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急急急,sn27546 电压校准偏差问题



请教下,sn27546可以校准电压电流,电流校准后精度没问题,而电压校准后,电压精度偏下限(BQ电压3798mV小于开路电压3800mV),

这是哪里出问题了,是设备输出不准还是校准方法不对?