Fuel Gauge Li-Ion Pack 12-Pin DS-BGA T/R

The Texas Instruments 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 m? or Less)

I²C Interface for Connection to System Microcontroller Port

12-Pin 2,5-mm × 4-mm SON Package

APPLICATIONS

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