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  • bq27411-G1 Single-Cell Li-Ion Battery Fuel Gauge for Battery Pack Integration

    • SLUSBN7D January   2014  – April 2017

      PRODUCTION DATA.  

  • CONTENTS
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  • bq27411-G1 Single-Cell Li-Ion Battery Fuel Gauge for Battery Pack Integration
  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1  Absolute Maximum Ratings
    2. 7.2  ESD Ratings
    3. 7.3  Recommended Operating Conditions
    4. 7.4  Thermal Information
    5. 7.5  Supply Current
    6. 7.6  Digital Input and Output DC Characteristics
    7. 7.7  LDO Regulator, Wake-Up, and Auto-Shutdown DC Characteristics
    8. 7.8  ADC (Temperature and Cell Measurement) Characteristics
    9. 7.9  Integrating ADC (Coulomb Counter) Characteristics
    10. 7.10 I2C-Compatible Interface Communication Timing Characteristics
    11. 7.11 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
    4. 8.4 Device Functional Modes
    5. 8.5 Programming
      1. 8.5.1 Standard Data Commands
      2. 8.5.2 Control(): 0x00 and 0x01
      3. 8.5.3 Extended Data Commands
      4. 8.5.4 Communications
        1. 8.5.4.1 I2C Interface
        2. 8.5.4.2 I2C Time Out
        3. 8.5.4.3 I2C Command Waiting Time
        4. 8.5.4.4 I2C Clock Stretching
  9. 9 Applications and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 High-Side or Low-Side Sense Resistor
        2. 9.2.2.2 BAT Voltage Sense Input
        3. 9.2.2.3 Sense Resistor Selection
        4. 9.2.2.4 Communication Interface Lines
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendation
    1. 10.1 Power Supply Decoupling
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
      2. 12.1.2 Community Resources
    2. 12.2 Trademarks
    3. 12.3 Electrostatic Discharge Caution
    4. 12.4 Glossary
  13. 13Mechanical, Packaging, and Orderable Information
  14. IMPORTANT NOTICE

Package Options

Mechanical Data (Package|Pins)
  • DRZ|12
    • MPDS289B
Thermal pad, mechanical data (Package|Pins)
Orderable Information
  • slusbn7d_oa
  • slusbn7d_pm
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DATA SHEET

bq27411-G1 Single-Cell Li-Ion Battery Fuel Gauge for Battery Pack Integration

1 Features

  • Single-Cell Li-Ion Battery Fuel Gauge
    • Resides in Battery Pack
    • Low-Value External Sense Resistor
      (10 mΩ Typical)
    • One Time Programmable (OTP) Configuration Non-Volatile Memory (NVM)
    • Powered Directly from Battery with Integrated LDO
    • 400-kHz I2C™ Serial Interface
    • Internal Temperature Sensor or
      Host-reported Temperature
  • 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

2 Applications

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

3 Description

The Texas Instruments bq27411-G1 device is a battery fuel gauging solution for single-cell Li-Ion battery packs. The device requires minimal configuration and uses One Time Programmable (OTP) Non-Volatile Memory (NVM) to avoid an initialization download by the system processor.

The 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).

The small, 12-pin, 2.50 mm × 4.00 mm, Small Outline No-Lead (SON) package is ideal for space-constrained applications.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
bq27411-G1 VSON (12) 2.50 mm x 4.00 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Simplified Schematic

bq27411-G1 typ_app_bq27411.gif

4 Revision History

Changes from C Revision (September 2015) to D Revision

  • Changed Simplified Schematic Go
  • Changed Pin Functions PROG description Go
  • Changed Figure 5 Go
  • Changed Figure 6 Go
  • Changed Power Supply Decoupling Go
  • Changed Layout Guidelines Go
  • Changed Figure 10 Go

5 Device Comparison Table

PART NUMBER BATTERY TYPE CHEM_ID(1) DM_CODE(2) FIRMWARE
VERSION(3)
bq27411DRZR-G1A LiCoO2
(4.2-V maximum charge)		 0x0128 0x80 1.09
(0x0109)
bq27411DRZT-G1A
bq27411DRZR-G1B LiCoO2
(4.3-V maximum charge)		 0x0312 0x90
bq27411DRZT-G1B
bq27411DRZR-G1C LiCoO2
(4.35-V maximum charge)		 0x0354 0xA0
bq27411DRZT-G1C
(1) Refer to the CHEM_ID subcommand to confirm the battery chemistry type.
(2) Refer to the DM_CODE subcommand to confirm the Data Memory code.
(3) Refer to the FW_VERSION subcommand to confirm the firmware version.

6 Pin Configuration and Functions

Pin Functions

NUMBER NAME TYPE(1) DESCRIPTION
1 SDA DIO Slave I2C serial bus for communication with system (Master). Open-drain pins. Use with external 5- to 10-kΩ pullup resistors (typical) for each pin. If the external pullup resistors will be disconnected from these pins during normal operation, recommend using external 1.0-MΩ pulldown resistors to VSS at each pin to avoid floating inputs.
2 SCL DIO
3 VSS PI Ground pin
4 NC — No internal connection. May be left floating or tied to VSS.
5 VDD PO 1.8-V Regulator Output. Decouple with 0.47-μF ceramic capacitor to VSS. This pin is not intended to provide power for other devices in the system.
6 BAT PI, AI LDO regulator input, battery voltage input, and coulomb counter input typically connected to the PACK+ terminal. Connect a capacitor (1 µF) between BAT to VSS. Place the capacitor close to gauge.
7 SRN AI Coulomb counter differential inputs expecting an external 10-mΩ, 1% sense resistor. Connect SRP to BAT (CELLP) and connect SRN to PACKP.
Low-side current sensing can be enabled by connecting SRN to BATN and SRP to PACKN.
Refer to the typical application diagrams in Typical Applications.
8 SRP AI
9 NC — No internal connection. May be left floating or tied to VSS.
10 TEST DI This digital factory TEST pin must be pulled low for proper operation in customer's application. Recommend terminating with a 1.0-MΩ (typical) pulldown resistor to VSS for reduced power consumption.
11 NC — No internal connection. May be left floating or tied to VSS.
12 PROG DO Programming voltage input for the One Time Programmable (OTP) memory to be used during customer factory configuration. To avoid a floating input condition, recommend terminating with a 1.0-MΩ (typical) pulldown resistor to VSS for reduced power consumption.
If the device is in SHUTDOWN mode, toggling PROG causes the gauge exit SHUTDOWN. It is recommended to connect PROG to the SDA line through a 470-KΩ resistor, so that in case of any inadvertent shutdown condition, the gauge can be commanded to come out of SHUTDOWN.
(1) DIO = Digital input-output, AI = Analog input, P = Power connection

 
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