TIDT385 May   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 Considerations
    4. 1.4 Dimensions
  6. 2Testing and Results
    1. 2.1 Efficiency Graphs
    2. 2.2 Efficiency Data
    3. 2.3 Thermal Images
    4. 2.4 Bode Plots
  7. 3Waveforms
    1. 3.1 Switching Waveforms
    2. 3.2 Voltage Ripple
    3. 3.3 Load Transients
    4. 3.4 Start-Up Sequence
    5. 3.5 Input Telemetry
    6. 3.6 Smooth Transition

3.1 Switching Waveforms

Switching behavior is shown in the following figures.

PMP23366 Primary FET Q27, Drain to PGND
57VDC input, 20V / div, 2μs / div, measured 92.0V peak
Figure 3-1 Primary FET Q27, Drain to PGND
PMP23366 Secondary Synchronous FET Q28, Drain to GND
32VDC input, 5V / div, 2μs / div, measured 20.2V peak
Figure 3-2 Secondary Synchronous FET Q28, Drain to GND
PMP23366 Secondary Synchronous FET Q25, Drain to GND
57VDC input, 5V / div, 2μs / div, measured 15.8V peak
Figure 3-3 Secondary Synchronous FET Q25, Drain to GND