SDAA026 June   2025 TPSI3052

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Using a Solid-State Relay as an Isolated 15V Supply
  6. 3Topology of Totem Pole PFC for Applying Turn On Switch
  7. 4Original Implementation for Driving PFC Slow Switch at High-side and Low-side
  8. 5Achieving Performance for Driving PFC Slow Switch at High-side and Low-side
  9. 6Test Results Comparing Before and After for High-side Implementation
  10. 7Summary
  11. 8References

Abstract

Data center, or enterprise server switch-mode power supplies, typically implement a totem pole bridgeless Power Factor Correction (PFC) block using digital implementations instead of analog implementations to improve efficiency and reduce solution size and space. This application note explains how to protect PFC, achieve higher efficiency under DC input by configuring a circuit using TPSI3052. This can be used in designs to further reduct power loss and alleviate thermal issues. A simple external circuit is introduced and the working principle is explained in detail. Test results show that this is effective in solving heat generation and efficiency reduction issues due to current flow under DC input.