SLUSCG9A February   2016  – March 2016

PRODUCTION DATA.  

  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  Power-On Reset
    8. 7.8  2.5-V LDO Regulator
    9. 7.9  Internal Clock Oscillators
    10. 7.10 ADC (Temperature and Cell Measurement) Characteristics
    11. 7.11 Integrating ADC (Coulomb Counter) Characteristics
    12. 7.12 Data Flash Memory Characteristics
    13. 7.13 I2C-Compatible Interface Communication Timing Characteristics
    14. 7.14 SDQ Switching Characteristics
    15. 7.15 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Data Commands
        1. 8.3.1.1 Standard Data Commands
          1. 8.3.1.1.1 Control(): 0x00/0x01
      2. 8.3.2 SDQ Signaling
      3. 8.3.3 Reset and Presence Pulse
      4. 8.3.4 WRITE
      5. 8.3.5 READ
      6. 8.3.6 Program Pulse
      7. 8.3.7 IDLE
      8. 8.3.8 CRC Generation
      9. 8.3.9 Communications
        1. 8.3.9.1 I2C Interface
        2. 8.3.9.2 I2C Time Out
        3. 8.3.9.3 I2C Command Waiting Time
        4. 8.3.9.4 I2C Clock Stretching
    4. 8.4 Device Functional Modes
  9. 9 Application 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 BAT Voltage Sense Input
        2. 9.2.2.2 SRP and SRN Current Sense Inputs
        3. 9.2.2.3 Sense Resistor Selection
        4. 9.2.2.4 TS Temperature Sense Input
        5. 9.2.2.5 Thermistor Selection
        6. 9.2.2.6 REGIN Power Supply Input Filtering
        7. 9.2.2.7 VCC LDO Output Filtering
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
    1. 10.1 Power Supply Decoupling
  11. 11Layout
    1. 11.1 Layout Guidelines
      1. 11.1.1 Sense Resistor Connections
      2. 11.1.2 Thermistor Connections
      3. 11.1.3 High-Current and Low-Current Path Separation
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 Community Resources
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

1 Features

  • Battery Fuel Gauge For System-/Pack-Side Configuration
  • Compensated End-of-Discharge Voltage (CEDV) Gauging Technology
    • Adjusts for Battery Aging, Self-Discharge, Temperature, and Rate Changes
    • Reports Remaining Capacity, State-of-Charge (SOC), and Time-to-Empty with Smoothing Filter
    • Battery State-of-Health Estimation
    • Supports Embedded or Removable Packs from 100-mAhr to 14,500-mAhr Capacity
    • Accommodates Pack Swapping with up to Four Separate Battery Profiles
    • Supports a Raw Coulomb Counter To Provide Delta Capacity Information
  • Microcontroller Peripheral Supports:
    • SDQ Communication Interface for
      Authentication ID
    • 400-kHz I2C™ Serial Interface for High-Speed Communication
    • 32 Bytes of Scratch-Pad FLASH NVM
    • Battery Low Digital Output Warning
    • Configurable SOC Interrupts
    • External Thermistor, Internal Sensor, or Host Reported Temperature Options
  • 15-Pin 1.375 mm x 2.75 mm x 1.75 mm Pitch NanoFree™ (DSBGA) Package

2 Applications

  • Smartphones, Feature Phones, and Tablets
  • Wearables
  • Building Automation
  • Portable Medical/Industrial Handsets
  • Portable Audio
  • Gaming

3 Description

The Texas Instruments single-cell bq27320 battery fuel gauge requires very minimal configuration and system microcontroller firmware development, leading to quick system bring-up. The bq27320 uses the Compensated End-of-Discharge Voltage (CEDV) gas gauging algorithm for fuel gauging, and provides information such as remaining battery capacity (mAh), state-of-charge (%), runtime-to-empty (min), battery voltage (mV), temperature (°C) and state-of-health (%).

TI customers can tune chemistry parameters using TI's web-based tool, GAUGEPARCAL.

Configurable interrupts help save system power and free up the host from continuous polling. Accurate temperature sensing is supported via an external thermistor.

Battery fuel gauging with the bq27320 requires only PACK+ (P+), PACK– (P–), and optional thermistor (T) connections to a removable battery pack or embedded battery circuit. The device uses a 15-ball NanoFree™ (DSBGA) package. It is ideal for space-constrained applications.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
bq27320 YZF (15) 1.375 mm x 2.75 mm
x 1.75 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Simplified Schematic

bq27320 bq27320_typ_app.gif

4 Revision History

DATE REVISION NOTES
March 2016 A PRODUCT PREVIEW to Production Data