract: An isolated switching converter includes a transformer having a primary winding, a secondary winding and an auxiliary winding, a primary switch coupled to the primary winding, a secondary switch coupled to the secondary winding, and a feedback circuit coupled to the auxiliary winding to generate a feedback signal indicative of the output voltage. Under normal operation, the primary switch is controlled based on the feedback signal and the secondary switch is controlled based on the status of the primary switch. Under light load condition, the secondary switch is controlled based on the output voltage. The secondary switch is turned on to generate a negative secondary current flowing through the secondary winding and turned off when the negative secondary current reaches a secondary current threshold. The primary switch is turned on based on a negative primary current and turned off when the primary current reaches a primary current threshold.

Abstract translation: 隔离开关转换器包括具有初级绕组，次级绕组和辅助绕组的变压器，耦合到初级绕组的初级开关，耦合到次级绕组的次级开关，以及耦合到辅助绕组的反馈电路，以产生 反馈信号表示输出电压。 在正常工作状态下，主开关根据反馈信号进行控制，二次开关根据主开关的状态进行控制。 在轻负载条件下，二次开关基于输出电压进行控制。 二次开关导通以产生流过次级绕组的负二次电流，当负二次电流达到次级电流阈值时，二次开关截止。 初级开关基于负初级电流导通，并在初级电流达到初级电流阈值时关闭。

公开(公告)号：US20160065051A1

公开(公告)日：2016-03-03

申请号：US14842724

申请日：2015-09-01

Applicant: Chengdu Monolithic Power Systems Co., Ltd.

Inventor： Naixing Kuang ,  Zilin Fan ,  Yuancheng Ren

IPC: H02M1/14 ,  H05B33/08

CPC classification number: H02M1/14 ,  H02M1/15 ,  H02M1/4258 ,  H05B33/0809 ,  H05B33/0818 ,  H05B33/0845 ,  Y02B70/126

Abstract: A ripple suppression circuit has a filter circuit and a follower circuit. The filter circuit has a first input terminal coupled to a signal source to receive a ripple signal and an output terminal to output a filter signal which is the sum of the average value of the ripple signal and a positive bias signal. The follower circuit has a first input terminal, a second input terminal and an output terminal, wherein the first input terminal is coupled to the signal source to receive the ripple signal, the second input terminal is coupled to the output terminal of the filter circuit to receive the filter signal, the follower circuit provides an output signal at the output terminal, the output signal at least partially follows the filter signal.

Abstract translation: 纹波抑制电路具有滤波电路和跟随电路。 滤波器电路具有耦合到信号源以接收纹波信号的第一输入端和输出端，以输出作为纹波信号的平均值和正偏置信号之和的滤波器信号。 跟随器电路具有第一输入端子，第二输入端子和输出端子，其中第一输入端子耦合到信号源以接收纹波信号，第二输入端子耦合到滤波器电路的输出端子 接收滤波器信号，跟随器电路在输出端提供输出信号，输出信号至少部分跟随滤波器信号。

公开(公告)号：US09065348B2

公开(公告)日：2015-06-23

申请号：US13889223

申请日：2013-05-07

Applicant: Chengdu Monolithic Power Systems Co., Ltd.

Inventor： Siran Wang ,  Junming Zhang ,  Yuancheng Ren

IPC: H02M3/335 ,  H02M1/36

CPC classification number: H02M3/33523 ,  H02M1/36

Abstract: An isolated switching mode power supply, having: a transformer having a primary winding, a secondary winding and a third winding; a current limit comparator configured to provide a current limit signal based on the current sense signal and the peak current signal; a logic circuit configured to provide a logic control signal based on the frequency control signal and the current limit signal; a startup control circuit configured to generate a startup control signal based on the current sense signal; a load detecting circuit configured to provide a load detecting signal based on the second feedback signal and the switching signal; and a selector configured to provide the logic control signal or the startup control signal based on the load detecting signal.

Abstract translation: 一种隔离开关电源，具有：具有初级绕组，次级绕组和第三绕组的变压器; 电流限制比较器，被配置为基于电流检测信号和峰值电流信号提供限流信号; 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来提供逻辑控制信号; 启动控制电路，被配置为基于所述电流检测信号产生启动控制信号; 负载检测电路，被配置为基于所述第二反馈信号和所述开关信号提供负载检测信号; 以及选择器，其被配置为基于所述负载检测信号来提供所述逻辑控制信号或所述启动控制信号。

公开(公告)号：US20150016154A1

公开(公告)日：2015-01-15

申请号：US14327219

申请日：2014-07-09

Applicant: Chengdu Monolithic Power Systems Co., Ltd.

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

IPC: H03K5/1532 ,  H02M3/335

CPC classification number: H02M1/4258 ,  Y02B70/126

Abstract: A peak sample circuit for AC voltage, including: a rectifier coupled to receive an AC voltage and to rectify the AC voltage to generate a rectified signal; a delay circuit coupled to receive the rectified signal and to delay the rectified signal to generate a delayed rectified signal; a comparison circuit coupled to receive the delayed rectified signal and to generate a square signal based on the comparison of the rectified signal and the delayed rectified signal; and a sample output circuit coupled to receive the rectified signal, wherein the sample output circuit samples the rectified signal under the control of the square signal and provides a peak sample signal representative of the peak value of the AC voltage.

Abstract translation: 一种用于AC电压的峰值采样电路，包括：整流器，被耦合以接收AC电压并且对AC电压进行整流以产生整流信号; 延迟电路，被耦合以接收整流信号并延迟整流信号以产生延迟整流信号; 比较电路，其耦合以接收延迟整流信号，并且基于整流信号与延迟整流信号的比较产生平方信号; 以及耦合以接收整流信号的采样输出电路，其中所述采样输出电路在所述平方信号的控制下对所述整流信号进行采样，并提供表示所述AC电压的峰值的峰值采样信号。

公开(公告)号：US20130307498A1

公开(公告)日：2013-11-21

申请号：US13711570

申请日：2012-12-11

Applicant: CHENGDU MONOLITHIC POWER SYSTEMS CO., LTD.

Inventor： Lijie Jiang ,  Qian Ouyang ,  Xiaokang Wu ,  Bo Zhang ,  Suhua Luo ,  Yuancheng Ren ,  Eric Yang

IPC: G05F1/10

CPC classification number: G05F1/10 ,  H02M3/1584 ,  H02M2001/0003 ,  H02M2001/0025 ,  H02M2003/1586

Abstract: A multi-phase switching converter comprising a plurality of switching circuits, a comparing circuit and a control circuit. The comparing circuit generates a comparison signal based on a reference signal and the output voltage of the multi-phase switching converter. The control circuit can turn on the following switching circuit based on the comparison signal only after the time from the current switching circuit being turned on reaches a first time threshold or the off-time of the current switching circuit reaches a second time threshold, wherein the first time threshold is longer than the second time threshold.

Abstract translation: 一种多相开关转换器，包括多个开关电路，比较电路和控制电路。 比较电路基于参考信号和多相开关转换器的输出电压产生比较信号。 控制电路只有在从当前开关电路接通到达第一时间阈值或者当前开关电路的关断时间达到第二时间阈值之后，才能基于比较信号接通以下开关电路，其中， 第一时间阈值比第二时间阈值长。