TIDT368 August   2024

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Required Equipment
    3. 1.3 Considerations
    4. 1.4 Dimensions
    5. 1.5 Test Setup
  6. 2Testing and Results
    1. 2.1 Efficiency Graphs
    2. 2.2 Efficiency Data
    3. 2.3 Output Voltage Regulation Graphs
    4. 2.4 Thermal Images
    5. 2.5 EMI
  7. 3Waveforms
    1. 3.1 Switching
    2. 3.2 Output Voltage Ripple
    3. 3.3 Load Transients
    4. 3.4 Output Voltage Start-Up Sequence
    5. 3.5 Overcurrent Protection (OCP)
    6. 3.6 Short-Circuit Protection (SCP)

Description

This reference design provides 40W isolated 24V and 5V output with flyback topology. The power supply can be powered from 85VAC to 264VAC input. This design uses the UCC28740 valley-switching, flyback controller. A peak efficiency of 84.99% is reached and the device supports a 2400μF capacitive load with a start-up time of less than 611ms. The board is a single-side component placement PCB design which reduces manufacturing costs.