SLVUDN4A July   2026  – August 2026

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
    5. 1.5 General Texas Instruments High Voltage Evaluation (TI HV EVM) User Safety Guidelines
  7. 2Hardware
    1. 2.1 Test Setup Requirements
    2. 2.2 Recommended Test Setups
    3. 2.3 Test Points
    4. 2.4 Terminals
  8. 3Performance Data and Typical Characteristic Curves
    1. 3.1  Efficiency Test Data for 28V Output Voltage
    2. 3.2  Efficiency Test Data for 24V Output Voltage
    3. 3.3  Efficiency Test Data for 20V Output Voltage
    4. 3.4  Efficiency Curve: Efficiency vs Output Power
    5. 3.5  Load Regulation
    6. 3.6  Startup Waveforms
    7. 3.7  Switching Frequency Across Load
    8. 3.8  Line Transient Response
    9. 3.9  Load Transient Waveform
    10. 3.10 Output Ripple Voltage
    11. 3.11 EN55022 Class B Conducted EMI Test Result
    12. 3.12 Thermal Performance at Maximum Load
    13. 3.13 PFC Test Results: Vin vs Iin
    14. 3.14 PFC Test Results: Switch node Waveforms across load
    15. 3.15 PFC Test Results: Efficiency (only PFC With External Vcc)
  9. 4Hardware Design Files
    1. 4.1 Schematics
    2. 4.2 PCB Layouts
    3. 4.3 Transformer Details
    4. 4.4 Bill of Materials
  10. 5Additional Informations
    1.     Trademarks
  11. 6Revision History

3.12 Thermal Performance at Maximum Load

The following images show the EVM temperature after 1 hour, 2 hour and 3 hour soak at 90VAC/60Hz, output set to 24V, full load and no forced air.

UCG28828EVM-094 Input = 90VAC/60Hz, Output = 24V/5A and Scan After 1 Hour Run (Bottom Side) Figure 3-75 Input = 90VAC/60Hz, Output = 24V/5A and Scan After 1 Hour Run (Bottom Side)
UCG28828EVM-094 Input = 90VAC/60Hz, Output = 24V/5A and Scan After 2 Hour Run (Bottom Side) Figure 3-76 Input = 90VAC/60Hz, Output = 24V/5A and Scan After 2 Hour Run (Bottom Side)
UCG28828EVM-094 Input = 90VAC/60Hz, Output = 24V/5A and Scan After 3 Hour Run (Bottom Side) Figure 3-77 Input = 90VAC/60Hz, Output = 24V/5A and Scan After 3 Hour Run (Bottom Side)
UCG28828EVM-094 Input = 90VAC/60Hz, Output = 24V/5A and Scan After 3 Hour Run (top Side) Figure 3-78 Input = 90VAC/60Hz, Output = 24V/5A and Scan After 3 Hour Run (top Side)