BQ27425-G1

• Battery Fuel Gauge for 1-Series LiCoO₂ battery Applications
• Easy to Configure Battery Fuel Gauging Based on Patented Impedance Track Technology
  • Models Battery Discharge Curve for Accurate State-of-Charge Report
  • Automatically Adjusts for Battery Aging, Battery Self-Discharge, and
    Temperature/Rate Inefficiencies
  • Low-Value Integrated Sense Resistor
    (10 mΩ typical)
• Resides on System Main Board
  • Works with Embedded or Removable Battery Packs
  • Integrated LDO allows devices to be powered directly from battery pack
• Microcontroller Peripheral Provides:
  • Accurate Battery Fuel Gauging
  • Internal Temperature Sensor for Battery Temperature Reporting
  • Configurable Level of State-of-Charge (SOC) Interrupts
• I²C for Connection to System Microcontroller Port
• Small 15-pin 2,69 × 1,75 mm, 0.5 mm pitch CSP package

The Texas Instruments bq27425 system-side LiCoO₂ battery fuel gauge is an easy to configure microcontroller peripheral that provides fuel gauging for single-cell LiCoO₂ battery packs. The device requires minimal user configurations and system microcontroller firmware development for accurate fuel gauging.

The bq27425 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 bq27425 requires only PACK+ (P+), PACK– (P–), for a removable battery pack or embedded battery circuit. The 15-pin 2,69 × 1,75 mm, 0.5 mm pitch CSP package is ideal for space constrained applications.