SLUUCK0A September   2023  – June 2026

 

  1.   1
  2.   Description
  3.   Features
  4.   4
  5. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specifications
    4. 1.4 General TI High Voltage Evaluation User Safety Guidelines
  6. 2Hardware
    1. 2.1 Module and Gate Driver Compatibility
      1. 2.1.1 Supported Wolfspeed Modules and Evaluation Platforms
      2. 2.1.2 Supported Gate Drivers
    2. 2.2 System Overview and Functions
      1. 2.2.1 PCB Pinout
      2. 2.2.2 Block Diagram
        1. 2.2.2.1 Primary-Side Power
        2. 2.2.2.2 Primary-Side I/O and Diagnostics
        3. 2.2.2.3 Secondary-Side Bias Supply
        4. 2.2.2.4 Output Stage Gate Loop
        5. 2.2.2.5 Current Booster
        6. 2.2.2.6 Short-Circuit Detection System
          1. 2.2.2.6.1 Short-Circuit Detection - DESAT
          2. 2.2.2.6.2 Short-Circuit Detection - OC
        7. 2.2.2.7 Temperature-Sense System
    3. 2.3 Test Setups and Procedures
      1. 2.3.1 Equipment List
      2. 2.3.2 Power-On and Bias Supply Check
      3. 2.3.3 Output Switching
      4. 2.3.4 AIN-APWM Test
  7. 3Implementation Results
    1. 3.1 EVM Example Measurements
      1. 3.1.1 Short-Circuit Testing
        1. 3.1.1.1 OC Variant: Normal Switching vs Short Circuit Soft Turn-Off
        2. 3.1.1.2 DESAT Variant: Normal Switching vs Short Circuit Soft Turn-Off
      2. 3.1.2 Analog Sensing
    2. 3.2 EVM Tuning
      1. 3.2.1 Adjust Power Supplies
        1. 3.2.1.1 Adjust VDD Bias Supply
        2. 3.2.1.2 Adjust VEE Bias Supply
        3. 3.2.1.3 Switch to Unipolar Bias Supply
        4. 3.2.1.4 Bypass VDD LDO
      2. 3.2.2 Adjust Drive Strength
        1. 3.2.2.1 Without Booster
        2. 3.2.2.2 Enabling/Disabling Booster Stage
      3. 3.2.3 Adaptations for Other ISO5x5x / UCC217xx Variants
        1. 3.2.3.1 Adapting EVM for UCC21732/39
        2. 3.2.3.2 Adapting EVM for UCC21737
        3. 3.2.3.3 Adapting EVM for ISO5451/ISO5851
  8. 4Hardware Design Files
    1. 4.1 Schematics
    2. 4.2 PCB Layouts
    3. 4.3 Bill of Materials (BOM)
  9. 5Additional Information
    1. 5.1 Trademarks
  10. 6Revision History

2.3.2 Power-On and Bias Supply Check

Note: This is a low voltage only test; do not try to manually probe the test points when a high bus voltage is applied to this EVM.
  1. Tie J2 and J5 to low-side and high-side COM respectively to prevent false triggering of DESAT.
  2. Turn on the power supply and adjust the voltage output to 12V. The power supply can connect to either TP4/TP5 on the EVM or to the Wolfspeed differential board.
  3. Probe the VCC-GND voltage between the VCC test via and TP11 with a multimeter. This value must be 5V.
  4. Probe the high side VDD-COM voltage by using the VDD2 test point and the COM4 or COM5 test point. Probe the low side VDD-COM voltage by using the VDD1 test point and the COM1 or COM2 test point. These values must be 15V.
  5. Probe the high side VEE-COM voltage by using the VEE2 test point and the COM4 or COM5 test point. Probe the low side VEE-COM voltage by using the VEE1 test point and the COM1 or COM2 test point. These values must be -3V.
  6. Make sure the 5V green LED, the HS-BIAS blue LED, and the LS-BIAS blue LED are on. The two red RDY LEDs and the two red FLT LEDs must be off.
    UCC217XXQDWEVM-054 Test Point Locations for Power On Check Figure 2-10 Test Point Locations for Power On Check