SLUSBH1C November 2013  – December 2014

PRODUCTION DATA. 

  1. Features
  2. Applications
  3. Description
  4. Simplified Schematic
  5. Revision History
  6. Device Comparison Table
  7. Pin Configuration and Functions
  8. Specifications
    1. 8.1 Absolute Maximum Ratings
    2. 8.2 ESD Ratings
    3. 8.3  Recommended Operating Conditions
    4. 8.4 Thermal Information
    5. 8.5  Supply Current
    6. 8.6  Digital Input and Output DC Characteristics
    7. 8.7  LDO Regulator, Wake-up, and Auto-Shutdown DC Characteristics
    8. 8.8  LDO Regulator, Wake-up, and Auto-shutdown AC Characteristics
    9. 8.9  ADC (Temperature and Cell Measurement) Characteristics
    10. 8.10 Integrating ADC (Coulomb Counter) Characteristics
    11. 8.11 I2C-Compatible Interface Communication Timing Characteristics
    12. 8.12SHUTDOWN and WAKE-UP Timing
    13. 8.13Typical Characteristics
  9. Detailed Description
    1. 9.1Overview
    2. 9.2Functional Block Diagram
    3. 9.3Feature Description
    4. 9.4Device Functional Modes
    5. 9.5Programming
      1. 9.5.1Standard Data Commands
      2. 9.5.2 Control(): 0x00 and 0x01
      3. 9.5.3Extended Data Commands
      4. 9.5.4Communications
        1. 9.5.4.1I2C Interface
        2. 9.5.4.2I2C Time Out
        3. 9.5.4.3I2C Command Waiting Time
        4. 9.5.4.4I2C Clock Stretching
  10. 10Application and Implementation
    1. 10.1Application Information
    2. 10.2Typical Applications
      1. 10.2.1Design Requirements
      2. 10.2.2Detailed Design Procedure
        1. 10.2.2.1BAT Voltage Sense Input
        2. 10.2.2.2Integrated LDO Capacitor
        3. 10.2.2.3Sense Resistor Selection
      3. 10.2.3Application Curves
  11. 11Power Supply Recommendation
    1. 11.1Power Supply Decoupling
  12. 12Layout
    1. 12.1Layout Guidelines
    2. 12.2Layout Example
  13. 13Device and Documentation Support
    1. 13.1Documentation Support
      1. 13.1.1Related Documentation
    2. 13.2Trademarks
    3. 13.3Electrostatic Discharge Caution
    4. 13.4Glossary
  14. 14Mechanical, Packaging, and Orderable Information

1 Features

  • Single Series Cell Li-Ion Battery Fuel Gauge
    • Resides on System Board
    • Supports Embedded or Removable Batteries
    • Powered Directly from Battery with Integrated LDO
    • Supports a Low-Value External Sense Resistor (10 mΩ)
  • Battery Fuel Gauging Based on Patented Impedance Track™ Technology
    • Reports Remaining Capacity and State-of-Charge (SOC) with Smoothing Filter
    • Automatically Adjusts for Battery Aging, Self-discharge, Temperature, and Rate Changes
    • Battery State-of-Health (Aging) Estimation
  • Microcontroller Peripheral Supports:
    • 400-kHz I2C Serial Interface
    • Configurable SOC Interrupt or
      Battery Low Digital Output Warning
    • Internal Temperature Sensor or
      Host-Reported Temperature

2 Applications

  • Smartphones, Feature Phones, and Tablets
  • Digital Still and Video Cameras
  • Handheld Terminals
  • MP3 or Multimedia Players

3 Description

The Texas Instruments bq27441-G1 fuel gauge is a microcontroller peripheral that provides system-side fuel gauging for single-cell Li-Ion batteries. The device requires minimal user configuration and system microcontroller firmware development.

The bq27441-G1 battery fuel gauge uses the patented Impedance Track™ algorithm for fuel gauging, and provides information such as remaining battery capacity (mAh), state-of-charge (%), and battery voltage (mV).

Battery fuel gauging with the bq27441-G1 fuel gauge requires connections only to PACK+ (P+) and PACK– (P–) for a removable battery pack or embedded battery circuit. The tiny, 12-pin, 2.50 mm × 4.00 mm, small outline no-lead (SON) package is ideal for space-constrained applications.

Device Information(1)

PART NUMBERPACKAGEBODY SIZE (NOM)
bq27441-G1VSON (12)2.50 mm × 4.00 mm
(1) For all available packages, see the orderable addendum at the end of the datasheet.

4 Simplified Schematic

typ_app_bq27441.gif