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BQ78350-R1A

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CEDV li-ion gas gauge and battery management controller

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Data sheet

BQ78350-R1A

ACTIVE
Data sheet Order now

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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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
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 (...)
View Options
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 (...)
View Options
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

Products
Battery fuel gauges
  • 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
Hardware development
Evaluation board
  • BQ76940EVM — BQ76940 evaluation board with BQ78350
  • BQ76920EVM — BQ76920 evaluation board with BQ78350 
  • BQ76930EVM — BQ76930 evaluation board with BQ78350
Software
Application software & framework
  • BQ-HI-PRODUCTION — Production Application Software for Hi-Cell Count Battery Fuel (Gas) Gauges
  • BQSTUDIO — Battery Management Studio (bqStudio) Software
Download options
Firmware

SLUC594 — bq78350-R1 Device Firmware

Supported products & hardware

Supported products & hardware

Products
Battery fuel gauges
  • BQ78350-R1 — CEDV li-ion gas gauge and battery management controller
  • BQ78350-R1A — CEDV li-ion gas gauge and battery management controller
Download
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

Products
Battery fuel gauges
  • BQ20Z40 — SBS Compliant Gas Gauge with Impedance Track Technology for use with BQ29330
  • BQ20Z40-R1 — SBS 1.1 compliant Gas Gauge with Impedance Track™ Technology
  • BQ20Z45 — SBS 1.1 compliant Gas Gauge with Impedance Track Technology and Advanced Charging Algorithm
  • BQ20Z70-V150 — SBS 1.1-compliant gas gauge enabled with Impedance Track™ technology
  • BQ20Z70-V160 — SBS 1.1-compliant gas gauge enabled with Impedance Track™ technology for use with the bq29330
  • BQ20Z80 — SBS 1.1-compliant gas gauge enabled with Impedance Track™; technology for use with the bq29312
  • BQ20Z80-V102 — SBS 1.1-compliant gas gauge enabled w/Impedance Track™ technology
  • BQ20Z80-V110 — SBS 1.1-compliant gas gauge enabled w/Impedance Track™ technology with FW v1.10
  • BQ20Z80A-V110 — SBS 1.1 compliant gas gauge enabled with Impedance Track™; technology for use with the bq29312A
  • BQ27505-J2 — System-side Impedance Track™; fuel gauge with FW v2.15
  • BQ27505-J3 — System-side Impedance Track™; fuel gauge with FW v2.20
  • BQ27505-J4 — System-side Impedance Track™; fuel gauge with FW v2.24
  • BQ27505-J5 — System-side Impedance Track™; fuel gauge with FW v2.29
  • 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
  • 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
  • BQ27Z558 — Single-cell Impedance Track™ technology gas gauge with 1.2V IO support
  • BQ27Z561 — Impedance Track™ integrated circuit gas gauge solution for 1-series
  • BQ27Z561-R1 — Impedance Track™ battery gas gauge solution for 1-series cell Li-ion battery packs
  • BQ27Z561-R2 — Impedance track battery gas gauge solution for 1-series cell li-ion battery packs
  • BQ27Z746 — Pack-side, single-cell Impedance Track™ technology fuel gauge with integrated protector
  • BQ27Z758 — 1-series Impedance Track™ battery fuel gauge and protection with true 0V charging
  • 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
  • BQ28Z620 — Battery fuel gauge with integrated protector for 1-series to 2 series packs with 1.2-V I/O
  • BQ3050 — SBS 1.1-compliant 2-s to 4-s battery gas gauge & protection
  • BQ3055 — 2-series, 3-series, and 4-series Li-ion battery pack manager
  • BQ3060 — SBS 1.1-compliant gas gauge and protector
  • BQ30Z554-R1 — 2 series, 3 series, and 4 series Li-ion battery pack manager
  • 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 — 1-s to 16-s Impedance Track™ fuel gauge | battery gas gauge
  • BQ34Z100-G1 — Multi-chemistry Impedance Track™ standalone fuel gauge | battery gas gauge
  • BQ34Z100-R2 — Multichemistry Impedance Track™ stand-alone fuel gauge
  • BQ34Z110 — Wide range fuel gauge with Impedance Track™; for lead acid batteries | 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
