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

3.3.3 VCC Self-Bias Voltage

Figure 3-32 through Figure 3-34 show the VCC voltage at different AC input and load conditions.

PMP41117 90VAC, Open Load, VCC Charging Frequency 47Hz, fline 47HzFigure 3-32 90VAC, Open Load, VCC Charging Frequency 47Hz, fline 47Hz
PMP41117 VCC Voltage, 90VAC, Full Load, Zoom In at VBUS ValleyFigure 3-34 VCC Voltage, 90VAC, Full Load, Zoom In at VBUS Valley
PMP41117 VCC Voltage, 90VAC, Full LoadFigure 3-33 VCC Voltage, 90VAC, Full Load

Figure 3-35 through Figure 3-37 show the VCC voltage at open load and full load, 230VAC input.

PMP41117 264VAC, Open Load, VCC Charging Frequency 47Hz, fline 47HzFigure 3-35 264VAC, Open Load, VCC Charging Frequency 47Hz, fline 47Hz
PMP41117 VCC Voltage, 230VAC, 20V, Full Load, Zoom InFigure 3-37 VCC Voltage, 230VAC, 20V, Full Load, Zoom In
PMP41117 VCC Voltage, 230VAC, 20V, Full LoadFigure 3-36 VCC Voltage, 230VAC, 20V, Full Load