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Power chipsets boast fast-charging, longer battery life

Posted: 10 Jun 2013     Print Version  Bookmark and Share

Keywords:power management  Li-ion  MaxLife  bq27530  bq27531 

Texas Instruments Inc. (TI) has announced two new additions to its power management chipset portfolio. The chipsets, based on TI's patented MaxLife fast-charge technology, claims to charge single-cell lithium-ion (Li-ion) batteries faster thus providing longer battery life.

The bq27530 and bq27531 fuel gauge circuits, coupled with TI's bq2416x and bq2419x chargers, optimise battery performance using the highest possible charge rates with minimal battery degradation, the company said.

TI says its MaxLife technology leverages an innovative degradation modelling system to minimise charge time while extending battery service life—as much as 30 per cent according to lab tests. Based on TI's Impedance Track battery capacity measurement technology, the MaxLife algorithm accurately predicts and avoids charge conditions that could degrade the battery.

Autonomous battery management
Traditional software-controlled battery management systems—whether implemented with a microcontroller, power management integrated circuit (PMIC) or digital signal processor—are limited in their ability to predict accurate battery capacity and translate that information into run time. The new bq27530 and bq24160 chipset for 2.5A charge rates and the bq27531 and bq24192 chipset for 4.5A charge rates give designers greater flexibility by having the gauge control the charger directly. This autonomous battery management system reduces software overhead, improves battery safety and security, provides better thermal management and allows a designer to adapt the charging algorithm to support different platforms and newer higher capacity batteries.

A new Li-ion fast-charge development kit is available, which features the bq27531 fuel gauge directly communicating with the bq24192 charger via an I2C interface. Input operating range for the evaluation kit is 4.2V to10V.

The bq27530 and bq27531 battery fuel gauges with charger control are available now in a 2 x 1 x 0.65mm, 15-pin wafer chipscale (WCSP) package, and are priced at Rs.111.29 ($2.07) in 1,000-unit quantities. The bq24192 4.5A battery charger comes in a 24-pin, 4 x 4mm QFN package and is priced at Rs.134.41 ($2.50) in quantities of 1,000. The bq24160 dual-input 2.5A charger comes in a 24-pin QFN package and a 2.8 x 2.8mm, 49-ball WCSP package, and is priced at Rs.134.41 ($2.50) in 1,000-unit quantities.

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