  • 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
Hardware development
Evaluation board
  • ADVANCED-BQMTESTER — Texas Instruments Advanced bqMTester Multi-Station Test and Program Board
  • BQ27510EVM — System-Side Single-Cell Impedance Track™ Technology Evaluation Module  | Battery Fuel Gauge
  • BQ27520EVM — System-Side Impedance Track™ Battery Fuel Gauge Evaluation Module | Gas Gauge
  • BQ27530EVM — BQ27530EVM System-Side Impedance-Track Fuel (Gas) Gauge Direct Battery Connection Evaluation Module
  • BQ27531EVM — Battery Management Unit Impedance Track Fuel (Gas) Gauge Charger Controller Evaluation Module
  • BQ27532EVM-656 — Battery Charging Solution Evaluation Module
  • BQ27542EVM — Li-ion Battery Fuel Gauge Evaluation Module
  • BQ27546EVM-702 — bq27546 Gas Gauge with Impedance Track™ Technology
  • BQ27741EVM — BQ27741EVM Pack-Side Impedance Track Fuel (Gas) Gauge Integrated Protector Evaluation Module
  • BQ27742EVM — bq27742-G1 Single Cell Li-ion Battery Fuel (Gas) Gauge Programmable Evaluation Module
  • BQ27750EVM-837 — BQ27750 1-Cell Programmable Battery Manager Evaluation Module
  • BQ27Z558EVM-084 — BQ27Z558 evaluation module for single-cell Impedance Track™ technology gas gauge
  • BQ27Z561EVM-011 — BQ27Z561 1S-cell programmable battery manager Evaluation module
  • BQ27Z746EVM-047 — BQ27Z746 evaluation module Impedance Track™ technology battery gas gauge with protection solution
  • BQ28Z610EVM-532 — BQ28Z610 1-Cell to 2-Cell Programmable Battery Manager Evaluation Module
  • BQ28Z620EVM-071 — BQ28Z620 evaluation module for one- or two-series cell Li-Ion Impedance Track™ battery fuel gauge
  • BQ3050EVM-001 — bq3050EVM SBS 1.1 Compliant Advanced Gas Gauge EVM
  • BQ34110EVM-796 — bq34110 Multi-Chemistry CEDV Battery Gas Gauge for Rarely Discharged Applications Evaluation Module
  • BQ34210IQ1EVM-826 — bq34210-Q1 Evaluation Module for System Side CEDV Fuel Gauge
  • BQ34Z100EVM — Bq34z100EVM 1s to 16s Impedance Track Fuel Gauge Battery Evaluation Module | Gas Gauge Battery
  • BQ35100EVM-795 — bq35100 Lithium Primary Cell Evaluation Module Using End-of-Service Monitor Gas Gauging
  • BQ4050EVM-561 — 1 Series, 2 Series, 3 Series, and 4 Series Li-Ion Battery Pack Manager Evaluation Module
  • BQ40Z50EVM-561 — BQ40Z50 evaluation board 
  • BQ40Z60EVM-578 — 2 Series, 3 Series, and 4 Series Li-Ion Battery Pack Manager Evaluation Module
  • BQ40Z80EVM-020 — BQ40Z80 2s-7s Battery Gauge Evaluation Module
  • BQMTESTER — BQMTESTER Multi Channel Test and Program Board
  • MKST-3P-ALT-EV2300 — MKS Technology alternative for EV2300 communications transceiver
Software
Application software & framework
  • BQ-HI-PRODUCTION — Production Application Software for Hi-Cell Count Battery Fuel (Gas) Gauges
  • BQ27Z561-R2-DEVICE-FW — BQ27Z561 firmware: impedance track battery gas gauge solution for 1-s cell li-ion battery
  • BQEVSW — BQ evaluation software (BQEVSW) v0.0.92 for BQ30Z554-R1
  • BQPRODUCTION — Production tool for fourth generation multicell battery fuel (gas) gauges
  • BQPRODUCTION-SINGLECELL — Production Software for Single Cell Battery Fuel (Gas) Gauges
  • BQSTUDIO — Battery Management Studio (bqStudio) Software
Support software
Software programming tool
Firmware
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

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
  • BQ34Z100-R2 — Multichemistry Impedance Track™ stand-alone fuel 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 fourth generation multicell battery fuel (gas) gauges
  • BQPRODUCTION-SINGLECELL — Production Software for Single Cell Battery Fuel (Gas) Gauges
Download options
Support software

SLUC568 — bq78350 Family Thermistor Coefficient Calculator

Supported products & hardware

Supported products & hardware

Products
Battery fuel gauges
  • 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
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-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
TI's Standard Terms and Conditions for Evaluation Items apply.

Ordering & quality

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

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