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Why PACK CUV protection funtion did not work ?

Hi,

    My circuit design as below:

    Charge and discharge circuit is separate,p+ is connected PACK Pin with R56(10K),CH+ is connected PACK Pin with R8(10K),

    if R56 did not weld,CUV protection funtion did not work,p+ did not turn off.

    if R56 and R8 all weld,CUV protection funtion did not work, and p+ turn off immediately then open again. please see the attachment video.

     if R56  weld,but R8 did not weld, CUV protection funtion work normal.

Why is that? Thanks!