BQ27541 Single Cell Li-Ion Battery Fuel Gauge for Battery Pack Integration | TI.com

BQ27541 (NRND)

Single Cell Li-Ion Battery Fuel Gauge for Battery Pack Integration

 

Not Recommended for New Designs (NRND)

Replaced By BQ27542-G1 – The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device.

TI does not recommend using this part in a new design. This product continues to be in production to support existing customers.

Description

The Texas Instruments bq27541 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 for accurate battery fuel gauging. The bq27541 resides within the battery pack or on the system’s main-board with an embedded battery (nonremovable).

The bq27541 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).

The bq27541 also features integrated support for secure battery pack authentication, using the SHA-1/HMAC authentication algorithm.

Features

  • Battery Fuel Gauge for 1-Series Li-Ion Applications
  • Microcontroller Peripheral Provides:
    • Accurate Battery Fuel Gauging
    • Internal Temperature Sensor for System Temperature Reporting
    • SHA-1/HMAC Authentication
    • 96 Bytes of Non-Volatile Scratch Pad FLASH
  • Battery Fuel Gauging Based on Patented Impedance Track™ Technology
    • Models 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 (5 m to 20 m)
  • HDQ and I2C™ Interface Formats for Communication with Host System
  • Small 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 Phillips Corporation.