TIDT292 June   2022

 

  1.   Description
  2.   Features
  3.   Applications
  4. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Required Equipment
    3. 1.3 Dimensions
    4. 1.4 Test Setup
  5. 2Testing and Results
    1. 2.1 Efficiency Graphs
    2. 2.2 Efficiency Data
    3. 2.3 Power Factor and iTHD Versus Load, VAC and Frequency
      1. 2.3.1 Power Factor and iTHD Tables
    4. 2.4 Thermal Image
    5. 2.5 Bode Plots
    6. 2.6 Input AC Current Measurements: Compliance to DO160 Harmonic Limits
  6. 3Waveforms
    1. 3.1 Switching
    2. 3.2 Output Voltage Ripple
    3. 3.3 AC Waveforms (Input Voltage and Current, PFC Output Voltage)
    4. 3.4 Load Transients
    5. 3.5 Inrush Current
    6. 3.6 Start-Up Sequence
    7. 3.7 Shutdown

3.2 Output Voltage Ripple

The 30 V (VOUT) and PFC (VPFC) output voltage ripples were measured by supplying the converter at 115 VAC, 400 Hz at full load; the bandwidth limit of the scope has been set to 20 MHz.

GUID-20220527-SS0I-9MGP-DCXK-C7C6NFNMNXRL-low.pngFigure 3-4 PFC and VOUT Voltage Ripple (C2: VPFC, C4: VOUT)
GUID-20220527-SS0I-KDLS-10VD-26C9WBVRWCRG-low.pngFigure 3-5 PFC and VOUT Voltage Ripple at Time-base = 500 μs/div
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