SPRADQ1 February   2025 TMS320F2800133 , TMS320F2800135 , TMS320F2800137 , TMS320F2800155 , TMS320F2800157 , TMS320F280025C , TMS320F280037C-Q1 , TMS320F280039C , TMS320F280039C-Q1 , TMS320F280045 , TMS320F280049 , TMS320F280049C , TMS320F28P559SJ-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Potential Risks with Traditional PWM Configuration
  6. 3PWM Configurations for Robust Control
    1. 3.1 Create Additional Delay for the Sync Event for the PWM Counter
    2. 3.2 Configure a ZCD Signal as a T1 Event
  7. 4How to Capture the Phase Difference and Period of Multiphase Totem Pole PFCs
  8. 5How to Eliminate the External ZCD Circuits with TI GaN
  9. 6Summary
  10. 7References

6 Summary

The application note provides new PWM configurations for totem pole PFCs with TCM control to avoid shoot through issues. The document also proposes a simplified scheme to capture the phase difference and period for multiphase topologies. The application note also demonstrates how to leverage GaN with an integrated ZCD signal and related software logic for TCM totem pole PFCs to simplify system design.