16S-17S Battery pack reference design with low current consumption


Design files


This reference design is a low standby and low ship mode current consumption 16S-17S LiFePO4 Li-ion battery pack design for telecom battery backup and emotorcycles. It was implemented for a 2-layer PCB. The 9S-15S AFE bq76940 monitors the lower 15 cells voltage and a two-channel general purpose amplifier LM2904B monitors the 16th and 17th battery cells voltage. The design protects the battery pack against overvoltage, undervoltage, overcurrent, and overtemperature, and it reduces energy consumption when in standby and shipping mode through a welldesigned auxiliary power supply strategy and a highly efficient, low quiescent current DC/DC converter LM5164, therefore allows longer shipping time and idle time.

  • Cost competitive 16S-17S LiFePO4 /Li-ion battery pack solution
  • ±5-mV cell voltage sensing accuracy for 16/17S battery cell @ room temperature
  • 100-µA current consumption when in standby mode
  • 5-µA current consumption when in shipping mode
  • Robust and programmable protection, including cell overvoltage and undervoltage, overcurrent discharge, short circuit, overtemperature and undertemperature
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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.

TIDUES4.PDF (2572 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


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


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


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)

LM51646-V to 100-V input, 1-A synchronous buck DC-DC converter with ultra-low IQ

Data sheet: PDF | HTML
Battery monitors & balancers

BQ769409 to 15-series cell li-ion and li-phosphate battery monitor (bq76940 family)

Data sheet: PDF | HTML
Battery protectors

BQ76200High-side n-channel FET driver

Data sheet: PDF | HTML
ESD protection diodes

TPD2E007Dual 10-pF, ±13-V, ±8-kV ESD protection diode for AC Signal Data Interfaces

Data sheet: PDF | HTML
General-purpose op amps

LM2904BDual, 36-V, 1.2-MHz operational amplifier with -40°C to 125°C operation

Data sheet: PDF | HTML
Linear & low-dropout (LDO) regulators

TLV704150-mA 24-V ultra-low-IQ low-dropout (LDO) voltage regulator

Data sheet: PDF | HTML

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

Data sheet: PDF | HTML
MSP430 microcontrollers

MSP430FR215524 MHz MCU with 32KB FRAM, 4KB SRAM, comparator, 12-bit ADC, UART/SPI/I2C, timer

Data sheet: PDF
RS-485 & RS-422 transceivers

THVD15005-V RS-485 transceiver up to 500 kbps with ±8-kV IEC ESD protection

Data sheet: PDF | HTML
Transformer drivers

SN6501Low-noise, 350-mA, 410-kHz transformer driver for isolated power supplies

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Design guide 16S-17S Battery Pack Reference Design With Low Current Consumption Jun. 28, 2019
Technical article Fast and furious: designing longer-lasting 16S-17S Li-ion battery packs for e-moto PDF | HTML Nov. 21, 2019

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