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BQ25703A 电池充电问题

Other Parts Discussed in Thread: BQ25703A

现象:

1.我这边的板子先接直流电源,再连接电池,现在还是直流电源供电,看的出电池在充电;

2.断开直流电源,BQ25703A能切换到电池供电;

3.再次接入直流电源,BQ25703A 不能切换到直流电源供电???

请问:是还需要做什么配置吗???谢谢各位指导