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    ISOLATED SWITCHING CONVERTER WITH OPTOCOUPLER AND SECONDARY CONTROL CIRCUIT THEREOF
    1.
    发明申请
    ISOLATED SWITCHING CONVERTER WITH OPTOCOUPLER AND SECONDARY CONTROL CIRCUIT THEREOF 审中-公开

    公开(公告)号：US20170187298A1

    公开(公告)日：2017-06-29

    申请号：US15387621

    申请日：2016-12-21

    Applicant: Chengdu Monolithic Power Systems Co., Ltd.

    Inventor： Sicong Lin

    IPC: H02M3/335 ,  H02M1/32 ,  H02M1/08

    CPC classification number: H02M3/33553 ,  H02M1/08 ,  H02M1/32 ,  H02M3/33523 ,  H02M3/3376 ,  H02M2001/0009 ,  H02M2001/0048 ,  H02M2001/0058 ,  Y02B70/1491

    Abstract: An isolated switching converter includes a transformer, a primary circuit, a rectifying circuit and an optocoupler with a photo-sensitive device and a light emitting device, wherein the light emitting device has a first terminal coupled to an output voltage of the switching converter. A method for controlling the switching converter includes: sensing the output voltage and generating a voltage feedback signal; generating an error amplifying signal based on a reference signal and the voltage feedback signal, and providing the error amplifying signal to a second terminal of the light emitting device; disconnecting the error amplifying signal from the second terminal of the light emitting device if the error amplifying signal becomes lower than a first threshold voltage; and reconnecting the error amplifying signal to the second terminal of the light emitting device when the voltage reference signal becomes lower than a second threshold voltage.

    RESONANT CONVERTER, CONTROL CIRCUIT AND ASSOCIATED CONTROL METHOD WITH ADAPTIVE DEAD-TIME ADJUSTMENT
    4.
    发明申请
    RESONANT CONVERTER, CONTROL CIRCUIT AND ASSOCIATED CONTROL METHOD WITH ADAPTIVE DEAD-TIME ADJUSTMENT 有权
    谐波转换器，控制电路及相关停电调整的相关控制方法

    公开(公告)号：US20160087543A1

    公开(公告)日：2016-03-24

    申请号：US14857405

    申请日：2015-09-17

    Applicant: Chengdu Monolithic Power Systems Co., Ltd.

    Inventor： Yiqing Jin ,  Yuedong Chen ,  Sicong Lin

    IPC: H02M3/335

    CPC classification number: H02M3/337 ,  H02M1/38 ,  H02M3/335 ,  H02M2001/0058 ,  Y02B70/1433 ,  Y02B70/1491

    Abstract: A resonant converter has a switching circuit having a first switch and a second switch, a control circuit and a resonant circuit. The control circuit has a slope sensing circuit providing a slope sense signal based on a voltage variation at the common node of the first switch and the second switch, a slope judge circuit providing a slope judge signal, and a turn-ON control circuit providing a first reset signal to adjust a first dead-time period from turning OFF the first switch to turning ON the second switch based on the slope judge signal, the slope signal, and a current flowing through the resonant tank, and providing a second reset signal to adjust a second dead-time period from turning OFF the second switch to turning ON the first switch based on the slope judge signal, the slope signal, and the current flowing through the resonant tank.

    Abstract translation: 谐振转换器具有开关电路，其具有第一开关和第二开关，控制电路和谐振电路。 控制电路具有斜坡检测电路，该斜坡检测电路基于第一开关和第二开关的公共节点处的电压变化提供斜率检测信号，斜率判断电路提供斜率判断信号，以及导通控制电路， 第一复位信号，以基于所述斜率判断信号，所述斜率信号和流过所述谐振回路的电流来调节第一死区时间段，使第一开关断开以接通所述第二开关，以及将第二复位信号提供给 基于斜率判断信号，斜率信号和流过谐振回路的电流，调整第二死区时间，使第二开关断开，使第一开关接通。

    Resonant converter, control circuit and associated control method with adaptive dead-time adjustment
    8.
    发明授权
    Resonant converter, control circuit and associated control method with adaptive dead-time adjustment 有权
    谐振转换器，控制电路及相应的控制方法，具有自适应死区时间调整功能

    公开(公告)号：US09525358B2

    公开(公告)日：2016-12-20

    申请号：US14857405

    申请日：2015-09-17

    Applicant: Chengdu Monolithic Power Systems Co., Ltd.

    Inventor： Yiqing Jin ,  Yuedong Chen ,  Sicong Lin

    IPC: H02M3/335 ,  H02M3/337 ,  H02M1/38 ,  H02M1/00

    CPC classification number: H02M3/337 ,  H02M1/38 ,  H02M3/335 ,  H02M2001/0058 ,  Y02B70/1433 ,  Y02B70/1491

    Abstract: A resonant converter has a switching circuit having a first switch and a second switch, a control circuit and a resonant circuit. The control circuit has a slope sensing circuit providing a slope sense signal based on a voltage variation at the common node of the first switch and the second switch, a slope judge circuit providing a slope judge signal, and a turn-ON control circuit providing a first reset signal to adjust a first dead-time period from turning OFF the first switch to turning ON the second switch based on the slope judge signal, the slope signal, and a current flowing through the resonant tank, and providing a second reset signal to adjust a second dead-time period from turning OFF the second switch to turning ON the first switch based on the slope judge signal, the slope signal, and the current flowing through the resonant tank.

    Abstract translation: 谐振转换器具有开关电路，其具有第一开关和第二开关，控制电路和谐振电路。 控制电路具有斜坡检测电路，该斜坡检测电路基于第一开关和第二开关的公共节点处的电压变化提供斜率检测信号，斜率判断电路提供斜率判断信号，以及导通控制电路， 第一复位信号，以基于所述斜率判断信号，所述斜率信号和流过所述谐振回路的电流来调节第一死区时间段，使第一开关断开以接通所述第二开关，以及将第二复位信号提供给 基于斜率判断信号，斜率信号和流过谐振回路的电流，调整第二死区时间，使第二开关断开，使第一开关接通。

    Multi-mode PFC control and control method thereof
    9.
    发明授权
    Multi-mode PFC control and control method thereof 有权
    多模PFC控制及其控制方法

    公开(公告)号：US09479046B2

    公开(公告)日：2016-10-25

    申请号：US14222451

    申请日：2014-03-21

    Applicant: Chengdu Monolithic Power Systems Co., Ltd.

    Inventor： Sicong Lin ,  Yiqing Jin ,  Yuancheng Ren ,  Junming Zhang

    IPC: H02M1/42 ,  H02M1/40

    CPC classification number: H02M1/4225 ,  H02M1/40 ,  H02M1/42 ,  Y02B70/126 ,  Y02P80/112

    Abstract: A PFC circuit includes: a switching circuit having a power switch; an on time control circuit for controlling an on time period of the power switch; a first off time control circuit; a second off time control circuit; and a logic circuit selectively controls the power switch working under CCM or DCM; when working under CCM, the first off time control circuit controls an off time period of the power switch and when working under DCM, the second off time control circuit controls the off time period of the power switch.

    Abstract translation: PFC电路包括：具有电源开关的开关电路; 用于控制电源开关的接通时间段的准时控制电路; 第一关断时间控制电路; 第二关闭时间控制电路; 并且逻辑电路选择性地控制在CCM或DCM下工作的电源开关; 当在CCM下工作时，第一关闭时间控制电路控制电源开关的关闭时间段，并且在DCM下工作时，第二关断时间控制电路控制电源开关的关闭时间段。

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