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The bq2461x monitors the charging current during the voltage regulation phase. When VTTC is valid, termination is detected while the voltage on the VFB pin is higher than the VRECH threshold AND the charge current is less than the ITERM threshold
当然也要注意你的设计没有禁用充电终止判断功能先！
The TTC pin may be taken LOW to disable termination and to disable the safety timer. If TTC is pulled to VREF, the bq2461x continues to allow termination, but disables the safety timer. TTC taken low resets the safety timer. When ACOV, VCCLOWV, and SLEEP mode resume normal, the safety timer is reset.
