We're using the nPM1300 in our designs and we noticed that the charge portion does not appear to keep a battery charged when USB is connected for extended periods.
Our arrangement is that we have a feed from the battery going to a circuit which gets pulsed on and off.
If USB is connected for extended periods the PMIC will charge the battery once and stop.
If the battery voltage drops below ~3.0 volts, the PMIC does not automatically trigger a recharge.
Some OTS chargers exhibit the same characteristics.
We can get around this by drawing from VSYS rather than directly from the battery.
I wanted to avoid the high current spikes going through the PMIC.
