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BQ25601: BQ25601RTWR (RBFET, Q1)反向漏电

Part Number: BQ25601


充电方案 :BUCK Charge BQ25601  + SC Charge SC8545  实现22.5W 充电,  现在出现充电BUCK IC 失效,目前分析初步定位到 下电VUSB 5V后,在VUSB端口还可以测试 4.2V 电源。导致系统还是识别充电器在位,但实际再次插入没有充电电流。请问该如何分析?