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BQ24074在不充电时不能输出4.4v

Other Parts Discussed in Thread: BQ24074

原理图如下图。

在充电时(Vin = 5v),Vout输出电压约为4.4v,但是在不充电时,Vout输出电压为电池的电压,而不是手册里说的固定输出4.4V。