If the input source applies an overvoltage, the pass FET, if previously on, turns off after a deglitch, t_BLK(OVP). The timer ends and the CHG and PG terminal goes to a high impedance state. Once the overvoltage returns to a normal voltage, the PG terminal goes low, timer continues, charge continues and the CHG terminal goes low after a 25ms deglitch. PG terminal is optional on some packages