想要实现:电池非满电情况下,插入VBUS可以给电池充电,SYS 由VBUS提供。
问题描述:先接VBUS,再接电池,可以正常充电。但是先接电池,再接VBUS无法进行充电。VBUS 5.2V 电池满电时4.2V 电池当前电源3.9V
其他信息:SYS 负载190ma 电路图如下:
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