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BQ24715: bq24715 can’t charge

Part Number: BQ24715
Other Parts Discussed in Thread: EV2400

When the adapter is used to charge the battery,vcc_SYS 13.6v,ACDET 2.8V,CELL 3.6V,BAT 11V,but BATDRV is 13.2V

When a battery is used to power the system,BATDRV is 3.2V。

Please tell me, does this chip need to write a register to charge, and if not, what caused batdrv is 13.2V