Home Power management Battery management ICs Battery fuel gauges

BQ27320

ACTIVE

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

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 Operating temperature range (°C) -40 to 85 Rating Catalog
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 Operating temperature range (°C) -40 to 85 Rating Catalog
DSBGA (YZF) 15 4.8125 mm² 1.75 x 2.75
  • 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.

Download View video with transcript Video

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 5
Type Title Date
* Data sheet bq27320 Single-Cell CEDV Fuel Gauge datasheet (Rev. A) PDF | HTML 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
EVM User's 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 (...)

User guide: PDF
Not available on TI.com
Application software & framework

BQSTUDIO-STABLE Battery Management Studio (bqStudio) Software – stable version downloads for bq series of TI battery fuel gauges

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 (...)

lock = Requires export approval (1 minute)
Supported products & hardware

Supported products & hardware

Products
Battery monitors & balancers
BQ76942 3-series to 10-series multicell battery monitor and protector BQ76952 3-s to 16-s high-accuracy battery monitor and protector for Li-ion, Li-polymer and LiFePO4
Battery charger ICs
BQ24800 SMBus 1-4 cell Buck battery charge controller to support hybrid power boost and battery boost mode BQ25720 SMBus 1- to 4-cell NVDC buck-boost battery charge controller with power path and USB-C® PD OTG BQ25723 I²C 1-4 cell NVDC buck-boost battery charge controller with power path and USB-C® PD OTG BQ25731 I2C 1-5 cell NVDC buck-boost battery charge controller with USB type-C PD support BQ25790 Integrated, NVDC, 5-A 1-cell to 4-cell switch-mode buck-boost battery charger BQ25792 I2C controlled, 5-A, 1-4 cell buck-boost charger with dual-input selector and USB PD 3.0 OTG output
Battery fuel gauges
BQ27220 Single cell pack/system-side CEDV battery fuel (gas) gauge w/pre-programmed chemistry profiles BQ27320 Single cell pack/System-side CEDV battery fuel (gas) gauge BQ27425-G1 System-side Impedance Track™; fuel gauge with direct battery connection | gas gauge battery BQ27425-G2A System-side Impedance Track™; fuel gauge for LiCoO2 battery BQ27425-G2B System-side Impedance Track™; fuel gauge LiMn2O4 battery BQ27520-G4 System side Impedance Track™ fuel gauge with integrated LDO. BQ27530-G1 System-side Impedance-Track fuel (gas) gauge with direct battery connection BQ27531-G1 Battery management unit Impedance Track™ fuel (gas) gauge for bq2419x charger controller BQ27532-G1 Battery management unit Impedance Track™ fuel gauge for bq2425x charger BQ27545-G1 Single cell, pack side, Impedance Track™ fuel gauge BQ27546-G1 Single cell Impedance Track™ pack side fuel gauge with DSBGA package BQ27621-G1 System-side fuel gauge with Dynamic Voltage Correlation, battery gas gauge BQ27741-G1 Pack-side Impedance Track™(tm) fuel (gas) gauge with integrated protector BQ27742-G1 Single cell Li-ion battery fuel gauge with integrated protection | battery gas gauge BQ27Z561 Impedance Track™ integrated circuit gas gauge solution for 1-series BQ28Z610 Battery fuel gauge with integrated protector for 1-2 series packs BQ34110 Multi-chemistry high-cell Count battery fuel gauge with integrated rarely discharged module BQ34210-Q1 Automotive Qualified Single cell system-side CEDV fuel gauge BQ34Z100-G1 Multi-chemistry Impedance Track™ standalone fuel gauge | battery gas gauge BQ35100 Battery fuel gauge for non-rechargeable batteries (lithium primary) and end-of-service monitor BQ4050 1-4 series CEDV battery fuel (gas) gauge BQ40Z50 1-4 series Li-ion battery pack manager | battery fuel (gas) gauge BQ40Z50-R1 1-4 series Li-ion battery pack manager supporting Turbo Mode 1.0 BQ40Z50-R2 1-4 series Li-ion battery pack manager supporting Turbo Mode 2.0 BQ40Z60 Complete multi-cell battery manager | battery fuel (gas) gauge BQ40Z80 2-s to 6-s battery pack manager with Impedance Track™ gas gauging BQ78350 Companion CEDV Fuel Gauge Battery Management Controller for bq76940 Monitor Family BQ78350-R1 CEDV li-ion gas gauge and battery management controller BQ78Z100 Impedance Track™ battery fuel (gas) gauge for 1-series to 2-series
Download options
Application software & framework

BQSTUDIO-TEST Battery Management Studio (bqStudio) Software – Beta version downloads

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 (...)

