TIDT439 March   2025

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5. 1Test Prerequisites
    1. 1.1 Key System Specifications
    2. 1.2 Required Equipment
    3. 1.3 Considerations
    4. 1.4 Test Setup
    5. 1.5 Power Up Procedure
  6. 2Testing and Results
    1. 2.1 Efficiency Graphs
    2. 2.2 Efficiency Data
    3. 2.3 Thermal Images
  7. 3Waveforms
    1. 3.1 Start-up Waveform
    2. 3.2 Input Current Waveform
    3. 3.3 Load Transients
    4. 3.4 AC Drop Test
    5. 3.5 THD and PF
    6. 3.6 E-Meter Performance

1.3 Considerations

  • This PFC needs to be used together with the C2000 control card TMDSCNCD280039C, PMP20306 isolated bias supply reference design and LMG3522EVM-042 EVM. The LMG3522EVM-042 EVM needs some modification: replace LMG3522R030 with LMG3427R30, change R20 to 0Ω, remove C39.
  • Due to the totem-pole topology, the PFC ground (PGND) is floating. This can lead to common-mode current issues with improper test equipment setups. Always use isolated differential voltage probes when measuring voltage signals.