SLUUDA3 May   2025 UCC25661

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specifications
    4. 1.4 Device Information
    5.     General Texas Instruments High Voltage Evaluation (TI HV EVM) User Safety Guidelines
  7. 2Hardware
    1. 2.1 Test Setup
      1. 2.1.1 Test Equipment
      2. 2.1.2 Recommended Test Setup
    2. 2.2 Using the EVM with UCC256612
    3. 2.3 Using the EVM with UCC256613
    4. 2.4 Test Points
    5. 2.5 Terminals
    6. 2.6 Test Procedure
      1. 2.6.1 Equipment Shutdown
  8. 3Implementation Results
    1. 3.1 Performance Data and Typical Characteristic Curves
      1. 3.1.1  UCC25661EVM-128 Standalone Standby and Light Load Power
      2. 3.1.2  Efficiency, Load Regulation, Switching Frequency vs Output Current
      3. 3.1.3  Startup
      4. 3.1.4  Enhanced ZCS Avoidance During Soft Start
      5. 3.1.5  Thermal Image
      6. 3.1.6  Output Voltage Ripple
      7. 3.1.7  Load Transient Response
      8. 3.1.8  Loop Response
      9. 3.1.9  Steady State
      10. 3.1.10 X-Capacitor Discharge
  9. 4Hardware Design Files
    1. 4.1 Schematics
    2. 4.2 PCB Layouts
    3. 4.3 Bill of Materials
  10. 5Additional Information
    1.     Trademarks

1.1 Introduction

The purpose of the EVM is to aid in evaluation of the UCC25661x LLC resonant controller. The EVM is a stand-alone LLC resonant half-bridge DC-DC power converter designed to operate with DC input from 365VDC to 410VDC, AC input from 85 to 265VRMS, 47 to 63Hz, and a nominal output of 12VDC up to 180W. The EVM is delivered using a diode rectifier at the output. The user has the option to evaluate this converter with a synchronous rectifier (SR) by populating the UCC24624 and SR FETs.

This user’s guide describes the UCC25661EVM-128 evaluation module (EVM). The user’s guide provides basic evaluation instructions from a viewpoint of system operation of the stand-alone LLC resonant power converter. Please read this user's guide thoroughly before applying power to this board.