SLUAAY1 October   2024 UCC28064A

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Interleaving PFC Principle of Operation
  6. 3Original PFC Design with Internal Line Feed-Forward block
  7. 4Current Phenomenon of Operating With UCC28064A Internal Line Feed Forward Function
  8. 5Achieving Adaptive Current Control PFC With UCC28064A
  9. 6Test Results Comparing Original PFC Design to Adaptive PFC Design
  10. 7Summary
  11. 8References

3 Original PFC Design with Internal Line Feed-Forward block

Line voltage feed-forward compensation provides several benefits:

  • Maintains constant bandwidth of the control loop versus line voltage variation
  • Avoids high current in the MOSFET, inductors, and line filter when line increases from low to high
  • Helps to keep simple phase management control
Voltage Feed Forward Function Block in UCC28064A Figure 3-1 Voltage Feed Forward Function Block in UCC28064A