54-V, 1.5 kW, >99% Efficient, 70x69 mm2 power stage reference design for 3-phase BLDC drives
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This reference design demonstrates a 1.5-kW power stage for driving a three-phase brushless DC motor in cordless tools operating from a 15-cell Li-ion battery with a voltage up to 63-V. The design is a 70mm x 69mm compact drive, bringing 25-ARMS continuous current at 20-kHz switching frequency without heat sink and with natural convection, implementing sensorbased trapezoidal control. The design achieves optimized MOSFET switching loss and EMI by using a smart gate driver with optimized MOSFET and PCB. The design shows MOSFET operation within the safe operating area using enhanced protections including MOSFET over current and shoot-through protection by VDS monitoring, gate protection, switching voltage spike optimization with slew rate control and over temperature protection.

  • Operates at voltage ranging from 9 V to 63 V (15s li-ion battery) delivering 25 ARMS continuous current, 400-A peak
  • 54 V/1.5 kW, 25 ARMS support without heat sink in a small 70mm x 69mm PCB form factor
  • More than 99% efficiency at 20 kHz trapezoidal control for 54 V/1.5 kW
  • MOSFET over current protection by VDS sensing with response time less than 1-µs with additional 4-µs deglitch time to eliminate false trips
  • Enhanced protection at MOSFET gate including VGS under-voltage, over-voltage, gate to source short circuit and open circuit protections

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Design Files

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TI Devices (6)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD19536KTT  100-V, N channel NexFET™ power MOSFET, single D2PAK, 2.4 mOhm  MOSFETs  Sample & Buy Not Available
DRV8350R  102-V max 3-phase smart gate driver with buck regulator  Motor drivers  Sample & Buy View Design Kits & Evaluation Modules
INA180  26V, 350kHz current sense amplifier  Current sense amplifiers  Sample & Buy View Design Kits & Evaluation Modules
MSP430FR2355  24-MHz 105-C integrated analog microcontroller with 32-KB FRAM, Op-Amps/PGAs, 12-bit DACs, 12-bit AD  Microcontrollers (MCUs)  Sample & Buy View Design Kits & Evaluation Modules
TMP235  ±1.2°C 2.3V to 5.5V analog output temperature sensor with 10 mV/C gain  Temperature sensors  Sample & Buy View Design Kits & Evaluation Modules
TPS709  150-mA, 30-V, ultra-low-IQ, low-dropout voltage regulator with reverse current protection and enable  Power management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CSD19536KTT Download -
DRV8350R Download Download
INA180 Download -
MSP430FR2355 Download Download
Download Download
Download Download
Download Download
TMP235 Download Download
TPS709 Download

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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 8885 31 Jul 2019
Design files (6)
Title Type Size (KB) Date
ZIP 409 13 Jun 2019
ZIP 4526 13 Jun 2019
PDF 1816 13 Jun 2019
PDF 295 13 Jun 2019
PDF 299 13 Jun 2019
PDF 443 13 Jun 2019
More literature (1)
Title Type Size (KB) Date
ZIP 923 13 Jun 2019

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