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bq24133无法正常充电



TI FAE,你们好!请帮忙查看原因,谢谢。

  现按照上图测试电路,

1:现象:(不接4.2V锂电池),指示灯常量,供电电流小于0.01A(数字电源供电5V);插入锂电池,指示灯常量,供电电流小于0.01A(数字电源供电5V);

(不接4.2V锂电池)测试管脚:  VREF 3.3V    ACDRV 11.2V   ,充电电压0.02V;

2.把M1(mos管)直接短路,(不接4.2V锂电池,指示灯闪烁),供电电流0.01A,插入锂电池,指示灯常量,供电电流0.9A(数字电源供电5V);

(不接4.2V锂电池)测试管脚:  VREF 3.3V    ACDRV 11.2V   ,测试充电电压4.18V