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BATOVP fault means that the voltage sensed at the BAT pin is 4% higher than the expected BATREG voltage. So if this part's BATREG is at +0.5%, V(BAT) sensed is 4.5% higher than that.
The battery overvoltage limit is clamped at 4% above the battery regulation voltage. When battery over voltage occurs, the charger device immediately disables charge. The fault register BAT_FAULT bit goes high and an INT is asserted to the host.
