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Product details

Parameters

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 open-in-new Find other Battery fuel gauges

Package | Pins | Size

TSSOP (DBT) 30 34 mm² 7.8 x 4.4 open-in-new Find other Battery fuel gauges

Features

  • 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

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Description

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

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 7
Type Title Date
* Datasheet BQ78350-R1A CEDV Li-Ion Gas Gauge and Battery Management Controller Companion to the BQ769x0 Battery Monitoring AFE datasheet Dec. 03, 2019
User guides BQ78350-R1A Technical Reference Manual Dec. 09, 2019
User guides bq76930 and bq76940 Evaluation Module (Rev. C) Dec. 10, 2018
User guides bq76920 Evaluation Module User's Guide (Rev. D) Nov. 12, 2018
Application notes Using the bq78350-R1 Nov. 05, 2018
Application notes SMBus Made Simple Nov. 09, 2016
Application notes bq78350 Data Memory Programming for Mass Production Apr. 16, 2015

Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
149
Description

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 (...)

Features
  • Populated circuit board with:
  • Bq7692000 AFE IC
  • Bq78350 Battery Management controller
  • FETs for current control
  • Test point patterns for easy evaluation
EVALUATION BOARDS Download
document-generic User guide
249
Description

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 (...)

Features
  • Bq7693000 AFE IC
  • Bq78350 Battery Management controller
  • FETs for current control
  • Test point patterns for easy evaluation
EVALUATION BOARDS Download
document-generic User guide
249
Description

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 (...)

Features
  • Bq7694000 AFE IC
  • Bq78350 Battery Management controller
  • FETs for current control
  • Test point patterns for easy evaluation

Software development

APPLICATION SOFTWARE & FRAMEWORKS Download
Battery Management Studio (bqStudio) Software
BQSTUDIO 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 (...)
Features
  • Real-time Gauge Dashboard for monitoring basic registers
  • Full register access and logging
  • Full data memory access and logging
  • Product configuration and monitoring tools
  • Import and export of product configurations
  • Calibration and test automation
  • Export of FS files for the target production environment 
APPLICATION SOFTWARE & FRAMEWORKS Download
Gauging Parameter Calculator for CEDV gauges
GPCCEDV 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 Download
BQ78350-R2 Device Firmware: CEDV Li-Ion Gas Gauge and Battery Management Controller
BQ78350-R2-DEVICE-FW — 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.
Features
  • 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 320Ahr
  • Supports charge and (...)
FIRMWARE Download
SLUC594A.ZIP (4249 KB)
SUPPORT SOFTWARE Download
SLUC564FW.ZIP (2777 KB)
SUPPORT SOFTWARE Download
SLUC568.ZIP (148 KB)

Design tools & simulation

CALCULATION TOOLS Download
document-generic User guide

Reference designs

REFERENCE DESIGNS Download
Multi-Cell 36-48V Battery Management System Reference Design
TIDA-00792 — The TIDA-00792 TI 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 subsystem provides battery protection (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
TSSOP (DBT) 30 View options

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