Product details

Cell chemistry Li-Ion/Li-Polymer, LiFePO4 Number of series cells 2-4 Cells, >4 Cells Communication interface SMBus Battery capacity (min) (mAh) 500 Battery capacity (max) (mAh) 65000 Implementation Pack External capacity indication LED Features Cell balancing, ECC authentication, Impedance Track™ algorithm, Integrated Protector, SHA-1 Authentication, Turbo Mode Operating temperature range (°C) -40 to 85 Cell balancing External, Internal Rating Catalog
Cell chemistry Li-Ion/Li-Polymer, LiFePO4 Number of series cells 2-4 Cells, >4 Cells Communication interface SMBus Battery capacity (min) (mAh) 500 Battery capacity (max) (mAh) 65000 Implementation Pack External capacity indication LED Features Cell balancing, ECC authentication, Impedance Track™ algorithm, Integrated Protector, SHA-1 Authentication, Turbo Mode Operating temperature range (°C) -40 to 85 Cell balancing External, Internal Rating Catalog
VQFN (RSM) 32 16 mm² 4 x 4
  • Fully integrated 2-series to 6-series li-ion or li-polymer cell battery pack manager and protection
  • Next-generation patented Impedance Track Technology accurately measures available charge in li-ion and li-polymer batteries
  • Configurable multifunction pins to support a variety of applications
  • Supports either Elliptic Curve Cryptography (ECC) or SHA-1 authentication
  • High-side N-CH protection FET drive
  • Integrated cell balancing while charging or at rest
  • Supports 29-Ah batteries natively, and larger capacities with scaling
  • Full array of programmable protection features
    • Voltage
    • Current
    • Temperature
    • Charge timeout
    • CHG/DSG FETs
    • AFE
  • Sophisticated charge algorithms
    • JEITA
    • Enhanced charging
    • Adaptive charging
    • Cell balancing
  • Supports TURBO Mode 2.0/Intel Dynamic Battery Power Technology (DBPTv2)
  • Diagnostic Lifetime Data Monitor and Black Box Recorder
  • LED display
  • Supports two-wire SMBus v1.1 interface
  • IATA support
  • Compact package: 32-lead QFN (RSM)
  • Fully integrated 2-series to 6-series li-ion or li-polymer cell battery pack manager and protection
  • Next-generation patented Impedance Track Technology accurately measures available charge in li-ion and li-polymer batteries
  • Configurable multifunction pins to support a variety of applications
  • Supports either Elliptic Curve Cryptography (ECC) or SHA-1 authentication
  • High-side N-CH protection FET drive
  • Integrated cell balancing while charging or at rest
  • Supports 29-Ah batteries natively, and larger capacities with scaling
  • Full array of programmable protection features
    • Voltage
    • Current
    • Temperature
    • Charge timeout
    • CHG/DSG FETs
    • AFE
  • Sophisticated charge algorithms
    • JEITA
    • Enhanced charging
    • Adaptive charging
    • Cell balancing
  • Supports TURBO Mode 2.0/Intel Dynamic Battery Power Technology (DBPTv2)
  • Diagnostic Lifetime Data Monitor and Black Box Recorder
  • LED display
  • Supports two-wire SMBus v1.1 interface
  • IATA support
  • Compact package: 32-lead QFN (RSM)

The BQ40Z80 device, incorporating patented Impedance Track™ technology, is a fully integrated, single-chip, pack-based solution that provides a rich array of features for gas gauging, protection, and authentication for 2-series up to 6-series cell li-ion and li-polymer battery packs.

Using its integrated high-performance analog peripherals, the BQ40Z80 device measures and maintains an accurate record of available capacity, voltage, current, temperature, and other critical parameters in li-ion or li-polymer batteries, and reports this information to the system host controller over an SMBus v1.1 compatible interface.

Elliptic Curve Cryptography (ECC) or SHA-1 authentication with secure memory for authentication keys enables identification of genuine battery packs.

The BQ40Z80 device supports TURBO Mode 2.0/Intel Dynamic Battery Power Technology (DBPTv2) by providing the available max power and max current to the host system. The device has eight multifunction pins that can be configured as thermal inputs, ADC inputs, general purpose input/output (GPIO) pins, a presence pin, LED functions, display button input, or other functions. Status and flag registers are mappable to the GPIOs and used as interrupts to the host processor.

