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bq76925采集电芯电压始终比实际电芯的电压低0.3V左右

Other Parts Discussed in Thread: BQ76925

使用bq76925 配置ref_sel为1,采集到的参考电压是3.03V,但是采集到的每一节电芯电压都比实际电芯电压低0.3V左右,请问是什么原因造成的?

如图中所示,单节电池电压输出是3.5V但是实际是3.8V左右