SLUAAU4 June   2024 UCC28750

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Retrofit Items
  6. 3Implement SR with UCC24612-1EVM
  7. 4UCC28750 Benefits in Aux Power
  8. 5Common Issues
  9. 6Summary
  10. 7References

Abstract

Flyback topology is major used in the low power PSU (<100W), because it is easy to design and cost effective. Most of high power PSU also need the Auxpower to support the Vdd and fan power supply, and the power rating is also under 100W, so flyback topology is used at every PSU.

UCC28750 is a highly-integrated current-mode, continuous-conduction-capable, PWM controller optimized for high performance, low standby power, and cost effective offline flyback converter applications using an opto-coupler.

This application note introduces how to retrofit the UCC28750 EVM to fit the Aux power and also explain the benefit for this application.