TIDT353 September   2023

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Required Equipment
    3. 1.3 Considerations
    4. 1.4 Dimensions
    5. 1.5 Test Setup
  7. 2Testing and Results
    1. 2.1 Bode Plots
    2. 2.2 Thermal Images
  8. 3Waveforms
    1. 3.1 Load Transient Response
    2. 3.2 Start-Up Sequence
    3. 3.3 Output Voltage Ripple

3.2 Start-Up Sequence

Soft start behavior is shown in the following figures.

In the following waveforms, channel 1 in dark blue is load current; channel 3 in purple is output voltage; channel 4 in green is primary current.

GUID-5886C6D0-8A78-44C1-908F-D2D4CD48F219-low.pngFigure 3-11 Soft Start With 400-VDC Input,
0-A Load
GUID-7B48CBD9-54D6-40A0-82E0-E27B3C1D957B-low.pngFigure 3-13 Soft Start With 400-VDC Input, 84-A Load
GUID-58C4E621-E01B-4A1C-95B5-C30A64347B57-low.pngFigure 3-12 Soft Start With 400-VDC Input,
42-A Load