Texas Instruments Incorporated (TI) (NYSE: TXN) recently introduced two new 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 bq27510 system-side and the bq27540 battery pack-side fuel gauges are sampling today, with volume production expected in the second quarter of 2008. Available in a space-saving 12-pin, 2.5 mm x 4 mm SON package, both devices’ suggested retail price is $1.35 each in 1,000-piece quantities. Evaluation modules of the bq27510 and bq27540, design application notes, user guides and TI’s bqEASY(TM) software design tool are available.
The bq27510 system-side battery fuel gauge with Impedance Track(TM) technology incorporates a LDO and can be powered directly from the battery cell with less external circuitry, regardless of system voltage. In addition to simplifying design of the fuel gauge into the host system, 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.
TI’s new bq27540 device resides directly on the embedded or removable battery pack to intelligently manage available power that resides in the battery. The bq27540 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.
More info: TI bq27500 System-side Battery Fuel Gauge