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

3.8 Output Over Voltage Protection

By disconnecting output feedback, Vout ramps up and UCG28826 SW pin senses the output voltage. Once the sensed voltage triggers the OVP threshold, the OVP protection is triggered.

CH2: Vout, CH4: Vds primary switching

PMP41145 264VAC, OVP, Open LoadFigure 3-49 264VAC, OVP, Open Load