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Home » NEWEST Products » New by Manufacturer » Texas Instruments » bq27421-G1 System-Side Impedance Track Fuel Gauge - TI
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Texas Instruments bq27421-G1 System-Side Impedance Track™ Fuel Gauge

Texas Instruments bq27421-G1 System-Side
Impedance Track™ Fuel Gauge

Texas Instruments bq27421-G1 System-Side Impedance Track™ Fuel Gauge is an easy to configure microcontroller peripheral that provides system-side fuel gauging for single-cell Li-Ion batteries. The device requires 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 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 × 1.58mm × 0.5mm pitch CSP package is ideal for space constrained applications.

Features
  • Single Series Cell Li-Ion Battery Fuel Gauge
    • 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, Feature phones and Tablets
  • Digital Still and Video Cameras
  • Handheld Terminals
  • MP3 or Multimedia Players
Typical Application
Typical Application
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