Other Parts Discussed in Thread: BQ25892
I have a question about the implementation of the BQ25628. When I use the circuit as stated in the datasheet, it causes short power drops which resets the whole system. This is also not only on moment where high current is demanded but also at times when the current is below average.
If I bypass the IC (so bypassed from vbat to vbat_out) the system works just fine. Normally I would say that there can be noumerous causes, but since this is almost the only thing I changed from the old hardware version, it seems that can only be this circuit. On the old hardware we used the BQ25892, but due to new power consumption requirements, we changed to the BQ25628. I would say that the only BATFET should be enabled and already is by default. The current that the system draws is most of the time around 100mA. Theoratically, it can increase to 2A but this will never happen in real use.
I know there can be more factors then just the circuit (e.g. pcb design software) but I want to rule out a possible mistake in the circuit.
Is there something else we can try to implement or change?
Update:
I think I found the problem. It probably was the watchdog timer, which caused the drops every 40 seconds. I now disabled it the timer and the problem has not occurred since then.
