Grįžti į Texas Instruments

Texas Instruments bq27421-G1 System-Side Impedance Track Fuel Gauges

Texas Instruments bq27421-G1 System-Side Impedance Track™ Fuel Gauges are an easy-to-configure microcontroller peripheral that provides system-side fuel gauging for single-cell Li-Ion batteries. These devices require minimal user configuration and system microcontroller firmware development. The bq27421-G1 uses the patented Impedance Track algorithm for fuel gauging and provides information such as remaining battery capacity (mAh), state-of-charge (%), and battery voltage (mV). Battery fuel gauging with the TI bq27421-G1 requires connections only to PACK+ (P+) and PACK- (P-) for a removable battery pack or embedded battery circuit. The tiny 9-pin 1.62mm x 1.58mm x 0.5mm pitch CSP package is ideal for space-constrained applications.

Features

  • Single series cell Li-ion battery fuel gauges
    • Resides on system board
    • Supports embedded or removable batteries
    • Powered directly from battery with integrated LDO
    • Low-value integrated sense resistor (7mΩ typical)
  • Easy-to-configure fuel gauging based on patented Impedance Track technology
    • Reports remaining capacity and state of charge (SOC) with smoothing filter
    • Automatically adjusts for battery aging, self-discharge, temperature, and rate changes
    • Battery state of health (aging) estimation
  • Microcontroller peripheral supports
    • 400kHz I2C™ serial interface
    • Configurable SOC interrupt, or battery-low digital output warning
    • Internal temperature sensor, or host-reported temperature
  • 9-pin 1.62mm × 1.58mm × 0.5mm pitch CSP package

Applications

  • Smartphones and tablets
  • Digital still and video cameras
  • Handheld terminals
  • MP3 or multimedia players

Videos

Development Tool

Paskelbta: 2014-04-10 | Atnaujinta: 2022-03-11