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
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
TSSOP (DBT) 30 34 mm² 7.8 x 4.4
  • 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.

Download

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 9
Type Title 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
User guide bq76930 and bq76940 Evaluation Module (Rev. C) 10 Dec 2018
EVM User's guide bq76920 Evaluation Module User's Guide (Rev. D) 12 Nov 2018
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
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

Products
Battery fuel gauges
BQ34Z100 1-s to 16-s Impedance Track™ fuel gauge | battery gas gauge BQ34Z100-G1 Multi-chemistry Impedance Track™ standalone fuel gauge | battery gas gauge BQ78350 Companion CEDV Fuel Gauge Battery Management Controller for bq76940 Monitor Family BQ78350-R1 CEDV li-ion gas gauge and battery management controller BQ78350-R1A CEDV li-ion gas gauge and battery management controller BQ34110 Multi-chemistry high-cell Count battery fuel gauge with integrated rarely discharged module
Hardware development
Evaluation board
BQ34Z100EVM Bq34z100EVM 1s to 16s Impedance Track Fuel Gauge Battery Evaluation Module | Gas Gauge Battery MKST-3P-ALT-EV2300 MKS Technology alternative for EV2300 communications transceiver BQ76920EVM BQ76920 evaluation board with BQ78350  BQ76930EVM BQ76930 evaluation board with BQ78350 BQ34110EVM-796 bq34110 Multi-Chemistry CEDV Battery Gas Gauge for Rarely Discharged Applications Evaluation Module
Software
Application software & framework
BQ-HI-PRODUCTION Production Application Software for Hi-Cell Count Battery Fuel (Gas) Gauges BQSTUDIO Battery Management Studio (bqStudio) Software BQPRODUCTION Production tool for 4th generation multicell battery fuel (gas) gauges BQPRODUCTION-SINGLECELL Production Software for Single Cell Battery Fuel (Gas) Gauges
Download options
Software programming tool

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 (...)
Software programming tool

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-R2-DEVICE-FW — BQ78350-R2 Device Firmware: CEDV Li-Ion Gas Gauge and Battery Management Controller

The bq78350-R2 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.
Firmware

bq78350-R1 Device Firmware (Rev. A)

SLUC594A.ZIP (4249 KB)
lock = Requires export approval (1 minute)
Support software

bq78350 Family Thermistor Coefficient Calculator

SLUC568.ZIP (148 KB)
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
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 Download
TSSOP (DBT) 30 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

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

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