The BQ25120A doesn't seem happy when there's no battery attached. This isn't a typical use case for a shipping product, but we are using the part in development and often want to power our boards from USB only. One annoyance is that the BQ throws an interrupt every ~40msec without a battery:
It appears to be oscillating between thinking the battery is charged and thinking the battery has crossed into UVLO. We've more or less worked around that in firmware by disabling charge if we can't detect a battery. A negative consequence of this is that without a battery, there's no pull up on #MR, so we can't detect button presses any more.
Does TI have a recommendation for how to configure the part to when no battery is connected?
