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

1 Introduction

A 1kW PFC pre-regulator can be designed with a single-stage boost converter or more effectively, with parallel interleaved CCM. However, each of these topologies have weaknesses in supplying high power. Notably, parallel interleaved CCM solutions are more expensive than the TM counterpart due to the larger boost inductors, higher performance rectifier diodes and larger, more expensive FETs that are required. Parallel Interleaved TM can achieve similar electrical performance, including PF, THD, and audible noise immunity at a lower overall cost.