SPRADJ1A June   2024  – August 2024 TMS320F280021 , TMS320F280023 , TMS320F280023C , TMS320F280025 , TMS320F280025C , TMS320F280033 , TMS320F280034 , TMS320F280037 , TMS320F280037C , TMS320F280039 , TMS320F280039C , TMS320F280041 , TMS320F280041C , TMS320F280045 , TMS320F280049 , TMS320F280049C , TMS320F28075 , TMS320F28076 , TMS320F28374D , TMS320F28374S , TMS320F28375D , TMS320F28375S , TMS320F28376D , TMS320F28376S , TMS320F28377D , TMS320F28377S , TMS320F28378D , TMS320F28378S , TMS320F28379D , TMS320F28379S , TMS320F28P550SG , TMS320F28P550SJ , TMS320F28P650DH , TMS320F28P650DK , TMS320F28P650SH , TMS320F28P650SK

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2HHC LLC Control Architecture and Logic Diagram
    1. 2.1 CMPSS
    2. 2.2 EPWM
    3. 2.3 Configurable Logic Block (CLB)
  6. 3C2000 Configurations in HHC LLC
    1. 3.1 CMPSS Configurations
    2. 3.2 EPWM Configurations
    3. 3.3 CLB Configurations
  7. 4System Control Method
    1. 4.1 Soft Start
    2. 4.2 Burst Mode Control
    3. 4.3 Minimum and Maximum Frequency Clamping
  8. 5Resonant Capacitor Voltage Sensing Design
  9. 6Summary
  10. 7References
  11. 8Revision History

4.2 Burst Mode Control

During the normal operation condition after the soft start, the burst mode control is implemented to reduce the control gain during light load or no-load conditions. Different with the control schemes in the soft start, the deadtime value of PWM only uses two fixed values, normal one and larger one, which is used to disable PWM output. Thus, compared to the control algorithm in Figure 4-2, it removes the duty cycle adjustment mode by setting the deadtime to a maximum value when Vc_v is lower than 0, as shown in Figure 4-3.

Control Algorithm During the Normal Operation Figure 4-3 Control Algorithm During the Normal Operation