TIDT408A December   2024  – May 2025

 

  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 Dimensions
    4. 1.4 Test Setup
  6. 2Testing and Results
    1. 2.1 Efficiency Graphs
    2. 2.2 Voltage Regulation
    3. 2.3 No Load Power Consumption
    4. 2.4 Efficiency Data
    5. 2.5 Thermal Images
    6. 2.6 EMI
  7. 3Waveforms
    1. 3.1 Start-Up and Shut Down Waveforms
    2. 3.2 Voltage Transition
    3. 3.3 Switching Waveform
      1. 3.3.1 Voltage Stress at Normal Operation
      2. 3.3.2 Voltage Stress at Start-Up
      3. 3.3.3 VCC Self-Bias Voltage
      4. 3.3.4 X Cap Discharge
    4. 3.4 Ripple and Noise
    5. 3.5 Load Transients
    6. 3.6 Overcurrent Protection
    7. 3.7 Short-Circuit Protection
    8. 3.8 Overvoltage Protection at AC-DC Output

3.3.2 Voltage Stress at Start-Up

Figure 3-30 and Figure 3-31 show the voltage stress on primary side switches at 264VAC and 90VAC, full load start-up.

PMP41117 Start-Up Vds_pri,264VAC, Full Load, Vds Peak 680VFigure 3-30 Start-Up Vds_pri,264VAC, Full Load, Vds Peak 680V
PMP41117 Start-Up Vds_pri, 90VAC, Full Load, Vds Peak 446VFigure 3-31 Start-Up Vds_pri, 90VAC, Full Load, Vds Peak 446V