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BQ24080充电芯片如何检测电池?

Other Parts Discussed in Thread: BQ24080

使用BQ24080充电芯片时候,电池通过ADC连接到MCU,打开CE使能管脚,可以给电池自动充电,ADC检测也正常,但是拔掉电池,ADC同样可以检测到4.2V,这样就不能有效检测电池是否存在,在CE使能管脚打开的情况下,怎样检测有没有连接电池?