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

Abstract

To maximize efficiency and power density, there is a trend with using triangular current mode (TCM) totem pole PFCs with GaN to push for high switching frequency in power design. However, there are also challenges in the software control logic and the hardware circuit design. This application note discusses how to design robust PWM control logic with C2000™ microcontrollers and simplify the hardware circuits with the intelligent features of TI GaN.