The BQ40Z80 device, incorporating patented Impedance Track™ technology, is a fully integrated, single-chip, pack-based solution that provides a rich array of features for gas gauging, protection, and authentication for 2-series up to 6-series cell li-ion and li-polymer battery packs.

Using its integrated high-performance analog peripherals, the BQ40Z80 device measures and maintains an accurate record of available capacity, voltage, current, temperature, and other critical parameters in li-ion or li-polymer batteries, and reports this information to the system host controller over an SMBus v1.1 compatible interface.

Elliptic Curve Cryptography (ECC) or SHA-1 authentication with secure memory for authentication keys enables identification of genuine battery packs.

The BQ40Z80 device supports TURBO Mode 2.0/Intel Dynamic Battery Power Technology (DBPTv2) by providing the available max power and max current to the host system. The device has eight multifunction pins that can be configured as thermal inputs, ADC inputs, general purpose input/output (GPIO) pins, a presence pin, LED functions, display button input, or other functions. Status and flag registers are mappable to the GPIOs and used as interrupts to the host processor.

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Technical documentation

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Type Title Date
* Data sheet BQ40Z80 2-Series to 6-Series Li-Ion Battery Pack Manager datasheet (Rev. B) PDF | HTML 14 Sep 2020
* User guide BQ40Z80 Technical Reference Manual (Rev. C) PDF | HTML 11 May 2022
Application note How to Charge With Smart Battery Using MCU in Between to Translate SMBus/I2C PDF | HTML 09 Aug 2024
Application note Battery Gauging Algorithm Comparison PDF | HTML 04 Dec 2023
Application note Autonomous Smart Battery Guide PDF | HTML 15 Oct 2021
Technical article Searching for the newest innovations in power? Find them at APEC PDF | HTML 09 Feb 2019
EVM User's guide bq40z80EVM Li-Ion Battery Pack Manager Rev B Board User's Guide 01 Nov 2018
User guide TI Fuel Gauge Authentication Key Packager and Programmer Tools 29 Jun 2018
Application note How to Complete a Successful Learning Cycle for the bq40z80 06 Jun 2018
Application note bq40z80 Manufacture, Production, and Calibration 06 Jun 2018
Application note Simple Guide to Chemical ID Selection Tool (GPC) (Rev. A) 05 Jun 2018
Application note Gauge Communication 12 Jan 2017

Design & development

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

Evaluation board

BQ40Z80EVM-020 — BQ40Z80 2s-7s Battery Gauge Evaluation Module

The bq40z80 EVM includes one bq40z80, two bq771807 secondary protectors, and a link to Microsoft Windows based PC software, which can be used to monitor and predict capacity, perform cell balancing, monitor critical parameters, protect the cells from overcharge, over-discharge, short circuit, and (...)
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 (...)

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 (...)

Supported products & hardware

Supported products & hardware

Products
Battery monitors & balancers
BQ76905 Low-power monitor and protector for 2S to 5S with high accuracy cell voltage measurement BQ76907 Low-power monitor and protector for 2S to 7S with high accuracy cell voltage measurement 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 BQ76972 3s-to-16s high-accuracy battery monitor and protector for Li-ion, Li-poly 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 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 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
Battery protectors
BQ77307 Low-power protector for 2S to 7S with high accuracy cell voltage measurement
Hardware development
Evaluation board
MKST-3P-ALT-EV2300 MKS Technology alternative for EV2300 communications transceiver
Download options
Firmware

SLUC672 BQ40z80 Device Firmware: 2-Series to 6-Series Battery Pack Manager

Supported products & hardware

Supported products & hardware

Products
Battery fuel gauges
BQ40Z80 2-s to 6-s battery pack manager with Impedance Track™ gas gauging
Software programming tool

BQKEYPROGRAMMER — Program Key Software for Battery Fuel Gauges

Several TI Fuel Gauge products support authentication for anti-counterfeit protection of battery packs. The selection of the battery authentication scheme between SHA and ECC is left to the user to decide. bqKeyPackager is provided to package the key, and bqKeyProgrammer is provided to program the (...)
Package Pins CAD symbols, footprints & 3D models
VQFN (RSM) 32 Ultra Librarian

Ordering & quality

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  • 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

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