SNOU215 January   2025

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5.   5
  6. 1System Description
    1. 1.1 System Block Diagram
    2. 1.2 Kit Contents
    3. 1.3 Voltage and Current Requirements
    4. 1.4 Design Consideration
      1. 1.4.1 Boost Inductor Design
      2. 1.4.2 High Frequency Power Switch Selection
      3. 1.4.3 Input AC Voltage Sensing
      4. 1.4.4 Bulk Voltage Sensing
      5. 1.4.5 Input Current Sensing
      6. 1.4.6 Baby Boost Design
      7. 1.4.7 Relay
      8. 1.4.8 Protection
        1. 1.4.8.1 Over Voltage Protection
        2. 1.4.8.2 Over Current Protection
  7. 2Software
    1. 2.1 Quickstart guide
    2. 2.2 Download Firmware
  8. 3Power Up
    1. 3.1 Required Equipment
    2. 3.2 Considerations
    3. 3.3 Start-Up Sequence
  9. 4Implementation Results
    1. 4.1 Start-Up Waveform
    2. 4.2 THD Performance
    3. 4.3 Power Factor
    4. 4.4 Efficiency Graph
    5. 4.5 E-meter Performance
    6. 4.6 Load Transients
    7. 4.7 Input Current Waveforms
    8. 4.8 AC Drop Test
    9. 4.9 Thermal Images
  10. 5Hardware Design Files
    1. 5.1 Design Files
  11. 6Related Documentation
    1. 6.1 Supplemental Content
  12. 7External Reference

7 External Reference

[1] B. Sun, S. Yu, B. Genereaux, L. Yin, "Design and Control Strategy of PFC During AC Dropout in a High Reliability and High-Power Density Server Power Supply", ECCE 2023

[2] B. Sun, S. Yu, T. Hud, "A Totem-pole PFC with Re-rush Current Control, Accurate E-metering, Low iTHD and High Power Density", APEC 2024

[3] Modular Hardware System – Common Redundant Power Supply (MCRPS) Base Specification. Open Compute Project, Version 1.02 RC2, Aug. 23, 2023. [Online].

[4] J. Kim, B. McDonald, S. Yu, “AC Dropout Algorithm for Digitally Controlled Totem-pole Bridgeless PFC”, APEC 2023

[5] B. Sun, “How to reduce THD of a PFC”, April 2023, EDN

[6] S. Yu, “Current sensing considerations in a bridgeless totem pole PFC”, June 2022, EDN

[7] R. Yin, “Five major trends in power supply design for servers”, August 2022, EDN

[8] B. Sun, “How to improve the power factor of a PFC”, January 2024, EDN