Product details

Cell chemistry Li-Ion/Li-Polymer, LiFePO4 Number of series cells >4 Cells Communication interface I2C, SMBus Battery capacity (min) (mAh) 100 Battery capacity (max) (mAh) 320000 Implementation Pack External capacity indication LCD, LED, SOC Features CEDV algorithm Operating temperature range (°C) -40 to 85 Cell balancing External, Internal Rating Catalog
Cell chemistry Li-Ion/Li-Polymer, LiFePO4 Number of series cells >4 Cells Communication interface I2C, SMBus Battery capacity (min) (mAh) 100 Battery capacity (max) (mAh) 320000 Implementation Pack External capacity indication LCD, LED, SOC Features CEDV algorithm Operating temperature range (°C) -40 to 85 Cell balancing External, Internal Rating Catalog
TSSOP (DBT) 30 49.92 mm² 7.8 x 6.4
  • Compensated end-of-discharge voltage (CEDV) gauging algorithm
  • Supports SMBus host communication
  • Flexible configuration for 3- to 5-series (BQ76920), 6- to 10-series (BQ76930), and 9- to 15-series (BQ76940) li-ion and LiFePO4 batteries
  • Supports battery configurations up to 320 Ahr
  • Supports charge and discharge current reporting up to 320 A
  • On-chip temperature sensor option
  • External NTC thermistor support from companion AFE
  • Full array of programmable protection features
    • Voltage, current, and temperature
    • System components
  • Lifetime data logging
  • Supports CC-CV charging, including precharge, charge inhibit, and charge suspend
  • Offers an optional resistor programmable SMBus slave address for up to eight different bus addresses
  • Drives up to a 5-segment LED or LCD display for state-of-charge indication
  • Provides SHA-1 authentication
  • Compensated end-of-discharge voltage (CEDV) gauging algorithm
  • Supports SMBus host communication
  • Flexible configuration for 3- to 5-series (BQ76920), 6- to 10-series (BQ76930), and 9- to 15-series (BQ76940) li-ion and LiFePO4 batteries
  • Supports battery configurations up to 320 Ahr
  • Supports charge and discharge current reporting up to 320 A
  • On-chip temperature sensor option
  • External NTC thermistor support from companion AFE
  • Full array of programmable protection features
    • Voltage, current, and temperature
    • System components
  • Lifetime data logging
  • Supports CC-CV charging, including precharge, charge inhibit, and charge suspend
  • Offers an optional resistor programmable SMBus slave address for up to eight different bus addresses
  • Drives up to a 5-segment LED or LCD display for state-of-charge indication
  • Provides SHA-1 authentication

The Texas Instruments BQ78350-R1A li-ion and LiFePO4 Battery Management Controller and companion to the BQ769x0 family of analog front end (AFE) protection devices provides a comprehensive set of Battery Management System (BMS) subsystems, helping to accelerate product development for faster time-to-market.

The BQ78350-R1A controller and the BQ769x0 AFE support 3-series to 15-series cell applications. The BQ78350-R1A device provides an accurate fuel gauge and state-of-health (SoH) monitor, as well as cell balancing and a full range of voltage-, current-, and temperature-based protection features.

The BQ78350-R1A device offers optional LED or LCD display configurations for capacity reporting. It also makes data available over its SMBus 1.1 interface. Battery history and diagnostic data is also kept within the device in non-volatile memory and is available over the same interface.

The Texas Instruments BQ78350-R1A li-ion and LiFePO4 Battery Management Controller and companion to the BQ769x0 family of analog front end (AFE) protection devices provides a comprehensive set of Battery Management System (BMS) subsystems, helping to accelerate product development for faster time-to-market.

The BQ78350-R1A controller and the BQ769x0 AFE support 3-series to 15-series cell applications. The BQ78350-R1A device provides an accurate fuel gauge and state-of-health (SoH) monitor, as well as cell balancing and a full range of voltage-, current-, and temperature-based protection features.

