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    RESONANT CONVERTER, CONTROL CIRCUIT AND ASSOCIATED CONTROL METHOD WITH ADAPTIVE DEAD-TIME ADJUSTMENT
    21.
    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。

    X capacitor discharging circuit and method thereof
    22.
    发明授权
    X capacitor discharging circuit and method thereof 有权

    公开(公告)号：US11502538B2

    公开(公告)日：2022-11-15

    申请号：US16927687

    申请日：2020-07-13

    Applicant: Chengdu Monolithic Power Systems Co., Ltd.

    Inventor： Yuedong Chen

    IPC: H02J7/34 ,  H02J7/00 ,  H02M1/32 ,  H02M1/44 ,  H02M7/06

    Abstract: A discharge circuit for an X capacitor has a first voltage detection circuit providing a first indicating signal based on a voltage across two input terminals of a switching converter to indicate whether the two input terminals are connected to an AC power source, and a discharge module starting a discharge operation on the X capacitor based on first indicating signal, and the discharge operation discharges the X capacitor during a first time period, and stops discharging the X capacitor and compares a sampled signal with the voltage across the two input terminals during a following second time period.

    Circuit with slope sensing for driving synchronous rectifier device
    23.
    发明授权
    Circuit with slope sensing for driving synchronous rectifier device 有权

    公开(公告)号：US11381151B2

    公开(公告)日：2022-07-05

    申请号：US17113214

    申请日：2020-12-07

    Applicant: Chengdu Monolithic Power Systems Co., Ltd.

    Inventor： Jiayou Ye ,  Yuedong Chen ,  Hui Li

    IPC: H02M1/08 ,  H02M3/335 ,  H02M1/00 ,  H02M1/32 ,  H02M1/34 ,  H02M7/217

    Abstract: A driving circuit for driving a synchronous rectifier device. The driving circuit may include a controllable charging circuit and a slope sensing circuit. The slope sensing circuit may sense whether an abrupt rising change in a voltage drop from a sensing terminal to a reference ground terminal of the driving circuit is occurring, and provide a slope sensing signal in response to a rising edge of the abrupt rising change in the voltage drop. The controllable charging circuit may receive the slope sensing signal and provide a charging current to a supply terminal of the driving circuit in response to each rising edge of the abrupt rising change in the voltage drop.

    SYNCHRONOUS RECTIFICATION CIRCUIT AND THE METHOD THEREOF
    24.
    发明申请
    SYNCHRONOUS RECTIFICATION CIRCUIT AND THE METHOD THEREOF 有权

    公开(公告)号：US20220158565A1

    公开(公告)日：2022-05-19

    申请号：US17521000

    申请日：2021-11-08

    Applicant: Chengdu Monolithic Power Systems Co., Ltd.

    Inventor： Yuedong Chen

    IPC: H02M3/335 ,  H02M1/08 ,  H02M1/36

    Abstract: A synchronous rectifier control circuit, used with a synchronous rectification circuit having a primary switch and a synchronous rectifier, having: a drain-source threshold setting circuit, configured to provide a dynamic drain-source voltage threshold based on a drain-source voltage across the synchronous rectifier; a primary switch detecting circuit, configured to provide a primary switch state indicating signal based on a comparison result of the drain-source voltage and the dynamic drain-source voltage threshold; and an on-control circuit, configured to provide a synchronous on signal to turn on the synchronous rectifier when the drain-source voltage decreases to the turn-on threshold, on the premise that the primary switch state indicating signal indicates an on state of the primary switch.

    Resonant converter with capacitive mode control and associated control method
    26.
    发明授权
    Resonant converter with capacitive mode control and associated control method 有权

    公开(公告)号：US09812975B2

    公开(公告)日：2017-11-07

    申请号：US15272418

    申请日：2016-09-21

    Applicant: Chengdu Monolithic Power Systems Co., Ltd.

    Inventor： Yuedong Chen

    IPC: H02M1/088 ,  H02M3/335 ,  H02M1/00

    CPC classification number: H02M3/33546 ,  H02M1/088 ,  H02M3/3376 ,  H02M2001/0009 ,  H02M2001/0058 ,  Y02B70/1433 ,  Y02B70/1491

    Abstract: A control circuit used for controlling a resonant converter. The control circuit has a setting capacitor, N up thresholds and N low thresholds. If the resonant converter operates in the inductive mode, a setting voltage signal across the setting capacitor is respectively compared with the largest one of the N up thresholds and the smallest one of the N low thresholds in each operation cycle to generate a high-side control signal and a low-side control signal for controlling a high-side switch and a low-side switch of the resonant converter. If the resonant converter enters into the capacitive mode, the setting voltage signal is respectively compared with each of the N up thresholds and each of the N low thresholds operation cycle by operation cycle to generate the high-side control signal and the low-side control signal.

    SWITCH CONTROL CIRCUIT AND POWER CONVERTER COMPRISING THE SAME
    29.
    发明公开
    SWITCH CONTROL CIRCUIT AND POWER CONVERTER COMPRISING THE SAME 审中-公开

    公开(公告)号：US20230231486A1

    公开(公告)日：2023-07-20

    申请号：US18084835

    申请日：2022-12-20

    Applicant: Chengdu Monolithic Power Systems Co., Ltd.

    Inventor： Yuedong Chen ,  Junlin Qian

    IPC: H02M3/335 ,  H02M1/088

    CPC classification number: H02M3/33592 ,  H02M1/088

    Abstract: A power converter includes a switch control circuit for driving a high side switch of the power converter comprising the high side switch and a low side switch connected in series. The switch control circuit may have a first terminal for receiving an input signal, a second terminal used as a reference ground terminal of the switch control circuit, and a third terminal used as an output terminal to provide a driving signal, the switch control circuit can draw power from the input signal and may be configured to control a logic state of the driving signal based on a logic state of the input signal relative to a reference ground signal at the second terminal or based on a current flowing through the first terminal.

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