SLUAAD0 September   2021 UCC28064A

 

  1.   Trademarks
  2. 1Introduction
  3. 2Normal Theory of Multi Phases Control UCC28070 and UCC28064A Operation
  4. 3Achieving Adjustable Phase Control Operation with UCC28064A
  5. 4Achieving Multi Phases Control Operation
    1. 4.1 Disable Feedback of Secondary (Connecting VSENSE and VREF Directly)
    2. 4.2 Disable Feedback of Secondary (Connecting VSENSE and VREF with Diode)
    3. 4.3 External 4 Multi-phase Mode Control Circuit of UCC28064A
    4. 4.4 Detail Operating for External Paralleling Two-Power Stages Control Circuit of UCC28064A
    5. 4.5 Test result for External Paralleling two power stages control circuit of UCC28064A
  6. 5Summary
  7. 6References

5 Summary

From the test results and accompanying waveforms, it was demonstrated that the paralleled TM interleaved PFC controller using simple external components was able to achieve natural load balance without requiring an additional load-sharing device. Additionally, this solution lends itself to smaller inductors, lower switching frequencies and smaller peak currents resulting in high Power Factor (PF) and low Total Harmonic Distortion (THD). It was demonstrated that multi-phase load sharing can be accomplished through a simple parallel solution consisting of two UCC28064A controllers.