SLUAAR8 December   2023 TPS56837

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Review of CCM Output Voltage Ripple in Buck Converter
  5. 2Calculation of DCM Output Voltage Ripple in D-CAP Buck Converter
  6. 3Bench Test Results and Error Analysis
    1. 3.1 Bench Test Results
    2. 3.2 Error Analysis
      1. 3.2.1 Variation in High-Side FET on Time
      2. 3.2.2 Variation in Component Value
  7. 4Comparison Between DCM and CCM Output Voltage Ripple in D-CAP Buck Converter
  8. 5Summary
  9. 6References

5 Summary

In conclusion, this application note introduces method to estimate output voltage ripple in DCM operation for D-CAP control mode device. Error analysis is conducted to show elements that could affect correlation. In the end, comparison between output voltage ripple in DCM operation and CCM operation is conducted as well as fundamental analysis, giving theoretical proof that DCM VOUT ripple is higher than CCM Vout ripple in D-CAP buck converters.

To emphasize, this article is not only designed for D-CAP buck converter, but also designed for D-CAP2 and D-CAP3 buck converter.