公开(公告)号：US20160069938A1

公开(公告)日：2016-03-10

申请号：US14822382

申请日：2015-08-10

Applicant: Richtek Technology Corporation

Inventor： Hsin-Yi WU ,  Chien-Fu TANG ,  Isaac Y. CHEN

IPC: G01R19/165 ,  H02H3/087 ,  H02M1/32

CPC classification number: G01R19/165 ,  H02M1/32 ,  H02M1/4258 ,  H02M3/33507 ,  H02M7/217 ,  Y02B70/126

Abstract: A parameter setting and circuit protecting method applied in a power converter are disclosed. An input voltage of the power converter is detected to generate a first detecting signal related to the input voltage. The first detecting signal will be thence compared with a threshold so as to generate a protecting signal for protecting the power converter. When a parameter setting signal is triggered, a current is provided so as to make the first detecting signal to generate a variation, thereby setting a parameter in accordance with the variation.

Abstract translation: 公开了一种应用在功率转换器中的参数设置和电路保护方法。 检测功率转换器的输入电压以产生与输入电压相关的第一检测信号。 第一检测信号将与阈值进行比较，以产生用于保护功率转换器的保护信号。 当触发参数设定信号时，提供电流，使第一检测信号产生变化，从而根据变化设定参数。

公开(公告)号：US20150162843A1

公开(公告)日：2015-06-11

申请号：US14560774

申请日：2014-12-04

Applicant: Richtek Technology Corporation

Inventor： Isaac Y. CHEN ,  Chien-Fu TANG ,  Hsin-Yi WU

IPC: H02M3/335

CPC classification number: H02M3/33523 ,  H02M1/32 ,  H02M2001/0022

Abstract: A control circuit for a power converting circuit includes a multifunctional pin, a pulse-width-modulation (PWM) signal generating circuit, a voltage detecting circuit and a zero current detecting circuit. The voltage detecting circuit detects a signal on the multifunctional pin. When the signal on the multifunctional pin is greater than a predetermined value, the voltage detecting circuit configures the PWM signal generating circuit to intermittently conduct a current switch of the power converting circuit. The zero current detecting circuit detects the signal of the multifunctional pin to determine the conduction status of the current switch. When the signal of the multifunctional pin is less than the predetermined value, the voltage detecting circuit configures the PWM signal generating circuit to turn off the current switch.

Abstract translation: 电力转换电路的控制电路包括多功能引脚，脉冲宽度调制（PWM）信号发生电路，电压检测电路和零电流检测电路。 电压检测电路检测多功能引脚上的信号。 当多功能引脚上的信号大于预定值时，电压检测电路将PWM信号产生电路配置为间歇地导通电力转换电路的电流开关。 零电流检测电路检测多功能引脚的信号，以确定电流开关的导通状态。 当多功能引脚的信号小于预定值时，电压检测电路配置PWM信号产生电路以关断电流开关。

公开(公告)号：US20240120844A1

公开(公告)日：2024-04-11

申请号：US18298340

申请日：2023-04-10

Applicant: Richtek Technology Corporation

Inventor： Kun-Yu LIN ,  Ta-Yung YANG ,  Yu-Chang CHEN ,  Hsin-Yi WU ,  Fu-Ciao SYU ,  Chia-Hsien YANG

IPC: H02M3/335 ,  H02M1/00 ,  H02M1/32 ,  H02M3/00

CPC classification number: H02M3/33571 ,  H02M1/0009 ,  H02M1/32 ,  H02M3/01 ,  H02M3/33592

Abstract: A resonant flyback power converter includes: a first and a second transistors which form a half-bridge circuit for switching a transformer and a resonant capacitor to generate an output voltage; a current-sense device for sensing a switching current of the half-bridge circuit to generate a current-sense signal; and a switching control circuit generating a first and a second driving signals for controlling the first and the second transistors. The turn-on of the first driving signal controls the half-bridge circuit to generate a positive current to magnetize the transformer and charge the resonant capacitor. The turn-on of the second driving signal controls the half-bridge circuit to generate a negative current to discharge the resonant capacitor. The switching control circuit turns off the first transistor when the positive current exceeds a positive-over-current threshold, and/or, turns off the second transistor when the negative current exceeds a negative-over-current threshold.