1-PWM Brushless DC Motor Control Reference Design
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Key Document


This design is a 3-phase sensored Brushless DC Motor controller that uses a single PWM input for controlling speed and three active-high hall sensors for rotor position detection.  The DRV8305's integrated commutation table simplifies the microcontroller firmware required for proper commutation.  The DRV8305 automatically handles dead time insertion and gate drive current control, both of which can adjusted using the drivers SPI interface.

  • 12 – 24 Volt Operation
  • Control scheme requires only a single PWM Signal and three digital hall states
  • Onboard header and pull-up resistors for direct connection of active-high Hall Sensors
  • SPI communication between MCU and Driver for fast parameter adjustments
  • Onboard JTAG header for in-circuit flashing of microcontroller firmware
  • Small 3 x 2 inch board includes both power and control stage

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Design Files

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TI Devices (3)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD18533Q5A  60-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 5.9 mOhm  MOSFETs  Sample & Buy View Design Kits & Evaluation Modules
DRV8305  45-V max 3-phase smart gate driver with current shunt amplifiers & SPI  Motor drivers  Sample & Buy View Design Kits & Evaluation Modules
MSP430G2553  16 MHz MCU with 16KB Flash, 512B SRAM, comparator, UART/SPI/I2C, timer  Microcontrollers (MCUs)  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CSD18533Q5A VSONP (DQJ)| 8 Download
DRV8305 Download -
MSP430G2553 Download
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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 784 05 Oct 2015
Design files (6)
Title Type Size (KB) Date
ZIP 442 05 Oct 2015
ZIP 840 05 Oct 2015
PDF 1367 05 Oct 2015
PDF 180 05 Oct 2015
PDF 216 05 Oct 2015
PDF 437 05 Oct 2015
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