10s Battery Pack Monitoring, Balancing, and Comprehensive Protection. 50A Discharge Reference Design


Design files


This reference design is ready tested for 10 cells in series battery pack monitoring, balancing and protection for power tools. Power tools increasingly use highly power-dense Li-Ion or Li-Iron phosphate cells based battery packs that need to be protected from explosion due to incorrect charging or discharging. TIDA-00449 also achieves thermal requirements for power tool battery packs when discharging at high continuous current.

  • Battery pack designed for 36 V (10-cell Li-Ion or  Li-Iron phosphate based), 50-A max continuous discharge current
  • Monitoring of cell voltages, pack current, pack temperatures and protection by controlling charge/discharge FETs and cell balancing
  • Hardware protection for overcurrent in discharge, short circuit in discharge, overvoltage and under voltage
  • Ultra-small footprint, low on-resistance, low Qg and Qgd FemtoFET MOSFETs on board for passive balancing current up to 150-mA per cell
  • Low quiescence current and ultra-low power state for shipment
  • On-board host microcontroller to enable implementation of battery fuel gauging
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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.


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

TIDRHU1.ZIP (3631 K)

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

TIDCB49.ZIP (512 K)

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

TIDRHU0.PDF (3485 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Battery monitors & balancers

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

Data sheet: PDF | HTML
Digital temperature sensors

LMT010.5°C Accurate 2-pin Temperature Sensor with a Pulse Train Interface

Data sheet: PDF | HTML

CSD13381F412-V, N channel NexFET™ power MOSFET, single LGA 1 mm x 0.6mm, 180 mOhm, gate ESD protection

Data sheet: PDF | HTML

CSD19536KTT100-V, N channel NexFET™ power MOSFET, single D2PAK, 2.4 mOhm

Data sheet: PDF | HTML

CSD23381F4-12-V, P channel NexFET™ power MOSFET, single LGA 0.6 mm x 1 mm, 175 mOhm, gate ESD protection

Data sheet: PDF | HTML
MSP430 microcontrollers

MSP430G255316 MHz MCU with 16KB Flash, 512B SRAM, comparator, UART/SPI/I2C, timer

Data sheet: PDF
Supervisor & reset ICs

TPS3839Ultra-low power, supply voltage supervisor

Data sheet: PDF | HTML

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Technical documentation

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Type Title Date
* Design guide 10s battery monitoring, balancing, and comp protection, 50A discharge ref design (Rev. C) Feb. 26, 2019

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