The BQ78350-R1A device offers optional LED or LCD display configurations for capacity reporting. It also makes data available over its SMBus 1.1 interface. Battery history and diagnostic data is also kept within the device in non-volatile memory and is available over the same interface.

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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet BQ78350-R1A CEDV Li-Ion Gas Gauge and Battery Management Controller Companion to the BQ769x0 Battery Monitoring AFE datasheet PDF | HTML 03 Dec 2019
User guide BQ78350-R1A Technical Reference Manual 09 Dec 2019
Application note Using the bq78350-R1 05 Nov 2018
User guide Simple Guide to CEDV Data Collection for Gauging Parameter Calculator (GPC) (Rev. B) 30 Jan 2018
Application note Gauge Communication 12 Jan 2017
Application note SMBus Made Simple PDF | HTML 09 Nov 2016
Application note bq78350 Data Memory Programming for Mass Production 16 Apr 2015

Design & development

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

Evaluation board

BQ76920EVM — BQ76920 evaluation board with BQ78350 

The bq76920EVM is a populated circuit board for evaluation of the bq7692000 analog front-end (AFE) along with the bq78350 Battery Management Controller that serves as part of a complete pack monitoring and protection solution for 3 to 5-series Lithium Ion, Lithium iron phosphate, and more battery (...)

User guide: PDF
Not available on TI.com
Evaluation board

BQ76930EVM — BQ76930 evaluation board with BQ78350

The bq76930EVM is a populated circuit board for evaluation of the bq76930 analog front-end (AFE) along with the bq78350 Battery Management Controller that serves as part of a complete pack monitoring and protection solution for 6 to 10-series Lithium Ion, Lithium iron phosphate, and more battery (...)

User guide: PDF
Not available on TI.com
Evaluation board

BQ76940EVM — BQ76940 evaluation board with BQ78350

The bq76940EVM is a populated circuit board for evaluation of the bq76940 analog front-end (AFE) along with the bq78350 Battery Management Controller that serves as part of a complete pack monitoring and protection solution for 9 to 15-series Lithium Ion, Lithium iron phosphate, and more battery (...)

User guide: PDF
Not available on TI.com
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 (...)
Firmware

BQ78350-DEVICE-FW BQ78350 family of gauges firmware

BQ78350 family of gauges firmware is a firmware-only release that can be flashed onto any existing BQ78350 hardware (such as the BQ78350, BQ78350-R1, BQ78350-R2, … devices). The firmware incorporates the CEDV Li-ion and LiFePO4 battery management controller to create a pack-based solution that (...)

Supported products & hardware

Supported products & hardware

Download options
Firmware

SLUC594 bq78350-R1 Device Firmware

Supported products & hardware

Supported products & hardware

Software programming tool

BQ-BMS-PROGRAMMER-SW Command line programmers for BQ products

BQ-BATTERY-PROGRAMMER-SW software development kit (SDK) is a collection of robust software command line tools that assist with the process of programming, testing, or assembling packs that use TI Battery management products. The executables in this software work with the MKST-3P-ALT-EV2300 MKS (...)

Supported products & hardware

Supported products & hardware

Download options
Software programming tool

BQ-PRODUCTION-HI-CELL-SW Production software for hi-cell count battery fuel (gas) gauges

Hi-cell bqProduction 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 management products. This includes features that allow writing a golden image followed by different types of (...)

Supported products & hardware

Supported products & hardware

Download options
Support software

SLUC568 bq78350 Family Thermistor Coefficient Calculator

Supported products & hardware

Supported products & hardware

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 | HTML
Reference designs

TIDA-00792 — Multi-Cell 36-48V Battery Management System Reference Design

This reference design provides monitoring, balancing, primary protection and gauging for a 12- to 15-cell lithium-ion or lithium-iron phosphate-based batteries. This board is intended to be mounted in an enclosure for industrial systems. The reference design provides battery protection and gauging (...)
Design guide: PDF
Schematic: PDF
Package Pins CAD symbols, footprints & 3D models
TSSOP (DBT) 30 Ultra Librarian

Ordering & quality

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Support & training

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