BQ7790521PWR

The BQ7790521PWR from Texas Instruments is a stackable, ultra-low-power battery protector IC suitable for 3 to 5 series Lithium-Ion and Lithium-Phosphate battery packs. It provides a full suite of voltage, current, and temperature protections without requiring a microcontroller.

Key electrical specifications include overvoltage protection ranging from 3 V to 4.575 V and undervoltage protection from 1.2 V to 3 V, with an accuracy of ±10 mV. Current protection covers overcurrent discharge (–10 mV to –85 mV and –20 mV to +170 mV) and short circuit discharge (–40 mV to +340 mV). Temperature protection thresholds are configurable for charge and discharge over/undertemperature conditions.

This device operates in a normal mode with a low current consumption of 6 µA and a shutdown mode drawing only 0.5 µA maximum. It features independent charge (CHG) and discharge (DSG) FET drivers and has a 36-V absolute maximum rating per cell input. The BQ7790521PWR is supplied in a 20-TSSOP surface mount package, measuring 0.173 inches (4.40 mm) in width, and is rated for an operating temperature range of -40°C to 85°C.

Additional features include open cell and open-wire detection, built-in self-test functions for high reliability, and it is functional safety-capable, with documentation available to aid system design.