bq27500 Datasheet | Texas Instruments

FEATURES - Battery Fuel Gauge for 1-Series Li-Ion Applications - Resides on System Main Board - Works With Embedded or Removable Battery Packs - Two Varieties - bq27500: Uses PACK+, PACK- , and T Battery Terminals - bq27501: Works With Battery ID Resistor in Battery Pack - Microcontroller Peripheral Provides: - Accurate Battery Fuel Gauging - Internal Temperature Sensor for System Temperature Reporting - Battery Low Interrupt Warning - Battery Insertion Indicator - Battery ID Detection - 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 1.2 APPLICATIONS - Smartphones - PDAs - Digital Still and Video Cameras - Handheld Terminals - MP3 or Multimedia Players 1.3 DESCRIPTION The Texas Instruments bq27500/01 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 bq27500/01 resides on the system main board, and manages an embedded battery (non-removable) or a removable battery pack. The bq27500/01 uses the patented Impedance Track™ algorithm for fuel gauging, and provides information such as remaining battery capacity (m Ah), state-of-charge (%), run-time to empty (min.), battery voltage (m V), 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. The bq27501 works with identification resistors in battery packs to gauge batteries of different fundamental chemistries and/or significantly different rated capacities. TYPICAL...