Hi TI Teams,
We have one question about the output voltage of the BQ25306, that is, whether the output voltage of the BQ25306 increases when the battery is in the protected state.
The battery that we used is a 7.4V lithium battery pack with a protection plate. When the battery pack is overdischarged, the overdischarge protection function will take effect, that making the output current of the battery is 0. At this time, if we want to activate the battery pack again, we need to add a voltage of no less than 7V to the battery pack, otherwise the output current will be 0A all the time.
We can learned from the datasheet of BQ25306 that the short-circuit detection will output a voltage of about 2V, but the detection voltage cannot rises to a certain value (7V) which result the battery pack cannot be activated. When the adapter is insert in, we detected that the output voltage of BQ25306 to the battery is about 2V, the battery pack cannot be activated and charged. Is there any way to solve this problem?
The schematic is as below:
The Battery Charging Profile on the datasheet.