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  • 18-V, 600-W BLDC Motor Inverter Reference Design

    • TIDUF36A May   2023  – December 2023 DRV8328

       

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  • 18-V, 600-W BLDC Motor Inverter Reference Design
  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
    1. 1.1 Key System Specifications
  8. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
    3. 2.3 Highlighted Products
      1. 2.3.1 DRV8328C
      2. 2.3.2 MSPM0G1507
      3. 2.3.3 CSD18510Q5B
      4. 2.3.4 TMP61
  9. 3System Design Theory
    1. 3.1 Power Stage Design: Three-Phase Inverter
      1. 3.1.1 Selecting Sense Resistor
    2. 3.2 Power Stage Design: DRV8328 Gate Driver
      1. 3.2.1 DRV8328 Features
      2. 3.2.2 AVDD Linear Voltage Regulator (LDO)
    3. 3.3 Power Stage Design: MSPM0 Microcontroller
      1. 3.3.1 Low-Side Current Sensing With MSPM0G1507
      2. 3.3.2 Temperature Sensing
    4. 3.4 Power Stage Design: External Interface Options and Indications
      1. 3.4.1 Hall Sensor Interface
      2. 3.4.2 Input Power Voltage Monitoring
      3. 3.4.3 Motor Speed Control
      4. 3.4.4 Direction of Rotation: Digital Input
      5. 3.4.5 Programming Interface for MCU
      6. 3.4.6 Data Transmission
      7. 3.4.7 LED Indicators
      8. 3.4.8 Sleep Mode Entry Control
  10. 4Hardware, Software, Testing Requirements, and Test Results
    1. 4.1 Hardware Requirements
      1. 4.1.1 Hardware Board Overview
    2. 4.2 Software Requirements
    3. 4.3 Test Setup
    4. 4.4 Test Results
      1. 4.4.1 Functional Evaluation of DRV8328 Gate Driver
        1. 4.4.1.1 DRV8328 Linear Regulator Performance
        2. 4.4.1.2 Gate Drive Voltage Generated by Gate Driver
      2. 4.4.2 MOSFET Switching Waveforms
      3. 4.4.3 Current Open Loop Test
      4. 4.4.4 Current Open Loop Load Test
  11. 5Design and Documentation Support
    1. 5.1 Design Files
      1. 5.1.1 Schematics
      2. 5.1.2 BOM
    2. 5.2 Tools and Software
    3. 5.3 Documentation Support
    4. 5.4 Support Resources
    5. 5.5 Trademarks
  12. 6About the Author
  13. 7Revision History
  14. IMPORTANT NOTICE
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Design Guide

18-V, 600-W BLDC Motor Inverter Reference Design

Description

This design guide demonstrates a 600-W power stage for driving a three-phase brushless DC motor in cordless tools operating from a 5-cell Li-ion battery with a voltage up to 21 V. The design is a 60-mm × 60-mm compact drive, bringing 33-ARMS continuous current at 20-kHz switching frequency. A heat sink is not used, only natural convection, and the design uses sensor-based trapezoidal control. The design shows MOSFET operation within the safe operating area using enhanced protections including MOSFET overcurrent and shoot-through protection using VDS monitoring, switching voltage spike optimization with slew rate control and overtemperature protection

Resources

TIDA-010251Design Folder
MSPM0G1507Product Folder
DRV8328Product Folder
CSD18510Q5BProduct Folder
TMP61Product Folder
Ask our TI E2E™ support experts

Features

  • 600-W drive for brushless DC (BLDC) motor supporting sensor-based trapezoidal control
  • Designed to operate from 5 V to 21 V
  • Supports up to 33-ARMS continuous winding current
  • PCB form factor of 60 mm × 60 mm
  • High efficiency at 18 V, 600 W for 20-kHz unipolar trapezoidal control
  • Operating ambient temperature: –20°C to +55°C

Applications

  • Cordless handheld garden tool
  • Cordless power tools
  • Cordless vacuum cleaner
  • Lawn mower

 
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