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BQ76PL455A-Q1采集超过12单体

大家好, BQ76PL455采集9-16V单体电压时,使用电阻分压然后用4个通道采样。静态测量时,可以正常使用,动态时,最后一节电压会采样偏低,用万用表测量13 14 15 16 节电压时,13节出现负压0.3v左右。14节2.2V左右 后面两节分为5.4左右。静态是电压都是平均分配,为什么动态却出现问题?