TI UNVEILS BATTERY MANAGEMENT CHIPS TO MANAGE AND PROTECT MULTI-CELL, LI-ION BATTERY PACKS
Texas Instruments Incorporated has introduced several new battery management integrated circuits (ICs), including its next-generation Impedance TrackTM “gas gauge” chipset, to improve battery performance and protect multi-cell, lithium-based battery packs used in notebooks and other systems.
Impedance Track(TM) Gas Gauge Chipset Taps Unused Energy, Provides Safety and Security Features
TI's bq20z90 next-generation Impedance Track battery gas gauge chipset integrates new state-of-the-art battery authentication technology designed to work with TI's newest analog front end (AFE) protection IC. The gas gauge closely monitors battery capacity, impedance, cell balance, open-circuit voltage and other critical parameters of a 7.2-V, 10.8-V or 14.4-V battery pack and reports the information to the system host controller over a serial-communication bus.
TI's Impedance Track gas gauge technology, launched in 2004 with the bq20z80 chipset, precisely measures changes in impedance, or resistance caused by battery age, temperature and cycle life, to accurately predict run-time of battery packs with two, three and four cells in series. An exact “starting position” is determined for instant state-of-charge, and total capacity is calculated from the amount of capacity that exists, which eliminates the need for a full-charge and discharge cycle.
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