36V/1kW Brushless DC Motor Drive with Stall Current Limit of <1us Response Time Reference Design
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This reference design is a power stage for brushless motors in battery-powered garden and power tools rated up to 1 kW, operating from a 10-cell lithium-ion battery with a voltage range from 36 to 42 V. The design uses 60V, N-channel NexFETsTM featuring a very low drain-to-source resistance (RDS_ON ) of 1.8 mΩ in a SON5x6 SMD package, which results in a very small PCB form factor of 57 × 59 mm. The three-phase gate-driver is used to drive a three-phase MOSFET bridge, which can operate from 6 to 60 V and supports programmable gate current with maximum setting of 2.3-A sink / 1.7-A source. The C2000™ Piccolo™ LaunchPad™ LAUNCHXL-F28027 is used along with this power stage and 120 degree trapezoidal control of BLDC motor with Hall sensors is implemented in software. The cycle by cycle current limit feature in the gate-driver protects the board from excessive current that is caused during motor stalls, by limiting the maximum current allowed in the power stage to a safe level.

  • 1-kW Power Stage with Hall sensor based Trapezoidal Control for Brushless DC Motor implemented on TMS320F28027 MCU.
  • Designed to Operate from 10-Cell Li-Ion Battery Voltage Ranging from 30-V to 42-V
  • Delivers up to 32-ARMS Continuous Motor Current With an Airflow of 400 LFM
  • Small PCB Form Factor of 57mm x 59 mm using CSD18540Q5B 60-V/400-Apeak, 1.8-mΩ RDS_ON, SON5x6 package MOSFETs for Power Stage
  • Uses DRV8303 Three-Phase Gate Driver, Which can Operate from 6 to 60-V Input, Supporting Programmable Gate Current With Maximum Setting of 2.3-A Sink / 1.7-A Source
  • Hardware Cycle-by-Cycle Overcurrent limit  with Configurable Threshold for motor stall protection
  • Provision for Sense Feedback of Individual Phase Voltage, DC Bus Voltage, DC Bus current sense and Low-Side Current sense on Each Phase for Sensorless Control
  • TPS54061 based 3.3-V/0.15-A Step-Down Buck Converter for Powering MCU
  • Designed to Operate at an Ambient Temperature of–20°C to 55°C

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TI Devices (7)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD18540Q5B  60V, N ch NexFET MOSFET™, single SON5x6, 2.2mOhm  MOSFETs  Sample & Buy View Design Kits & Evaluation Modules
DRV8303  65-V max 3-phase gate driver with current shunt amplifiers & SPI   Motor drivers  Sample & Buy View Design Kits & Evaluation Modules
LMT84  1.5V-Capable, 10 uA Analog Output Temperature Sensor in SC70 and TO-92  Temperature sensors  Sample & Buy View Design Kits & Evaluation Modules
OPA2374  Dual 6.5MHz, 585uA, rail-to-rail I/O CMOS operational amplifier  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
TMS320F28027  C2000™ 32-bit MCU with 60 MHz, 64 KB Flash  Microcontrollers (MCU)  Sample & Buy View Design Kits & Evaluation Modules
TPD4S009  4-channel ESD solution for high-speed Differential interface  Circuit protection ICs  Sample & Buy View Design Kits & Evaluation Modules
TPS54061  4.7V to 60V Input, 200mA Synchronous Step-Down Converter with Low IQ  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CSD18540Q5B VSON-CLIP (DNK)| 8 Download Download
DRV8303 Download -
LMT84 Download
Download Download
OPA2374 Download Download
Download -
TMS320F28027 Download -
Download Download
TPD4S009 Download Download
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TPS54061 Download

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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 10446 12 May 2016
Design files (6)
Title Type Size (KB) Date
ZIP 537 17 Mar 2015
ZIP 7004 17 Mar 2015
ZIP 1094 17 Mar 2015
PDF 345 17 Mar 2015
PDF 26 17 Mar 2015
PDF 717 17 Mar 2015
More literature (1)
Title Type Size (KB) Date
ZIP 5142 13 Feb 2017

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