Product details

Cell chemistry Li-Ion/Li-Polymer Number of series cells Single Cell Communication interface I2C Battery capacity (Min) (mAh) 100 Battery capacity (Max) (mAh) 29000 Implementation Pack, System External capacity indication None Features Operating temperature range (C) -40 to 85 Cell balancing
Cell chemistry Li-Ion/Li-Polymer Number of series cells Single Cell Communication interface I2C Battery capacity (Min) (mAh) 100 Battery capacity (Max) (mAh) 29000 Implementation Pack, System External capacity indication None Features Operating temperature range (C) -40 to 85 Cell balancing
DSBGA (YZF) 15 5 mm² 2.65 x 1.996
  • 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 × 2.75 mm × 1.75 mm
    Pitch NanoFree™ (DSBGA) Package
  • 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 × 2.75 mm × 1.75 mm
    Pitch NanoFree™ (DSBGA) Package

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.

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.

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Technical documentation

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Type Title Date
* Data sheet bq27320 Single-Cell CEDV Fuel Gauge datasheet (Rev. A) 28 Mar 2016
User guide bq27320 Technical Reference Manual (Rev. A) 15 Mar 2018
Application note Gauge Communication 12 Jan 2017
Application note Enhanced Resolution Gauging for Low Current Applications Using Scaling 26 Oct 2016
User guide bq27320 Evaluation Module User's Guide 02 Mar 2016

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

BQ27320EVM-766 — bq27320 System-Side Fuel Gauge with Integrated LDO Evaluation Module

The Texas Instruments bq27320 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 minimal system microcontroller firmware development. The bq27320 uses the compensated end-of-discharge voltage gas (...)

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Application software & framework

BQPRODUCTION-SINGLECELL — Production Software for Single Cell Battery Fuel (Gas) Gauges

SingleCellbqProduction offers a full suite of robust tools to assist with the process of configuring, calibrating, manufacturing and tracking printed circuit boards utilizing TI Battery Battery management products. This includes features that allow writing a golden image followed by different types (...)
Application software & framework

BQSTUDIO — Battery Management Studio (bqStudio) Software

Battery Management Studio (bqStudio) offers a full suite of robust tools to assist with the process of evaluating, designing with, configuring, testing, or otherwise utilizing TI Battery management products. This includes features that provide full access to registers and data memory including (...)
Application software & framework

GPCCEDV — Gauging Parameter Calculator for CEDV gauges

Gauging Parameter Calculator (GPC) is a math calculation and simulation tool that helps the battery designer to obtain matching Compensated End of Discharge Voltage (CEDV) coefficients for the specific battery profile. The tool allows the user to increase the accuracy of the fuel gauge IC over (...)
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