New battery fuel gauge and charger chipsets squeeze more life out of Li-Ion batteries
The bq27530 and bq27531 fuel gauge circuits, coupled with TI’s bq2416x and bq2419x chargers, optimize battery performance using the highest possible charge rates with minimal battery degradation.
Mobile phone users are frustrated when their batteries’ charge doesn’t last as long after months of daily charging and discharging. TI’s MaxLife technology applies an innovative degradation modeling system to minimize charge time while extending battery service life – as much as 30 percent 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.
Traditional software-controlled battery management systems – whether implemented with a microcontroller, PMIC (power management integrated circuit) 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 2.5-A charge rates and the bq27531 and bq24192 chipset for 4.5-A charge rates give designers greater flexibility by having the gauge control the charger directly. The 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 4.2 V to 10 V.
Availability and Pricing
The bq27530 and bq27531 battery fuel gauges with charger control are available now in a 2-mm by 1-mm by 0.65-mm, 15-pin wafer chipscale (WCSP) package, and are priced at $2.07 in 1,000-unit quantities. The bq24192 4.5-A battery charger comes in a 24-pin, 4-mm by 4-mm QFN package and is priced at $2.50 in quantities of 1,000. The bq24160 dual-input 2.5-A charger comes in a 24-pin QFN package and a 2.8-mm by 2.8-mm, 49-ball WCSP package, and is priced at $2.50 in 1,000-unit quantities.
More information about the MaxLife fast-charge technology at
www.ti.com/maxlife-pr
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