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

3.2 Configure a ZCD Signal as a T1 Event

Figure 3-3 shows additional T1 and T2 events (sourced from comparator, external trip, or sync events) that are added to generate AQ actions in the latest Type 4 ePWM module. For more details regarding new T1 and T2 features, see the corresponding technical reference manual. In this case, the rising edge of the ZCD signal is defined as a DCxEVTy event (active high), through the input XBAR, EPWM XBAR and digital compare (DC) submodule. Next, the DCxEVTy event is selected as the source for a T1 event.

Action-Qualifier Actions for ePWMxA and ePWMxB Outputs Figure 3-3 Action-Qualifier Actions for ePWMxA and ePWMxB Outputs