SLUUCW5 November   2023 UCC28750

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specifications
  8. 2Hardware
    1. 2.1 Test Points
    2. 2.2 Test Setup
      1. 2.2.1 Test Setup Requirements
      2. 2.2.2 Test Setup Diagram
    3. 2.3 Best Practices
      1. 2.3.1 General Texas Instruments High Voltage Evaluation (TI HV EVM) User Safety Guidelines
  9. 3Implementation Results
    1. 3.1 Performance Data and Typical Characteristic Curves
      1. 3.1.1 Efficiency
      2. 3.1.2 Startup
      3. 3.1.3 Load Transients
      4. 3.1.4 Output Ripple Voltage at Full Load
      5. 3.1.5 Q1 Drain Voltage Evaluation
  10. 4Hardware Design Files
    1. 4.1 Schematic
    2. 4.2 EVM Assembly and Layout
    3. 4.3 Bill of Materials
  11. 5Additional Information
    1. 5.1 Trademarks

Description

The UCC28750EVM-071 is a 60-W evaluation module (EVM) for evaluating an off-line power AC to DC flyback converter. The UCC28750EVM-071 is intended for evaluation purposes and is not intended to be an end product. The UCC28750EVM-071 converters 85-VRMS to 265-VRMS input voltage down to 24-VDC, capable of delivering 60 W of output power. This evaluation module uses the UCC287502 Constant-Voltage Flyback Controller Using Opto-Coupled Feed-Back in a 60 W converter to provide 2.5 A of constant charge current. The input accepts a voltge range of 85 VAC to 265 VAC. Depending upon the operating conditions, the control law algorithm modulates the switching frequency or the peak primary current to satisfy the power transfer requirements. The programmable slope compensation enables both CCM and DCM operation. Power-boost mode provides additional power for momentary peak demand.