LTC6803-3测量最后一节电池电压偏小200mV左右

使用LTC6803-3测量10节串联电池电压,前9节电压都正常,最后一节电压测量值偏小200mV,不知道什么原因会导致该现象

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    •  Analog Employees 
    on May 3, 2021 6:27 PM

    This will typically be caused by supply current in the top cell sensing path. To avoid this, the supply pin should have its own filtering elements, not shared with the top cell sense input. This is done correctly on the demo board, so if the demoboard is doing this then it may be that the CELL12 connection is not tied to the top cell potential.