Industrial Battery Management Module for 20S Applications Reference Design


Design files


High serial cell count battery (>15s) systems are becoming more and more common for industrial applications. These applications are cost sensitive and require a simple solution that includes monitoring, protection, and control or even SOC (State of Charge) information rather than only basic independent hardware protection. This design offers a platform for the complete pack side solution. All independent hardware protection features are incorporated from the bq76930 and a robust communication interface is implemented for host device to read the battery information.

  • Supports 16-Series to 20-series cell application
  • All independent hardware protecting function inherited from bq76930
  • Charger insertion detectable
  • Load removal detectable
  • Isolated differentiated CAN PHY for communication with host system
  • Supports up to 128k baud rate UART communication with external host
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDUC43A.PDF (6806 K)

Reference design overview and verified performance test data


Detailed schematic diagram for design layout and components


Complete listing of design components, reference designators, and manufacturers/part numbers


Detailed overview of design layout for component placement

TIDRNC9.ZIP (1724 K)

Files used for 3D models or 2D drawings of IC components


Design file that contains information on physical board layer of design PCB

TIDRNC8.PDF (11521 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

AC/DC & DC/DC converters (integrated FET)

LM250187.5-48V Wide Vin, 300mA Constant On-Time Synchronous Buck Regulator

Data sheet: PDF | HTML
Battery monitors & balancers

BQ769306 to 10-Series Cell Li-Ion and Li-Phosphate Battery Monitor (bq76940 Family)

Data sheet: PDF | HTML
I2C isolators

ISO15412.5-kVrms, isolated unidirectional clock, bidirectional I2C isolator

Data sheet: PDF | HTML
Isolated CAN transceivers

ISO1050Isolated 5-V CAN transceiver

Data sheet: PDF | HTML
MSP430 microcontrollers

MSP430G295516 MHz MCU with 56KB Flash, 2KB SRAM, 10-bit ADC, comparator, UART/SPI/I2C, timer

Data sheet: PDF

Technical documentation

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Type Title Date
* Design guide 20-Series Battery Management Module Reference Design (Rev. A) Oct. 17, 2016
User guide MSP430F2xx, MSP430G2xx Family User's Guide (Rev. K) PDF | HTML Aug. 25, 2022
Application note I2C Communication Sample Code for the bq76940 with CRC Based on the MSP430 (Rev. B) May 14, 2014

Related design resources

Hardware development

BQ76940EVM BQ76940 evaluation board with BQ78350

Reference designs

TIDA-00255 15 Cell Lithium Ion Battery Controller Analog Front End Reference Design TIDA-00449 10s Battery Pack Monitoring, Balancing, and Comprehensive Protection. 50A Discharge Reference Design

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