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bq24105~Q1出现只输出3.3V情况

Other Parts Discussed in Thread: BQ24105

          用bq24105~Q1做了3节锂电池管理,VIN为14.4V,要求输出12左右V,会正常输出12V,但有时会一直输出3.3v,带不动系统,把锂电池焊下,重点一下就会OK,

好像跟 电池检测有关,为可能什么原因造成的??电路为典型电路