Tool/software:
Hi experts,
My customer used BQ25618E for a doorbell product and want to use HIZ mode to test battery is good without removing adaptor during manufacturing.
We have verified there would be about -150mA discharging to system in idle mode with only battery condition without adapter by measuring the current via DMM in series with battery.
The issue is when having adaptor, and we could see system is good to bring up and battery also in charging status. Then when we issue HIZ command(REG00, change 81H), we would just see charging current become 0(status is no charging) but what we expect to see is -150mA discharging from battery. It seems system is still powered by adaptor.
The other thing is when we add extra load at system by e-load e.g. 100mA, we could measure battery discharging -100mA now.
Do you have any idea what might goes wrong?
Schematic:
Original register config:
Regards,
Allan