公开(公告)号：US20160141966A1

公开(公告)日：2016-05-19

申请号：US14943662

申请日：2015-11-17

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Chun-Shih Huang ,  Chang-Yu Wu ,  Pei-Yuan Chen

IPC: H02M3/335

CPC classification number: H02M3/33523 ,  H02M1/4258 ,  H02M2001/0009 ,  H02M2001/0025 ,  H02M2001/0032 ,  Y02B70/126 ,  Y02B70/16

Abstract: The present invention provides a flyback power converter, a secondary side control circuit, and a control method thereof. The flyback power converter converts an input voltage to an output voltage, and provides a load current to a load circuit. The flyback power converter includes: a transformer circuit, a power switch circuit, a switch current sense circuit, a primary side control circuit, and a secondary side control circuit. The secondary side control circuit adaptively adjusts a frequency of a zero of a compensator gain function and/or a mid-frequency gain of the compensator gain function according to the load current, such that a number of poles of a system open loop gain function of the flyback power converter is at most more than a number of zeroes of the system open loop gain function by one under a crossover frequency.

Abstract translation: 本发明提供一种反激式功率转换器，次级侧控制电路及其控制方法。 反激式功率转换器将输入电压转换为输出电压，并向负载电路提供负载电流。 反激式功率转换器包括：变压器电路，电源开关电路，开关电流检测电路，初级侧控制电路和次级侧控制电路。 次级侧控制电路根据负载电流自适应地调整补偿器增益功能的零频率和/或补偿器增益功能的中频增益，使得系统开环增益功能的极数为 反激式功率转换器在系统开环增益功能下最多不超过一个零的交叉频率。

公开(公告)号：US09564815B2

公开(公告)日：2017-02-07

申请号：US14943662

申请日：2015-11-17

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Chun-Shih Huang ,  Chang-Yu Wu ,  Pei-Yuan Chen

IPC: H02M3/335 ,  H02M1/00 ,  H02M1/42

CPC classification number: H02M3/33523 ,  H02M1/4258 ,  H02M2001/0009 ,  H02M2001/0025 ,  H02M2001/0032 ,  Y02B70/126 ,  Y02B70/16

Abstract: The present invention provides a flyback power converter, a secondary side control circuit, and a control method thereof. The flyback power converter converts an input voltage to an output voltage, and provides a load current to a load circuit. The flyback power converter includes: a transformer circuit, a power switch circuit, a switch current sense circuit, a primary side control circuit, and a secondary side control circuit. The secondary side control circuit adaptively adjusts a frequency of a zero of a compensator gain function and/or a mid-frequency gain of the compensator gain function according to the load current, such that a number of poles of a system open loop gain function of the flyback power converter is at most more than a number of zeroes of the system open loop gain function by one under a crossover frequency.

Abstract translation: 本发明提供一种反激式功率转换器，次级侧控制电路及其控制方法。 反激式功率转换器将输入电压转换为输出电压，并向负载电路提供负载电流。 反激式功率转换器包括：变压器电路，电源开关电路，开关电流检测电路，初级侧控制电路和次级侧控制电路。 次级侧控制电路根据负载电流自适应地调整补偿器增益功能的零频率和/或补偿器增益功能的中频增益，使得系统开环增益功能的极数为 反激式功率转换器在系统开环增益功能下最多不超过一个零的交叉频率。