SLUUD68 December   2024

 

  1.   1
  2.   Abstract
  3. 13
  4. 1General TI High Voltage Evaluation User Safety Guidelines
  5. 2Module Compatibility
    1. 2.1 Supported Wolfspeed Modules and Evaluation Platforms
  6. 3System Overview and Functions
    1. 3.1 Features
    2. 3.2 Specifications
    3. 3.3 PCB Pinout
    4. 3.4 Device Information
      1. 3.4.1 Primary-Side Power
      2. 3.4.2 Primary-Side I/O and Diagnostics
      3. 3.4.3 Secondary-Side Bias Supply
      4. 3.4.4 Output Stage Gate Loop
      5. 3.4.5 Short-Circuit Detection - DESAT
  7. 4Using the EVM
    1. 4.1 Equipment List
    2. 4.2 Test Setups and Procedures
      1. 4.2.1 Power-On and Bias Supply Check
      2. 4.2.2 Output Switching
  8. 5EVM Example Measurements
    1. 5.1 DESAT Functionality Testing
  9. 6EVM Tuning
    1. 6.1 Adjust Power Supplies
      1. 6.1.1 Adjust Only VDD Bias Supply
      2. 6.1.2 Adjust VDD and VEE Bias Supplies Simultaneously
      3. 6.1.3 Switch to Unipolar Bias Supply
      4. 6.1.4 Bypass VDD LDO
    2. 6.2 Adjust Drive Strength
    3. 6.3 Adjust Soft Turn-off Strength
  10. 7Hardware Design Files
    1. 7.1 Schematics
    2. 7.2 PCB Layouts
    3. 7.3 Bill of Materials (BOM)
  11. 8Additional Information
    1. 8.1 Trademarks
  12. 9Revision History

4.2.1 Power-On and Bias Supply Check

Note: This is a low voltage only test; do not attempt to manually probe the test points when a high bus voltage is applied to this EVM.

  1. Power supply set at 12V, 0.5A. Connect power supply to TP44 (power) and TP45 (GND)

  2. Tie J1 to HS COM, and J2 to LS COM. See Figure 4-1 for location of test points.

  3. Probe the VCC-GND voltage between the VCC test via and GND1 TP (lower left of board) with a multimeter. This value should be 5V.

  4. Probe the high side VDD-COM voltage by using the HS VDD test point and the HS COM test point. Probe the low side VDD-COM voltage by using the LS VDD test point and the LS COM test point. These values should be around 20V.

  5. Probe the high side VEE-COM voltage by using the HS VEE test point and the HS COM test point. Probe the low side VEE-COM voltage by using the LS VEE test point and the LS COM test point. These values should be around -5.5V.

  6. Make sure the four red indicator LEDs are off. Make sure the one green indicator LED and the two blue indicator LEDs are on.

    UCC2189X5YQEVM-096 Test Point Locations for Power On CheckFigure 4-1 Test Point Locations for Power On Check