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    Synchronous rectifier control with adaptive minimum off-time
    4.
    发明授权
    Synchronous rectifier control with adaptive minimum off-time 有权

    公开(公告)号：US10079548B2

    公开(公告)日：2018-09-18

    申请号：US15413042

    申请日：2017-01-23

    Applicant: DIALOG SEMICONDUCTOR INC.

    Inventor： Pengju Kong ,  Hien Bui ,  Hanguang Zhang

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

    CPC classification number: H02M3/33592 ,  H02M1/08 ,  H02M2001/0048 ,  H02M2001/0054 ,  Y02B70/1433 ,  Y02B70/1475 ,  Y02B70/1491

    Abstract: A switching power converter may include a power switch coupled to a primary winding of a transformer, and a primary controller configured to turn on and off the power switch, a synchronous rectifier switch coupled to a secondary winding of a transformer, and a synchronous rectifier controller configured to turn on and off the synchronous rectifier switch. The synchronous rectifier controller may monitor a voltage across the synchronous rectifier switch. The synchronous rectifier controller may determine a period of a resonant oscillation of the voltage across the synchronous rectifier switch following at least one cycling off of the synchronous rectifier switch. The synchronous rectifier controller may adjust the minimum off-time period for the synchronous rectifier switch based on the period of the resonant oscillation. The synchronous rectifier controller may adaptively adjust a minimum off-time period for the synchronous rectifier switch.

    Secondary-Side Dynamic Load Detection and Communication Device
    7.
    发明申请
    Secondary-Side Dynamic Load Detection and Communication Device 有权
    次级动态负载检测和通信设备

    公开(公告)号：US20160028313A1

    公开(公告)日：2016-01-28

    申请号：US14340482

    申请日：2014-07-24

    Applicant: Dialog Semiconductor Inc.

    Inventor： Pengju Kong ,  Yong Li

    IPC: H02M3/335

    CPC classification number: H02M3/33507 ,  H02M1/08 ,  H02M3/33592 ,  H02M2001/0009 ,  H02M2001/0032 ,  Y02B70/16

    Abstract: A switching power converter provides regulated voltage to a load. The switching power converter comprises a transformer including a primary winding coupled to an input voltage and a secondary winding coupled to an output of the switching power converter. The switching power converter further comprises a power switch coupled to the primary winding and a rectifier coupled to the secondary winding. Current is generated in the primary winding responsive to the power switch being turned on and not generated responsive to the power switch being turned off. A detection circuit measures a voltage across the rectifier. If the detection circuit detects a decrease in the voltage across the rectifier outside of a blanking period, the detection circuit generates a current pulse in the secondary winding of the transformer.

    Abstract translation: 开关电源转换器为负载提供稳压电压。 开关功率转换器包括变压器，其包括耦合到输入电压的初级绕组和耦合到开关功率转换器的输出的次级绕组。 开关功率转换器还包括耦合到初级绕组的功率开关和耦合到次级绕组的整流器。 响应于电源开关导通而在初级绕组中产生电流，并且响应于电源开关被关闭而不产生电流。 检测电路测量整流器两端的电压。 如果检测电路检测到在消隐期之外的整流器两端的电压的降低，则检测电路在变压器的次级绕组中产生电流脉冲。

    System for turning off a synchronous rectifier based on a primary switch turn-on detection
    9.
    发明授权
    System for turning off a synchronous rectifier based on a primary switch turn-on detection 有权

    公开(公告)号：US11601061B2

    公开(公告)日：2023-03-07

    申请号：US16784108

    申请日：2020-02-06

    Applicant: DIALOG SEMICONDUCTOR INC.

    Inventor： Pengju Kong ,  Qingqing Zong

    IPC: H02M3/335 ,  H02M1/00

    Abstract: A system for turning off a synchronous rectifier (SR) based on a primary switch (PS) turn-on detection in a flyback converter having a primary-side and a secondary-side is disclosed. The system comprises the PS on the primary-side, the SR on the secondary-side, a spike detector, and a SR controller. The SR is configured to produce a drain-to-source voltage (VDS). The spike detector is in signal communication with an output capacitor (Cout) on the secondary-side and the spike detector is configured to detect a voltage spike of an output voltage (VOut) across the Cout that is indicative of the PS being turned-on. The SR controller is in signal communication with the SR and the spike detector and the SR controller is configured to turn-off the SR based on the spike detector detecting the voltage spike of the VOut.

    System and method for determining a primary switching event in an isolated converter
    10.
    发明授权
    System and method for determining a primary switching event in an isolated converter 有权

    公开(公告)号：US11223284B2

    公开(公告)日：2022-01-11

    申请号：US16779459

    申请日：2020-01-31

    Applicant: DIALOG SEMICONDUCTOR INC.

    Inventor： Kuangzhe Xu ,  Pengju Kong ,  Jiandong Zhang ,  Hien Bui

    IPC: H02M3/335

    Abstract: Disclosed is a system for determining a primary switching event in an isolated converter having a primary-side and a secondary-side. The system includes a primary-switch (PS) on the primary-side, a synchronous rectifier (SR) on the secondary-side, an integration circuit, and a SR controller. The integration circuit is in signal communication with the SR on the secondary-side and the SR controller is in signal communication with the SR and the integration circuit. The SR is configured to produce a drain-to-source voltage (VDS) and the integration circuit is configured to integrate a difference between the VDS and a output voltage (VOut) (produced by the secondary-side) over time to produce a VDS over time value (VTime). The SR controller is configured to determine if the VDS is greater than a first threshold voltage (VTH) and determine the primary switching event when the VTime is greater than a second threshold voltage (VSTH).

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