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BQ25606: BQ25606 STAT,PG脚问题

Part Number: BQ25606

BQ25606 STAT,PG脚问题;

      电路调试测试好,不断反复充电后几周,再插上USB,USB电压正常5V,PG脚没有变低电平(有上拉电源,用的是SYS脚的),STAT脚乱闪(电池完全借入),看现象是BQ25606这几个脚损坏,是哪里引起的原因,之前一直可以用的。