SLUUCI9A January   2022  – December 2022 UCC28781


  1.   Abstract
  2.   Trademarks
  3. Introduction
  4. General Texas Instruments High Voltage Evaluation (TI HV EVM) User Safety Guidelines
  5. Description of EVM
  6. Electrical Performance Specifications of EVM
  7. Schematic Diagram of EVM
  8. Operating the EVM from a DC or an AC Source
    1. 6.1 Typical Applications
    2. 6.2 Using the EVM with a DC Voltage Source
    3. 6.3 Using the EVM with an AC Voltage Source
  9. Test Set-ups
    1. 7.1 Test Set-up Requirements
      1. 7.1.1 Test Set-up Requirements for DC Input
      2. 7.1.2 Test Set-up Requirements for AC Input
    2. 7.2 Test Set-up Diagrams
    3. 7.3 Terminals and Test Points
  10. Performance Data and Typical Characteristic Curves
    1. 8.1 Table of Efficiency Measurements with DC Input
    2. 8.2 Table of Efficiency Measurements with AC Input
    3. 8.3 Efficiency Graphs with DC Input Voltage (Typical Results)
    4. 8.4 Switching Frequencies in Various Operating Modes
    5. 8.5 Key Switching Waveforms and Operating Mode Load Current
    6. 8.6 Thermal Images at Full Load (15 V, 4.0 A) with DC and AC Inputs
  11. Transformer Details
  12. 10EVM Assembly and Layout
  13. 11List of Materials
  14. 12Revision History


This user's guide provides direction on how to operate and evaluate the UCC28781EVM-053 for various performance metrics. The UCC28781EVM-053 implements a typical application for a high-voltage, wide-Vin, single output ZVSF power converter operating from 50 V to 500 V DC input to produce a 15-V output rail for up to 4 A of load current. The EVM includes a means to operate from the standard world-wide AC input range of 90 VRMS to 264 VRMS, as well.