SLUSB15J September 2012 – May 2021 BQ2947
PRODUCTION DATA
OVERVOLTAGE mode is detected if any of the cell voltage exceeds the overvoltage threshold, VOV for configured OV delay time. The OUT pin is activated after a delay time set by the capacitance in the CD pin. The OUT pin will either pull high internally, if configured as active high, or will be pulled low internally if configured as active low. An external FET is then turned on, shorting the fuse to ground, which allows the battery and/or charger power to blow the fuse. When all of the cell voltages fall below the (VOV–VHYS), the device returns to NORMAL mode.