BQ298000RUGR

The BQ298000RUGR from Texas Instruments is an active high-side protector IC specifically designed for single-cell lithium-ion and lithium-polymer battery applications. It integrates a high-side NFET driver, enabling fast and flash charging capabilities.

Key protection functions include overvoltage, undervoltage, overcurrent during charge and discharge, short-circuit discharge, and overtemperature protection. The device operates with a maximum input voltage of 5.5V and offers precise voltage protection with tolerances of ±10mV for overvoltage and ±20mV for undervoltage. Current protection tolerances are ±1mV for overcurrent in charge/discharge and ±5mV for short-circuit discharge.

This IC is housed in an 8-pin X2QFN package measuring 1.5mm x 1.5mm, making it suitable for space-constrained designs. It features a low operating current of typically 4µA in normal mode and a mere 0.1µA in shutdown mode. The BQ298000RUGR supports a low sense resistor value down to 1mΩ and includes a CTR pin for FET override control, facilitating system reset or shutdown. It also allows for configuration of a second over-temperature protection threshold using an external PTC thermistor.

With an operating temperature range of -40°C to 85°C, the BQ298000RUGR is a robust solution for battery management systems requiring reliable protection.