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BQ76PL455AQ1上电问题



我参照的TIDA-00817做的板子,在初次上电,我在BQ76PL455AQ1的VP脚对地加5V,为何电流230mA,其他脚位全部悬空,然后改变为5.3V后,上电电流也很大,但只是一瞬间,过后只有几个mA,并且再次修改为5V上电后,电流也只有几个mA。这到底是为何。我能确定上述初次加5V电压230mA情况反复出现。