bq27505-J3 Datasheet | Texas Instruments

FEATURES - 123 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 Battery Temperature Reporting - Battery Low Interrupt Warning - Battery Insertion Indicator - Configurable Level of State of Charge (SOC) Interrupts - State of Health 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) - 400-k Hz I2C™ Interface for Connection to System Microcontroller Port - In a 12-Pin Nano Free™ (CSP) Packaging 1.2 APPLICATIONS - Smartphones - PDAs - Digital Still and Video Cameras - Handheld Terminals - MP3 or Multimedia Players 1.3 DESCRIPTION The Texas Instruments bq27505 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 bq27505 resides on the system’s main board and manages an embedded battery (non-removable) or a removable battery pack. The bq27505 uses the patented Impedance Track™ algorithm for fuel gauging, and provides information such as remaining battery capacity (m Ah), state-ofcharge (%), run-time to empty (min), battery voltage (m V), temperature (°C) and state of health (%). Battery fuel gauging with the bq27505 requires only PACK+ (P+), PACK- (P- ), and Thermistor (T) connections to a removable battery pack or embedded battery circuit. The CSP option is a 12-ball package in the dimensions of 2,43 mm × 1,96 mm with 0,5 mm lead pitch. It is ideal for space constrained applications. TYPICAL...