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BQ24703: 使用BQ24703芯片做锂电池充放电管理电路问题

Part Number: BQ24703


用BQ24703芯片对三串两并18650锂电池进行充当电管理,照抄的T官方的测试原理图(HPA093)

现在有2个问题,

1、设定BATDEP引脚电池耗尽电压为9V,但是当电池电压低于9V时,电池还继续供电,不能实现断电,保护电池的功能;

2、ALARM引脚,外接AC并且接电池,电池电压大于9V,偶尔上电会出现ALARM报警灯亮,按理不处于报警的阈值,ALARM低电平,但是报警灯亮;

     当只有电池供电时,当电池电压低于9V,低于报警的阈值,这是ALARM引脚如何拉成高电平;