bq2946xx Overvoltage Protection Devices Texas Instruments bq2946xx Overvoltage Protection Devices are a secondary-level overvoltage monitor and protector for Li-Ion battery pack systems. The cell is monitored for overvoltage condition and triggers an internal counter once the OVP threshold is exceeded. After a fixed set delay, the out is transitioned to a high level. The output is reset if the cell voltage drops below the set threshold minus the hysteresis. Texas Instruments bq2946xx Overvoltage Protection Device applications include second-level protection in Li-Ion battery packs in tablets, slates, and portable equipment and instrumentation.