bq27505-J4 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 - 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 and PDAs - Digital Still and Video Cameras - Handheld Terminals - MP3 or Multimedia Players 1.3 DESCRIPTION The Texas Instruments bq27505-J4 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 micro-controller firmware development. The bq27505-J4 resides on the system’s main board and manages an embedded battery (nonremovable) or a removable battery pack. The bq27505-J4 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), temperature (°C) and state of health(%). Battery fuel gauging with the bq27505-J4 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 2.43mm × 1.96mm with 0.5mm lead pitch. It is ideal for space constrained applications. Power Management Controller Host...