On Wednesday, December 4, 2013 1:45:02 PM UTC-5, lisarden wrote: > > The abstract from the TPS65217 datasheet to describe what is going on here: > > The linear charger periodically applies a 10-mA current source to the BAT > pin to check for the presence of a > > battery. This will cause the BAT terminal to float up to > 3 V which may > interfere with AC removal detection and > > the ability to switch from AC to USB input. For this reason, it is not > recommended to use both AC and USB > > inputs when the battery is absent. > I wonder when the BAT terminal drifts > 3 V, if the PMIC behaves as if V_BAT > V_UVLO. If so, I wonder what happens if AM335x USB-OTG probing drives VBUS > V_BAT + 190 mV. That would exceed V_IN(DT).
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