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

Inrush Current

During this test, the AC source was turned on and input current and voltage, as well as the PFC voltage, were measured (with 20-MHz BWL). Figure 3-14 and Figure 3-15 show the inrush current limitation during start-up at VIN = 115 VAC, F = 400 Hz, no load.

GUID-20220527-SS0I-CDT1-XV9H-12M0B7XMKGMP-low.pngFigure 3-14 Time Division: 2 ms/div, (C2: VPFC, C1: VIN, C3: IIN)
GUID-20220527-SS0I-G2HH-CM2B-JZDXNQDBRB4T-low.pngFigure 3-15 Time Division: 20 ms/div, (C2: VPFC, C1: VIN, C3: IIN)