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请教bq51050b使用问题

Other Parts Discussed in Thread: BQ51050B

实际使用中,bq51050b的输出VBAT是与电池一直连着的,如果不充电的时候,VBAT是没有电压输出的,那么电池的电压会不会倒灌进bq51050b呢?会不会导致一些问题呢?是否应该在输出与电池之间加个二极管呢?但是二极管有压降,加了二极管又导致电池端的充电电压达不到4.2V了。

求解!