lock = Requires export approval (1 minute)
Supported products & hardware

Supported products & hardware

Products
Battery monitors & balancers
BQ769142 3-s to 14-s high-accuracy battery monitor and protector for Li-ion, Li-polymer and LiFePO4 battery BQ76942 3-series to 10-series multicell battery monitor and protector BQ76952 3-s to 16-s high-accuracy battery monitor and protector for Li-ion, Li-polymer and LiFePO4
Battery charger ICs
BQ24800 SMBus 1-4 cell Buck battery charge controller to support hybrid power boost and battery boost mode BQ25720 SMBus 1- to 4-cell NVDC buck-boost battery charge controller with power path and USB-C® PD OTG BQ25723 I²C 1-4 cell NVDC buck-boost battery charge controller with power path and USB-C® PD OTG BQ25731 I2C 1-5 cell NVDC buck-boost battery charge controller with USB type-C PD support BQ25756 Stand-alone or I²C controlled 70-V bidirectional buck-boost charge controller with MPPT BQ25790 Integrated, NVDC, 5-A 1-cell to 4-cell switch-mode buck-boost battery charger BQ25792 I2C controlled, 5-A, 1-4 cell buck-boost charger with dual-input selector and USB PD 3.0 OTG output
Battery fuel gauges
BQ27220 Single cell pack/system-side CEDV battery fuel (gas) gauge w/pre-programmed chemistry profiles BQ27320 Single cell pack/System-side CEDV battery fuel (gas) gauge BQ27425-G1 System-side Impedance Track™; fuel gauge with direct battery connection | gas gauge battery BQ27425-G2A System-side Impedance Track™; fuel gauge for LiCoO2 battery BQ27425-G2B System-side Impedance Track™; fuel gauge LiMn2O4 battery BQ27427 Single-cell battery fuel gauge with pre-programmed chemistry and integrated sense resistor BQ27510-G3 System-side Impedance-Track fuel gauge that provides 32 bytes of user-programmable data Flash memory BQ27520-G4 System side Impedance Track™ fuel gauge with integrated LDO. BQ27530-G1 System-side Impedance-Track fuel (gas) gauge with direct battery connection BQ27531-G1 Battery management unit Impedance Track™ fuel (gas) gauge for bq2419x charger controller BQ27532-G1 Battery management unit Impedance Track™ fuel gauge for bq2425x charger BQ27541-G1 Pack-side Impedance Track™ battery fuel gauge with integrated LDO BQ27541-V200 Single cell Li-ion battery fuel gauge for battery pack Integration; FW upgrade to BQ27541 BQ27542-G1 Single cell Impedance Track™ pack side fuel gauge with SON package BQ27545-G1 Single cell, pack side, Impedance Track™ fuel gauge BQ27546-G1 Single cell Impedance Track™ pack side fuel gauge with DSBGA package BQ27621-G1 System-side fuel gauge with Dynamic Voltage Correlation, battery gas gauge BQ27741-G1 Pack-side Impedance Track™(tm) fuel (gas) gauge with integrated protector BQ27742-G1 Single cell Li-ion battery fuel gauge with integrated protection | battery gas gauge BQ27Z561 Impedance Track™ integrated circuit gas gauge solution for 1-series BQ27Z746 Pack-side, single-cell Impedance Track™ technology fuel gauge with integrated protector BQ28Z610 Battery fuel gauge with integrated protector for 1-2 series packs BQ34110 Multi-chemistry high-cell Count battery fuel gauge with integrated rarely discharged module BQ34210-Q1 Automotive Qualified Single cell system-side CEDV fuel gauge BQ34Z100-G1 Multi-chemistry Impedance Track™ standalone fuel gauge | battery gas gauge BQ35100 Battery fuel gauge for non-rechargeable batteries (lithium primary) and end-of-service monitor BQ4050 1-4 series CEDV battery fuel (gas) gauge BQ40Z50 1-4 series Li-ion battery pack manager | battery fuel (gas) gauge BQ40Z50-R1 1-4 series Li-ion battery pack manager supporting Turbo Mode 1.0 BQ40Z50-R2 1-4 series Li-ion battery pack manager supporting Turbo Mode 2.0 BQ40Z60 Complete multi-cell battery manager | battery fuel (gas) gauge BQ40Z80 2-s to 6-s battery pack manager with Impedance Track™ gas gauging BQ78350 Companion CEDV Fuel Gauge Battery Management Controller for bq76940 Monitor Family BQ78350-R1 CEDV li-ion gas gauge and battery management controller BQ78Z100 Impedance Track™ battery fuel (gas) gauge for 1-series to 2-series
Hardware development
MKST-3P-ALT-EV2300 MKS Technology alternative for EV2300 communications transceiver
Download options
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 (...)
Software programming tool

BQ-PRODUCTION-SINGLE-CELL-SW 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's battery battery management products. This includes features that allow writing a golden image followed by different (...)

lock = Requires export approval (1 minute)
Supported products & hardware

Supported products & hardware

Products
Battery fuel gauges
BQ27320 Single cell pack/System-side CEDV battery fuel (gas) gauge BQ27Z561 Impedance Track™ integrated circuit gas gauge solution for 1-series BQ27Z561-R1 Impedance Track™ battery gas gauge solution for 1-series cell Li-ion battery packs BQ27Z561-R2 Impedance track battery gas gauge solution for 1-series cell li-ion battery packs
Hardware development
Evaluation board
BQ27320EVM-766 bq27320 System-Side Fuel Gauge with Integrated LDO Evaluation Module BQ27Z561EVM-011 BQ27Z561 1S-cell programmable battery manager Evaluation module
Software
Application software & framework
BQSTUDIO Battery Management Studio (bqStudio) Software BQ27Z561-R2-DEVICE-FW BQ27Z561 firmware: impedance track battery gas gauge solution for 1-s cell li-ion battery
Download options
Calculation tool

GAUGEPARCAL — Gauging Parameter Calculator

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 (...)
User guide: PDF
Package Pins Download
DSBGA (YZF) 15 View options

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos