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

1.4 Test Setup

  1. Connect the source VS1 to J3-1 and J3-2; earth connection to J3-3
  2. Connect the load to terminals “30V” (plus) and “R_SENSE” (minus)
  3. Attach a current probe in series to VS1 to measure the input current
  4. Attach a current probe in series to L7 (by disconnecting one pin) to measure the resonant current
  5. Turn on VS1 (accepted range: 96 VAC…134 VAC).
  6. Increase the load on the output
    WARNING: The following step involves working with high voltage. To minimize the risk of personal injury, never touch the board or its electrical circuits, as they could be at high voltages capable of causing an electrical shock hazard.
  7. After turn off, discharge the capacitors C1A, C1B, and C1C (PFC capacitors) by means of an external resistor or active discharge circuit