Dear all,
I encountered a phenomena were I cycle a battery pack with BQ40Z50 circuit.
after a few cycles the pack will not accept charge after discharge step ends (after 30min rest).
battery is in CUV fault (naturally since discharge was just done), so DSG path is closed, CHG path should be open, but no charge is allowed.
it happens randomly, but I noticed that connecting a host to to the I2C communication (example: connecting the EV2300 to the board, even without actually reading anything yet). meaning that the SMBus comm is pulled up and only then, the CHG path opens up.
naturally, I cannot see the registers when it happens, since trying to read them fixes the problem...
HWD fault is disabled.
thanks for any assistance,
Ran Aloni