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BQ24610: ACFET无法开启问题

Part Number: BQ24610


5串21V充电电路,适配器电压24V,充电电流2A,预充电电流0.2A,适配器电流3A。问题如下:不插适配器电源,电池供电正常,电池电压17.8V。 插适配器电源,依旧是电池供电17.8V,测量VREF=3.3V ,VCC=23.6V ,Vce = 3.3V ,Vregn = 6V,  STAT1和STAT2电压均约为5V左右。可是ACDRV的电压始终和VCC电压接近,导致ACFET无法开启,搜索了论坛帖子,查看ACFET上拉电阻100K正确。请帮忙指点一下,谢谢!