TIDT446A June   2025  – July 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 Efficiency Data
    4. 2.4 Thermal Images
    5. 2.5 EMI
  7. 3Waveforms
    1. 3.1 AC Brown In and Brown Out
    2. 3.2 AC Start-Up and Shut-Down
    3. 3.3 Voltage Transition
    4. 3.4 Switching
    5. 3.5 Output Voltage Ripple
    6. 3.6 Load Transients
    7. 3.7 Short-Circuit Protection
    8. 3.8 Feedback Loop Open Protection

3.8 Feedback Loop Open 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. The OVP set is latch protection.

CH2: Vout, CH4: Primary switching node

PMP41163 Feedback Loop Open, Output Over-Voltage Protection 25.6VFigure 3-45 Feedback Loop Open, Output Over-Voltage Protection 25.6V