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Battery Fuel Gauge Family for Smart Phones and Mobile Internet Devices Features Integrated LDOs

Wed, 01/30/2008 - 4:47am

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Battery Fuel Gauge FamilyTexas Instruments introduced two battery fuel gauge devices with integrated low-dropout regulators (LDOs) for smart phones, mobile internet devices and media players with embedded or removable batteries. The system-side and battery pack-side fuel gauges build on the company's line of integrated circuits (ICs) that predict battery life with 99-percent accuracy to extend run-time, protect data and provide a better user experience. The bq27510 system-side battery fuel gauge with Impedance Track technology incorporates an LDO and can be powered directly from the battery cell with less external circuitry, regardless of system voltage. It accurately measures remaining capacity data from a device’s single-cell Li-Ion battery to predict remaining battery capacity under all conditions, even as a battery ages. In addition to the system-side battery fuel gauges, TI’s bq27540 device resides directly on the embedded or removable battery pack to intelligently manage available power that resides in the battery. It will support SDQ, HDQ and I2C communication protocols to allow the system to read important information from the battery. Accurate fuel gauging helps systems intelligently manage available power, alert the user of system operating-time, and extend the run-time of the system as far as possible. Mobile application processors rely on accurate battery data to better optimize the mobile device’s complete power operating system. The bq27510 and bq27540 provide an accurate reserve energy warning, which allows a system to save data to non-volatile memory before the system shuts down, so work is not lost when a battery runs to empty. Suggested retail price is $1.35 each in 1,000-piece quantities.

Texas Instruments
800-477-8924, www.ti.com

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