SLVT227 October   2025

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Required Equipment
    3. 1.3 Considerations
    4. 1.4 Safety Considerations
    5. 1.5 Dimensions
    6. 1.6 Test Setup
  8. 2Testing and Results
    1. 2.1 Efficiency Graphs
    2. 2.2 Efficiency Data
    3. 2.3 Thermal Images
    4. 2.4 Bode Plots
    5. 2.5 EMI
  9. 3Waveforms
    1. 3.1 Switching
    2. 3.2 Output Voltage Ripple
    3. 3.3 Load Transients
    4. 3.4 Start-up Sequence
    5. 3.5 Shut-down Sequence
  10. 4Static Regulation
  11. 5Transformer Details
    1. 5.1 Material List
    2. 5.2 Winding Details
    3. 5.3 Schematic
    4. 5.4 Winding Instructions
    5. 5.5 Details about Core and Air Gap and Bobbin
    6. 5.6 Bobbin Mechanical Details
  12.   Trademarks

3.1 Switching

Switching behavior is shown in the following figures. C1: Vds of Q1, C4: SW pin of U2.

PMP31375 Switching Waveforms at 180VAC and 4A Load Figure 3-1 Switching Waveforms at 180VAC and 4A Load
PMP31375 Switching Waveforms at 230VAC and 4A Load Figure 3-2 Switching Waveforms at 230VAC and 4A Load
PMP31375 Switching Waveforms at 275VAC and 4A Load Figure 3-3 Switching Waveforms at 275VAC and 4A Load