BQ41Z50

The BQ41Z50 device, incorporating Dynamic Z-Track™ technology, is a fully integrated, single-chip, pack-based solution that provides a rich array of features for gas gauging, protection, and authentication for 2-series, 3-series, and 4-series cell Li-ion, LiPO, and LiFePO4 battery packs.

Using its integrated high-performance analog peripherals and ultra-low power 32-bit RISC processor, the BQ41Z50 device measures and maintains an accurate record of available cell capacity, voltage, current, temperature, and other critical battery parameters and reports them to the system host controller over an SMBus v3.2 compatible interface.

The BQ41Z50 device utilizes Dynamic Z-Track™ technology to report highly accurate state of charge even under dynamic loading conditions. This technology also improves the accuracy of TURBO mode by providing the available max power and max current to the host system.

The BQ41Z50 device provides an array of battery safety functions including overvoltage, overtemperature, overcurrent in discharge, overcurrent in charge, and short circuit in discharge protections. System safety functions incorporate FET protection for the N-CH FETs and cell disconnection detection. The device firmware provides software-based 1st- and 2nd-level safety protection against overvoltage, undervoltage, overcurrent, short circuit current overtemperature conditions. Pack- and cell-related faults are also handled by firmware-based protections.