FEEDBACK CIRCUIT AND CONTROL METHOD FOR AN ISOLATED POWER CONVERTER
    1.
    发明申请
    FEEDBACK CIRCUIT AND CONTROL METHOD FOR AN ISOLATED POWER CONVERTER 有权
    用于隔离电源转换器的反馈电路和控制方法

    公开(公告)号:US20110018590A1

    公开(公告)日:2011-01-27

    申请号:US12838988

    申请日:2010-07-19

    IPC分类号: H02M11/00

    CPC分类号: H02M3/33523

    摘要: A feedback circuit for an isolated power converter includes an opto-coupler and a reversed polarity regulator. The opto-coupler provides a current related to an output voltage of the isolated power converter. When the isolated power converter enters light load, the output voltage rises and the reversed polarity regulator reduces the current to decrease the power consumption and thus improve the light load efficiency of the isolated power converter.

    摘要翻译: 用于隔离电力转换器的反馈电路包括光耦合器和反极性调节器。 光耦合器提供与隔离功率转换器的输出电压相关的电流。 当隔离电源转换器进入轻负载时,输出电压升高,反极性调节器降低电流以降低功耗,从而提高隔离电源转换器的轻负载效率。

    CONTROL CIRCUIT AND METHOD FOR A FLYBACK POWER CONVERTER
    2.
    发明申请
    CONTROL CIRCUIT AND METHOD FOR A FLYBACK POWER CONVERTER 有权
    飞控电源转换器的控制电路和方法

    公开(公告)号:US20100008110A1

    公开(公告)日:2010-01-14

    申请号:US12500019

    申请日:2009-07-09

    IPC分类号: H02M3/335

    CPC分类号: H02M3/33523 H02M2001/0022

    摘要: A flyback power converter includes a power switch connected to a primary side of a transformer, and a sensing signal is provided for a control circuit to switch the power switch so as for the transformer to convert an input voltage into an output voltage. The sensing signal is a function of the input voltage, and the control circuit extracts a variation of the sensing signal during a preset time period. The variation of the sensing signal is used to prevent the output ripple and the green mode entry point of the flyback power converter from varying with the input voltage.

    摘要翻译: 反激式功率转换器包括连接到变压器的初级侧的电源开关,并且为控制电路提供感测信号以切换电源开关,以使变压器将输入电压转换为输出电压。 感测信号是输入电压的函数,并且控制电路在预设时间段内提取感测信号的变化。 感测信号的变化用于防止反激式功率转换器的输出纹波和绿色模式入口点随输入电压而变化。

    CIRCUIT AND METHOD FOR PREDICTING A VALLEY TIMING FOR A VOLTAGE ACROSS A SWITCHING DEVICE
    4.
    发明申请
    CIRCUIT AND METHOD FOR PREDICTING A VALLEY TIMING FOR A VOLTAGE ACROSS A SWITCHING DEVICE 有权
    用于预测开关装置中的电压的谷值时序的电路和方法

    公开(公告)号:US20110095735A1

    公开(公告)日:2011-04-28

    申请号:US12986648

    申请日:2011-01-07

    申请人: TZU-CHEN LIN

    发明人: TZU-CHEN LIN

    IPC分类号: G05F1/46

    摘要: Disclosed are circuits and methods for use in a control circuit of a switching mode power supply for turning on a switching device in the switching mode power supply when the voltage across the switching device is at a minimum. A voltage detector is provided for detecting the voltage across the switching device to produce a detection voltage which is a function of the voltage across the switching device, and circuit arrangement is used to predict a valley timing for the voltage across the switching device by evaluating the time period that the detection voltage falls down from a first threshold to a second threshold.

    摘要翻译: 公开了用于开关模式电源的控制电路中的电路和方法,用于当开关装置两端的电压为最小时在开关模式电源中接通开关装置。 提供电压检测器用于检测开关装置两端的电压,以产生检测电压,该检测电压是开关装置两端的电压的函数,电路装置用于通过评估开关装置的电压来预测开关装置两端的电压的谷值时序 检测电压从第一阈值下降到第二阈值的时间段。

    PROTECTION APPARATUS AND METHOD FOR A POWER CONVERTER
    5.
    发明申请
    PROTECTION APPARATUS AND METHOD FOR A POWER CONVERTER 有权
    电源转换器的保护装置和方法

    公开(公告)号:US20090279214A1

    公开(公告)日:2009-11-12

    申请号:US12437934

    申请日:2009-05-08

    IPC分类号: H02H9/02

    CPC分类号: H02M1/32

    摘要: A power converter uses a PWM controller to provide a driver output to modulate the duty of the power converter. A protection apparatus and method compare a current sense input of the PWM controller with a reference voltage to assert a signal representing failure, count the number of cycles where the signal representing failure is asserted, and reset an enable signal to inhibit the driver output if the signal representing failure is asserted in several cycles.

    摘要翻译: 电源转换器使用PWM控制器提供驱动器输出来调制功率转换器的占空比。 一种保护装置和方法,将PWM控制器的电流检测输入与参考电压进行比较,以断言表示故障的信号,计数表示故障的信号的周期数,并复位使能信号以禁止驱动器输出,如果 表示故障的信号在几个周期内被断言。

    APPARATUS AND METHOD FOR STANDBY POWER REDUCTION OF A FLYBACK POWER CONVERTER
    6.
    发明申请
    APPARATUS AND METHOD FOR STANDBY POWER REDUCTION OF A FLYBACK POWER CONVERTER 有权
    逆变电源转换器的停电功率降低的装置和方法

    公开(公告)号:US20110051463A1

    公开(公告)日:2011-03-03

    申请号:US12852628

    申请日:2010-08-09

    IPC分类号: H02M3/335

    摘要: An apparatus and method for a flyback power converter reduce the standby output voltage of the flyback power converter by switching the reference voltage provided by a shunt regulator of the flyback power converter or the ratio of voltage divider resistors of the shunt regulator, to reduce the standby power consumption by an output feedback circuit of the flyback power converter, the shunt regulator, and the voltage divider resistors, and thereby the power loss of the flyback power converter in standby mode.

    摘要翻译: 用于回扫功率转换器的装置和方法通过切换由回扫功率转换器的并联调节器提供的参考电压或分流调节器的分压电阻器的比例来减小反激式功率转换器的备用输出电压,以减少待机 反激式功率转换器的输出反馈电路,并联稳压器和分压电阻器的功耗,从而在待机模式下的反激式功率转换器的功率损耗。