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BQ4050EVM-561: bq4050设置xchg后,为什么还能充电?

Part Number: BQ4050EVM-561
Other Parts Discussed in Thread: BQ4050

bq4050设置xchg=1后,为什么还能充电呢,电流不应该为0?

充电电源没有拨掉,看到还有充电电流,有50mA左右。