TIDT012 February   2022

 

  1.   Description
  2. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Required Equipment
    3. 1.3 Considerations
    4. 1.4 Dimensions
  3. 2Testing and Results
    1. 2.1 Efficiency Graphs
    2. 2.2 Load Regulation Graphs
    3. 2.3 Efficiency Data
    4. 2.4 Thermal Images
    5. 2.5 EMI
  4. 3Waveforms
    1. 3.1 Switching
    2. 3.2 Output Voltage Ripple
    3. 3.3 Load Transients

Description

This reference design converts a wide 85–480 VAC input to a pair or reinforced, isolated 12-V and 24-V outputs. The 12-V output is capable of 14-W loading and the 24-V output is capable of 2.4-W loading. This reference design uses UCC28730 as a PSR valley-switching flyback design. A Silicon-Carbide low-side FET is used to achieve high efficiencies while operating across a wide input range. A balancing cap on the secondary keeps the two outputs in close regulation regardless of loading conditions.

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