TIDUF86A January   2025  – July 2025

 

  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 System Overview
    3. 2.3 Highlighted Products
      1. 2.3.1 LMG3100
      2. 2.3.2 LMR38010
      3. 2.3.3 TMP61
      4. 2.3.4 TPS7B81
      5. 2.3.5 OPA4323
  9. 3System Design Theory
    1. 3.1 Power Stage Design: Three-Phase Inverter
    2. 3.2 LMG3100 GaN-FET Power Stage
    3. 3.3 Power Management
    4. 3.4 Current-Sensing Circuit
    5. 3.5 Overcurrent Protection Circuit
    6. 3.6 Phase Voltage and DC Input Voltage Sensing
    7. 3.7 Power-Stage PCB Temperature Monitor
    8. 3.8 Interface to Host MCU
  10. 4Hardware, Testing Requirements, and Test Results
    1. 4.1 Hardware Requirements
      1. 4.1.1 TIDA-010276 PCB Overview
      2. 4.1.2 TIDA-010276 Jumper Settings
    2. 4.2 Test Setup
    3. 4.3 Test Results
      1. 4.3.1 Power Management and System Power Up and Power Down
      2. 4.3.2 GaN Inverter Switch Node Voltage
      3. 4.3.3 Switch Node Voltage Transient Response
      4. 4.3.4 Impact of PWM Frequency to DC-Bus Voltage Ripple
      5. 4.3.5 Efficiency Measurements
      6. 4.3.6 Thermal Analysis
  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

4.2 Test Setup

Table 4-2 lists the key test equipment. Descriptions and pictures of the test setup for specific tests are provided in the corresponding test results sections.

Table 4-2 Key Test Equipment
DESCRIPTION PART NUMBER
High-speed oscilloscope Tektronix MSO4104B
Single-ended probes Tektronix P6139B
Power analyzer HIOKI PW6001
Isolated current probe CYBERTEK CP8030H, HIOKI CT6872
Dynamometer MAGTROL DSP6000
Multimeter Fluke 17B+
Thermal camera FOTRIC
Adjustable power supply (10A) ITECH IT6724H
Adjustable power supply (20A) ITECH M3902C
C2000 MCU LaunchPad Development Kit Texas Instruments LAUNCHXL-F2800137
  • Remove the motor connections from the board, and power on the input DC supply. Make sure that a minimum of a 15VDC input is applied and the 3.3V is generated in the board.
  • Program the MCU as detailed
  • Remove the programmer, and switch off the DC input supply
  • Connect the inverter output to the motor winding terminals
  • Disconnect the J1 to disable bypass LDO
  • Connect J2 (1-2 pin) to enable LDO
  • Use a DC power supply with current-limit protection and apply 36VDC to the board
  • Use MCU and debug tools to run the motor