TIDT423 December   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 Dimensions
  6. 2Testing and Results
    1. 2.1 Efficiency Graphs
    2. 2.2 Voltage Regulation
    3. 2.3 Efficiency Data
    4. 2.4 Thermal Images
    5. 2.5 EMI
  7. 3Waveforms
    1. 3.1 Start-up and Shut Down Waveform
    2. 3.2 Switching
      1. 3.2.1 Voltage Stress
    3. 3.3 VCC Self Bias
    4. 3.4 Output Voltage Ripple
    5. 3.5 Load Dynamic Response
    6. 3.6 Peak Power
    7. 3.7 Short-Circuit Protection
    8. 3.8 Output Over Voltage Protection

3.3 VCC Self Bias

VCC was regulated across AC input and load condition. Figure 3-26 through Figure 3-31 show VCC waveforms.

CH1: Vds, CH2: VCC, CH3: HV Pin, CH4: Iout

PMP41145 VCC Voltage, 90VAC, Full LoadFigure 3-26 VCC Voltage, 90VAC, Full Load
PMP41145 VCC Voltage, 115VAC, Open Load, VCC Charging at Around 120Hz FrequencyFigure 3-28 VCC Voltage, 115VAC, Open Load, VCC Charging at Around 120Hz Frequency
PMP41145 VCC Voltage, 90VAC, Full Load, Zoom in at VBUS ValleyFigure 3-27 VCC Voltage, 90VAC, Full Load, Zoom in at VBUS Valley

Figure 3-29 through Figure 3-31 shows VCC at 230VAC input.

PMP41145 VCC Voltage, 230VAC, Open Load, VCC Charging at Around 120Hz FrequencyFigure 3-29 VCC Voltage, 230VAC, Open Load, VCC Charging at Around 120Hz Frequency
PMP41145 VCC Voltage, 230VAC, Full Load, Zoom-InFigure 3-31 VCC Voltage, 230VAC, Full Load, Zoom-In
PMP41145 VCC Voltage, 230VAC, Full LoadFigure 3-30 VCC Voltage, 230VAC, Full Load