TI BQ27500DRZT-V120

The bq27500 system-side Li-Ion battery fuel gauge is a microcontroller peripheral that provides fuel gauging for single-cell Li-Ion battery packs. The device requires little system microcontroller firmware development. The bq27500 resides on the system main board, and manages an embedded battery (non-removable) or a removable battery pack. The bq27500 uses the patented Impedance Track™ algorithm for fuel gauging, and provides information such as remaining battery capacity (mAh), state-of-charge (%), run-time to empty (min.), battery voltage (mV), and temperature (°C). Battery fuel gauging with the bq27500 requires only PACK+ (P+), PACK– (P-), and Thermistor (T) connections to a removable battery pack or embedded battery.

• Battery Fuel Gauge for 1-Series Li-Ion Applications
• Resides on System Main Board
• Works with Embedded or Removable Battery Packs
• Uses PACK+, PACK–, and T Battery Terminals
• Microcontroller Peripheral Provides:
  • Accurate Battery Fuel Gauging
  • Internal Temperature Sensor for System Temperature Reporting
  • Battery Low Interrupt Warning
  • Battery Insertion Indicator
  • 96 Bytes of Non-Volatile Scratch-Pad FLASH
• Battery Fuel Gauge Based on Patented Impedance Track™ Technology
• Models the Battery Discharge Curve for Accurate Time-to-Empty Predictions
• Automatically Adjusts for Battery Aging, Battery Self-Discharge, and Temperature/Rate Inefficiencies
• Low-Value Sense Resistor (10 mΩ or Less)
• I2C Interface for Connection to System Microcontroller Port
• 12-Pin 2.5-mm×4-mm SON Package

• Smartphones
• PDAs
• Digital Still and Video Cameras
• Handheld Terminals
• MP3 or Multimedia Players