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BQ76940放电时第1节电池采样有误差

Other Parts Discussed in Thread: BQ76940

各位,我在应用BQ76940这款芯片时,发现在放电(电流10A-50A)时,第1节电压误差较大,其他电压采集正常。

如下面2张图所示,放电时用万用表量C48两端电压和用BQ76940测出的电压有100多mV的误差。

在不放电的情况下,误差在5mV的范围内。