具有过电流与过电压保护功能的升压装置;BOOST APPARATUS WITH OVER-CURRENT AND OVER-VOLTAGE PROTECTION FUNCTION

摘要

一种升压装置，包括：升压式电源转换线路，其具有与负载耦接的第一二极体，且经配置以接收直流输入电压，并反应于脉宽调变讯号而提供直流输出电压给负载；复合功能侦测线路，其耦接第一二极体的阳极，且经配置以侦测直流输出电压是否过压以及侦测第一二极体是否发生开路，并据以提供侦测讯号；以及控制晶片，其经配置以：产生脉宽调变讯号来控制升压式电源转换线路的运作；以及反应于侦测讯号而于第一二极体发生开路或直流输出电压过压时，停止输出脉宽调变讯号并进入关闭状态，从而保护升压装置及/或负载免于损毁。; a complex function detection circuit coupled to an anode of the first diode and configured to detect whether the DC output voltage is over-voltage and to detect whether the first diode is open-circuit and accordingly provide a detection signal; and a control chip configured to: generate the PWM signal to control the operation of the boost power conversion circuit; and stop outputting the PWM signal and enter into a shutdown status in response to the detection signal when the first diode is open-circuit or the DC output voltage is over-voltage, and thus protecting the boost apparatus and/or the load from damaging.