公开(公告)号：US20160190936A1

公开(公告)日：2016-06-30

申请号：US14623501

申请日：2015-02-17

Applicant: Power Forest Technology Corporation

Inventor： Po-Jen Ke

IPC: H02M3/335

CPC classification number: H02M3/33507 ,  H02M1/32

Abstract: A power conversion apparatus including a flyback power conversion circuit, a control chip and a detection auxiliary circuit is provided. The flyback power conversion circuit receives and converts an input voltage into a DC output voltage. The control chip generates a PWM signal in response to a power supplying requirement to control the operation of the flyback power conversion circuit, wherein the control chip has a single multi-function detection pin. The detection auxiliary circuit assists the control chip to obtain a first detection voltage via the multi-function detection pin, such that the control chip performs a detection of an over temperature protection (OTP) and a detection of an over voltage protection (OVP) synchronously according to the first detection voltage. The first detection voltage is related to the DC output voltage or a thermal voltage of an environment temperature.

Abstract translation: 提供一种包括反激式电力转换电路，控制芯片和检测辅助电路的电力转换装置。 反激式功率转换电路接收并将输入电压转换为直流输出电压。 控制芯片响应于供电要求而产生PWM信号，以控制反激式功率转换电路的操作，其中控制芯片具有单个多功能检测引脚。 检测辅助电路通过多功能检测引脚帮助控制芯片获得第一检测电压，使得控制芯片同时执行过温保护（OTP）检测和过电压保护（OVP）检测 根据第一检测电压。 第一检测电压与直流输出电压或环境温度的热电压有关。