BQ27425-G1 System-Side Impedance Track™ Fuel Gauge With Direct Battery Connection | Gas Gauge Battery | TI.com

BQ27425-G1
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System-Side Impedance Track™ Fuel Gauge With Direct Battery Connection | Gas Gauge Battery

 

Description

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.

Features

  • 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

Parametrics

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Part number Order Number of series cells Cell chemistry Battery capacity (Max) (mAh) Communication interface Battery capacity (Min) (mAh) External capacity indication Implementation Gas gauge algorithm Operating temperature range (C) Package Group Package size: mm2:W x L (PKG)
BQ27425-G1 Order now Single Cell     Li-Ion/Li-Polymer     4000     I2C     100     None     System     IT (High accuracy)     -40 to 85     DSBGA | 15     15DSBGA: 5 mm2: 2.75 x 1.75 (DSBGA | 15)