36-V, 1-kW, 99% Efficient, 18-cm2 Power Stage Reference Design for Three-Phase BLDC Motors

(ACTIVE) TIDA-01485

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Key Document

Description

This 1kW power stage reference design achieves 99% efficiency for a three-phase, 36V brushless DC (BLDC) motor used in industrial applications such as power tools that operate from a 10-cell Li-ion battery. The design demonstrates the smallest inverter power stage for this power levels, implementing sensorbased trapezoidal control and supports 25ARMS continuous (60A peak for 2 seconds, 100A peak for 400 milliseconds) winding current. The design’s MOSFET power block and current controlled gate driver helps clean MOSFET switching and lowest EMI due to slew rate control and low parasitic inductance.

Features
  • Operates at voltage ranging from 6V to 42V (10s li-ion battery) delivering 25ARMS continuous (60A peak for 2s, 100A peak for 400ms, 400A for 10ms) motor winding current
  • 36V/700W, 18ARMS support without heat sink in a small 50mm x 36mm PCB form factor
  • MOSFET current monitoring and overcurrent protection by VDS sensing with response time less than 1µs

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Bill of Materials (BOM)

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TI Devices (4)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD88599Q5DC  60 V Half-Bridge NexFET™ Power Block  MOSFETs  Sample & Buy View Design Kits & Evaluation Modules
DRV8323R  60V Three-Phase Smart Gate Driver With Buck Regulator and Three Current Shunt Amplifiers  Motor drivers  Sample & Buy View Design Kits & Evaluation Modules
LMT87-Q1  Automotive Grade, 2.7V-Capable, 10 uA Analog Output Temperature Sensor  Temperature sensors  Sample & Buy View Design Kits & Evaluation Modules
MSP430F5132  25MHz MCU with Two 16-bit High Res Timers, 8KB flash, 1KB RAM, 10-bit ADC, 16-channel Comparator  MSP430 ultra-low-power MCUs  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CSD88599Q5DC VSON-CLIP (DMM)| 22 Download Download
DRV8323R Download Download
LMT87-Q1 Download
MSP430F5132 Download -
Download -
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Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date Views TI Recommends
PDF 6315 30 Aug 2017 115
Design files (6)
Title Abstract Type Size (KB) Date Views
ZIP 1572 30 Aug 2017 15
ZIP 2709 30 Aug 2017 22
PDF 1582 30 Aug 2017 27
PDF 202 30 Aug 2017 13
PDF 102 30 Aug 2017 27
PDF 902 30 Aug 2017 102
Related Tools & Software

Software (1)



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