Texas Instruments' bq40z50 device, incorporating patented Impedance 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 1-, 2-, 3-, and 4-series cell Li-ion and Li-Polymer battery packs.

Using its integrated high-performance analog peripherals, the bq40z50 device measures and maintains an accurate record of available capacity, voltage, current, temperature, and other critical parameters in Li-ion or Li-Polymer batteries, and reports this information to the system host controller over an SMBus v1.1 compatible interface.

The bq40z50 device supports TURBO BOOST mode by providing the available maximum power and maximum current to the host system. The device also supports Battery Trip Point (BTP) to send a BTP interrupt signal to the host system at the pre-set state of charge thresholds.

This device provides software-based 1st- and 2nd-level safety protection against overvoltage, undervoltage, overcurrent, short-circuit current, overload, and overtemperature conditions, as well as other pack- and cell-related faults.

SHA-1 authentication, with secure memory for authentication keys, enables identification of genuine battery packs.