BQ2962 Overvoltage Protection (OVP) for 2-, 3-, and 4-Series Cell Li-Ion

Texas Instruments' BQ2962 is a high-accuracy, low-power overvoltage protector with a 2 mA regulated output supply for Li-Ion battery pack applications.

The cells in a 2-series to 4-series cell-stack are individually monitored for an overvoltage condition. An internally fixed-delay timer is initiated upon detection of an overvoltage condition on a cell. Upon expiration of the delay timer, an output pin is triggered into an active state to indicate that an overvoltage condition has occurred.

The regulated output supply delivers up to 2 mA (max) output current to drive always-on circuits such as a real-time clock (RTC) oscillator. The BQ2962 device has a self-disable function to turn off the regulated output if a cell voltage falls below a certain threshold. This prevents drain on the battery and provides an external control to enable or disable the regulated output.