BQ29441DRBR

The Texas Instruments BQ29441DRBR is a secondary overvoltage protection IC specifically designed for 2-series, 3-series, or 4-series cell Li-Ion battery packs. It incorporates a high-accuracy precision overvoltage detection circuit that compares the voltage of each cell against an internal reference. If an overvoltage condition is detected, the device initiates a timer, providing a delay proportional to the capacitance on the CD pin before signaling an alert.

Key electrical specifications include a typical operating current of 2 µA and a maximum input voltage of 28V. The overvoltage protection threshold is set at 4.4V, with minimum and maximum battery overvoltage protection limits of 4.375V and 4.425V, respectively. The IC offers high-accuracy overvoltage protection of ±25 mV within a temperature range of 0°C to 60°C, with fixed thresholds available at 4.30V, 4.35V, 4.40V, 4.45V, and 4.50V. It also features low power consumption, with Icc typically less than 2 µA when all cells are below the protection voltage.

This device is suitable for second-level protection in various applications, including notebook computers, power tools, and portable equipment and instrumentation. The BQ29441DRBR is available in a compact 8-VSON (3x3 mm) package, designed for surface mounting.