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BQ25896的奇怪问题

Other Parts Discussed in Thread: BQ25896

BQ25896的板子,贴了3块,其中有一块有如下异常现象:

有插入电池的话,正常;没有插入电池,只接USB充电,则异常,异常现象如下:

1、PG和STAT都是0V,VBUS=4.91V,REGN=4.66V,QON=3.13V;

2、SYS=1.8V,异常,波形如下

3、OTG=1.85V,异常,波形如下