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 (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. The bq27501 works with identification resistors in battery packs to gauge batteries of different fundamental chemistries and/or significantly different rated capacities.
● 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 m or Less)
● I2C Interface for Connection to System Microcontroller Port
● 12-Pin 2,5-mm × 4-mm SON Package
● APPLICATIONS
● Smartphones
● PDAs
● Digital Still and Video Cameras
● Handheld Terminals
● MP3 or Multimedia Players
●Impedance Track is a trademark of Texas Instruments.
●I2C is a trademark of Philips Electronics.
