Over-voltage protector with LDO output

This post is sponsored by Texas Instruments. The Texas Instruments (TI) bq296xyz family offers high accuracy, low-power over-voltage protectors with a 1mA regulated output supply for Li-Ion battery pack applications. Each cell in a 2-series to 4-series cell stack is individually monitored for an over-voltage condition. An internally fixed-delay timer is initiated upon detection of an over-voltage condition on any 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 1mA (max) output current to drive always-on circuits, such as a real-time clock (RTC) oscillator. The bq296xyz family has a self-disable function to turn off the regulated output if any cell voltage falls below a certain threshold, thereby preventing drain on the battery, and provides an external control to enable or disable the regulated output, says the company.