Texas Instruments bq27505 System-Side Impedance Track Fuel Gauge

The bq27505, from Texas Instruments (TI), is a single-cell battery fuel gauge integrated circuit (IC) with Impedance Track technology. Impedance Track technology accurately predicts battery capacity instantly under all operating conditions, including battery age, temperature and discharge behavior. The bq27505 stand-alone lithium battery capacity monitoring and reporting device resides in the system and measures only 2.5 mm x 2 mm x 0.625 mm, and supports portable applications (such as smart phones, digital cameras and MP3 players, where maintaining long battery life is critical for end users). TI’s single-cell battery fuel gauges are available today in volume production.

Texas Instruments (TI) bq27505 System-Side Impedance Track Fuel Gauge

bq27505 Highlights

  • Patented Impedance Track next-generation gauging algorithm
  • Accurate and complete battery fuel gauge
  • CPU-based IC reports remaining capacity, time-to-empty, voltage, current, temperature and more
  • Calculates remaining charge under all conditions
  • System-side implementation even with a removable battery
  • 12-pin, 2.5 x 2 x 0.625 mm WCSP package
  • Provides complete “state-of-health” battery information so a system can effectively manage the battery and extend run-time
  • No calculations needed with the host microcontroller for easy implementation
  • Accurate display of run time under all conditions
  • No extra circuitry needed inside the battery pack
  • Smallest Impedance Track solution in the industry

More info: Texas Instruments bq27505 (pdf)