SLVUDZ3 July   2026

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6. 16
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
      1. 1.3.1 Supported Wolfspeed Modules and Evaluation Platforms
      2. 1.3.2 Supported Gate Drivers
    4. 1.4 Device Information
      1. 1.4.1 Primary-Side Power
      2. 1.4.2 Primary-Side I/O and Diagnostics
      3. 1.4.3 Secondary-Side Bias Supply
      4. 1.4.4 Output Stage Gate Loop
      5. 1.4.5 Short-Circuit Detection System
        1. 1.4.5.1 Short-Circuit Detection - DESAT
      6. 1.4.6 PCB Pinout
    5. 1.5 General TI High Voltage Evaluation User Safety Guidelines
  8. 2Using the EVM
    1. 2.1 Equipment List and Board Setup
    2. 2.2 Test Setups and Procedures
      1. 2.2.1 Power-On and Bias Supply Check
      2. 2.2.2 Output Switching
  9. 3Hardware Design Files
    1. 3.1 Schematics
    2. 3.2 PCB Layouts
    3. 3.3 Bill of Materials (BOM)
  10. 4Additional Information
    1. 4.1 Trademarks
  11. 5References

1.4.3 Secondary-Side Bias Supply

The secondary-side power supply block converts the +12V input voltage to +15V/-8V bipolar bias voltage supply for the secondary side of the gate drivers. Each gate driver has its own bias supply. This is achieved by using one UCC34141 Isolated Bias. Adjust the bias supply voltage by changing the FBVDD, FBVEE resistor, and capacitor values. Details will be added in the next revision of the user guide.

UCC2183XXQEVM-123 Secondary-Side Bias SupplyFigure 1-4 Secondary-Side Bias Supply