BQ27320

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Single cell pack/System-side CEDV battery fuel (gas) gauge

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Data sheet

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bq27320 Single-Cell CEDV Fuel Gauge datasheet (Rev. A)

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Online data sheet

BQ27320

ACTIVE

Data sheet

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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

—

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DSBGA (YZF)

15

5 mm² 2.65 x 1.996

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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

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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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User guide

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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 (...)

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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 (...)

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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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Firmware