18V/1kW, 160A Peak, >98% Efficient, High Power Density Brushless Motor Drive Reference Design


Design files


The TIDA-00774 is a 1kW drive for a three-phase brushless DC (BLDC) motor in power tools operating from a 5-cell Li-ion battery with a voltage up to 21 V. The design is a 65mm x 60mm compact drive, implementing sensor-based trapezoidal control. The design takes advantage of TI's MOSFET Power Block technology, which integrates two FETs in half-bridge configuration into a single SON 5x6 package, enabling very high power density. The design uses two Power Blocks in parallel and delivers 50-ARMS continuous (120-A peak for 3 second, 160-A peak for 1 second) winding current. The MOSFET power block with minimum parasitic inductance and the current controlled gate driver with slew rate control helps in effective MOSFET paralleling and reduces switching spikes. The current sensing is done by monitoring MOSFET VDS. The board provides cycle by cycle over current and short circuit protection.

  • Operates at voltage ranging from 6-V to 21-V (5s li-ion battery) delivering 50-ARMS continuous (120A peak for 3s, 160-A peak for 1s) winding current 
  • Inverter drive efficiency > 98.5%
  • Current sensing by monitoring and amplifying the VDS of MOSFET
  • Effective MOSFET paralleling with excellent dynamic current sharing
  • 18V/680W, 33 A RMS support without heat sink
  • Cycle-by-cycle overcurrent and short circuit protection by VDS sensing
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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.

TIDUCL0.PDF (6424 K)

Reference design overview and verified performance test data

TIDRQT8.PDF (1270 K)

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

TIDRQU2.ZIP (3026 K)

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


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

TIDRQU1.PDF (2091 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)

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Data sheet: PDF | HTML
Analog temperature sensors

LMT87±2°C 2.7V to 5.5V analog output temperature sensor with -13.6 mV/°C gain

Data sheet: PDF | HTML
BLDC drivers

DRV832365-V max 3-phase smart gate driver with current shunt amplifiers

Data sheet: PDF

CSD88584Q5DC40-V, N channel synchronous buck NexFET™ power MOSFET, SON 5 mm x 6 mm Dual-Cool™ power block, 50 A

Data sheet: PDF | HTML
MSP430 microcontrollers

MSP430F513225 MHz MCU with 8KB Flash, 1KB SRAM, 10-bit ADC, comparator, DMA, 16-bit High Resolution timer

Data sheet: PDF | HTML

Start development



TIDCDE7 TIDA-00774 Firmware

Technical documentation

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Type Title Date
* Design guide 18V/1kW, 120APEAK, 98.5 % Efficient, Compact Brushless Motor Drive Design Guide PDF | HTML Nov. 09, 2016
Technical article Demand for higher power density drives innovative power tool solution PDF | HTML May 23, 2017

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