功放电源电路

申请公布号：CN204168168U

申请号：CN201420530899.3

申请日期：2014.09.16

申请公布日期：2015.02.18

申请人：

广州杰士莱电子有限公司

发明人：李杨春

分类号：H02M7/02(2006.01)I;H02H7/20(2006.01)I

主分类号：H02M7/02(2006.01)I

代理机构：

广州中浚雄杰知识产权代理有限责任公司 44254

代理人：王新宪

地址：510890 广东省广州市花都区花东镇金田工业区8号

摘要：一种功放电源电路，包括供电支路和检测支路，所述供电支路包括变压电路、整流电路和滤波电路，外部电源信号依次通过变压电路、整流电路、滤波电路后供给左功放板、右功放板和输入板；所述检测支路包括软启动电路、烧机保护电路，外部220V交流电通过软启动电路和烧机保护电路输入到变压器，所述烧机保护电路检测左、右功放板发射极电阻的两端电压。本实用新型通过检测功放板发射极电阻的两端电压，以判断功放板是否处于危险状态，并通过烧机保护电路来切断电源的供电，防止功放发生烧机。

主权项：一种功放电源电路，其特征在于：包括供电支路和检测支路，所述供电支路包括变压电路、整流电路和滤波电路，外部电源信号依次通过变压电路、整流电路、滤波电路后供给左功放板、右功放板和输入板；所述检测支路包括软启动电路、烧机保护电路，外部220V交流电通过软启动电路和烧机保护电路输入到变压器，所述烧机保护电路检测左、右功放板发射极电阻的两端电压。

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