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BQ78Z100

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Impedance Track™ battery fuel (gas) gauge for 1-series to 2-series

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Data sheet
User guides

BQ78Z100

ACTIVE
Data sheet Order now

Product details

Cell chemistry Li-Ion/Li-Polymer Number of series cells 1-2 Cells Communication interface HDQ, I2C Battery capacity (min) (mAh) 100 Battery capacity (max) (mAh) 32000 Implementation Pack External capacity indication None Features Cell balancing, Impedance Track™ algorithm, Integrated Protector, SHA-1 Authentication Operating temperature range (°C) -40 to 85 Cell balancing External, Internal Rating Catalog
Cell chemistry Li-Ion/Li-Polymer Number of series cells 1-2 Cells Communication interface HDQ, I2C Battery capacity (min) (mAh) 100 Battery capacity (max) (mAh) 32000 Implementation Pack External capacity indication None Features Cell balancing, Impedance Track™ algorithm, Integrated Protector, SHA-1 Authentication Operating temperature range (°C) -40 to 85 Cell balancing External, Internal Rating Catalog
VSON (DRZ) 12 10 mm² 4 x 2.5
  • High-Accuracy Coulomb Counter with Input Offset
    Error < 1 µV (Typical)
  • High-Side FET Drive Allows Serial Bus
    Communication During Fault Conditions
  • Analog Front End with Two Independent ADCs
    • Support for Simultaneous Current and Voltage
      Sampling
  • Bus Communications Interface Options
    • I2C
    • HDQ
  • SHA-1 Hash Message Authentication Code
    (HMAC) Responder for Increased Battery Pack
    Security
    • Split Key (2 × 64) Stored in Secure Memory
  • Programmable Protection Levels for:
    • Overcurrent in Discharge
    • Short-Circuit Current in Charge
    • Short-Circuit Current in Discharge
    • Overvoltage
    • Undervoltage
    • Overtemperature
  • Supports a 1-mΩ to 3-mΩ Current Sense Resistor
  • Compact 12-Terminal SON Package (DRZ)
  • High-Accuracy Coulomb Counter with Input Offset
    Error < 1 µV (Typical)
  • High-Side FET Drive Allows Serial Bus
    Communication During Fault Conditions
  • Analog Front End with Two Independent ADCs
    • Support for Simultaneous Current and Voltage
      Sampling
  • Bus Communications Interface Options
    • I2C
    • HDQ
  • SHA-1 Hash Message Authentication Code
    (HMAC) Responder for Increased Battery Pack
    Security
    • Split Key (2 × 64) Stored in Secure Memory
  • Programmable Protection Levels for:
    • Overcurrent in Discharge
    • Short-Circuit Current in Charge
    • Short-Circuit Current in Discharge
    • Overvoltage
    • Undervoltage
    • Overtemperature
  • Supports a 1-mΩ to 3-mΩ Current Sense Resistor
  • Compact 12-Terminal SON Package (DRZ)

The bq78z100 device provides a fully integrated pack-based solution with a flash programmable custom reduced instruction-set CPU (RISC), safety protection, and authentication for 1-series to 2-series cell Li-Ion and Li-Polymer battery packs.

The bq78z100 gas gauge communicates via an I2C-compatible interface or single-wire HDQ interface and combines an ultra-low-power, high-speed TI bqBMP processor, high-accuracy analog measurement capabilities, integrated flash memory, an array of peripheral and communication ports, an N-channel FET drive, and a SHA-1 Authentication transform responder into a complete, high-performance battery management solution.

The bq78z100 device provides an array of battery and system safety functions, including overcurrent in discharge, short circuit in charge, and short circuit in discharge protection for the battery, as well as FET protection for the N-channel FETs, internal AFE watchdog, and cell balancing. Through firmware, the devices can provide a larger array of features including protection against overvoltage, undervoltage, overtemperature, and more.

The bq78z100 device provides a fully integrated pack-based solution with a flash programmable custom reduced instruction-set CPU (RISC), safety protection, and authentication for 1-series to 2-series cell Li-Ion and Li-Polymer battery packs.

The bq78z100 gas gauge communicates via an I2C-compatible interface or single-wire HDQ interface and combines an ultra-low-power, high-speed TI bqBMP processor, high-accuracy analog measurement capabilities, integrated flash memory, an array of peripheral and communication ports, an N-channel FET drive, and a SHA-1 Authentication transform responder into a complete, high-performance battery management solution.

The bq78z100 device provides an array of battery and system safety functions, including overcurrent in discharge, short circuit in charge, and short circuit in discharge protection for the battery, as well as FET protection for the N-channel FETs, internal AFE watchdog, and cell balancing. Through firmware, the devices can provide a larger array of features including protection against overvoltage, undervoltage, overtemperature, and more.
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Technical documentation

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Type Title Date
* Data sheet bq78z100 Impedance Track Gas Gauge for 1-Series to 2-Series Li-Ion/Li-Polymer Battery Packs datasheet PDF | HTML 14 Sep 2015
* User guide bq78z100 Technical Reference Manual (Rev. A) 15 Sep 2016
Application note How to complete a successful learning cycle for the bq28z610/bq78z100 23 Jun 2016

Design & development

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

Evaluation board

BQ78Z100EVM-532 — bq78z100EVM 1s-2s Li-ion Battery Pack Manager Evaluation Module

The bq78z100EVM-532 evaluation module (EVM) is a complete evaluation system for the bq78z100 or bq294502 battery management system. The EVM includes one bq78z100 and bq294502 circuit module and a link to Windows™ based PC software. The circuit module includes one bq78z100  integrated (...)

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
Download options
Firmware

BQ28Z610-DEVICE-FW — Firmware for BQ28Z610 family of gauges

The BQ28Z610-DEVICE-FW is a firmware (FW) upgrade for the BQ28Z610-R1 and newer devices. The BQ28Z610-R1 is a highly integrated, accurate, 1-series to 2-series cell gas gauge with protection solution, providing autonomous charger control and cell balancing.
Supported products & hardware

Supported products & hardware

Products
Battery fuel gauges
  • BQ28Z610 — Battery fuel gauge with integrated protector for 1-2 series packs
  • BQ28Z610-R1 — Battery fuel gauge with integrated protector for 1-2 series packs
  • BQ78Z100 — Impedance Track™ battery fuel (gas) gauge for 1-series to 2-series
Hardware development
Evaluation board
  • BQ28Z610EVM-532 — BQ28Z610 1-Cell to 2-Cell Programmable Battery Manager Evaluation Module
  • BQ78Z100EVM-532 — bq78z100EVM 1s-2s Li-ion Battery Pack Manager Evaluation Module
Software
Application software & framework
  • BQSTUDIO — Battery Management Studio (bqStudio) Software
  • BQPRODUCTION — Production tool for fourth generation multicell battery fuel (gas) gauges
Download options
Firmware

SLUC601 — BQ78Z100 Firmware version 0.05

Supported products & hardware

Supported products & hardware

Products
Battery fuel gauges
  • BQ78Z100 — Impedance Track™ battery fuel (gas) gauge for 1-series to 2-series
Download
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
View Options
Reference designs

TIDA-00884 — 1 to 2s HDQ Li-Ion Battery Pack Manager Reference Design

The Texas Instruments bq78z100 device is a Battery Pack Manager that integrates gas gauging, and protection for complete autonomous operation of 1-series to 2-series cell Li-Ion and Li-Polymer battery packs. The architecture enables communication between the fuel gauging processor and an external (...)
Design guide: PDF
Schematic: PDF
Package Pins CAD symbols, footprints & 3D models
VSON (DRZ) 12 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

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  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

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