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BQ27425 Datasheet

Part NameBQ27425 TI
Texas Instruments TI
DescriptionSystem-Side Impedance Track™ Fuel Gauge With Integrated Sense Resistor
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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
  
APPLICATIONS
• Feature Phones
• Smart Phones
• PDAs
• Digital Still and Video Cameras
• Handheld Terminals
• MP3 or Multimedia Players

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