25.2-V, 30-A High-speed sensorless (> 100 krpm) brushless DC motor drive reference design


Design files


This reference design is for high-speed sensorless trapezoidal control of 6 to 33.6-V DC-fed Brushless DC (BLDC) motors up to 900 W and motor speeds of up to 180,000 rpm (verified up to 100,000 rpm). A cost-effective smart microcontroller with a hardware detection of the commutation points accelerates the sensorless trapezoidal control using speed-adaptive Back EMF (BEMF) detection. The BLDC power stage is compact, optimized for efficiency and fully protected against short circuit, motor stall and overtemperature due to the smart three-phase gate driver.

  • High-speed, sensorless trapezoidal control up to 3-kHz motor electrical frequency
  • Speed-adaptive dual-algorithm for BEMF detection
  • Operates at voltage ranging from 6 V to 33.6 V delivering up to 900-W output power, output current up to 30-A RMS
  • Standby current consumption as low as 22 µA
  • Optimized FET switching for best efficiency and EMI
  • Cycle-by-cycle overcurrent, motor stall and short-circuit latch protection by MOSFET VDS monitoring
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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.

TIDUEJ4.PDF (9046 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

TIDCF79.ZIP (448 K)

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.

BLDC drivers

DRV832065-V max 3-phase smart gate driver

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

TPS709150-mA, 30-V, ultra-low-IQ, low-dropout voltage regulator with reverse current protection and enable

Data sheet: PDF | HTML
MSP430 microcontrollers

MSP430FR235524-MHz 105-C integrated analog microcontroller with 32-KB FRAM, Op-Amps/PGAs, 12-bit DACs, 12-bit AD

Data sheet: PDF
N-channel MOSFETs

CSD18514Q5A40-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 4.9 mOhm

Data sheet: PDF | HTML

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Technical documentation

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Type Title Date
* Design guide 25.2-V, 30-A High-speed sensorless (> 100 krpm) brushless DC motor drive Jan. 15, 2019

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