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Closed-Loop Buck Converter Analysis: CCM and DCM Simulations in ECEN 5807

This lecture delves into the closed-loop buck converter example as explored in ECEN 5807. It covers the design process using Continuous Conduction Mode (CCM) small signal models to create a feedback compensator. Theoretical loop gain is analyzed alongside simulations using the CCM-DCM1 model, focusing on different load resistances (3 ohms for CCM and 0.25 ohms for DCM). Additionally, the effects of DCM on both open-loop and closed-loop disturbances in voltage (vg) are examined, providing key insights into compensation strategies.

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Closed-Loop Buck Converter Analysis: CCM and DCM Simulations in ECEN 5807

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  1. DCM Simulation ECEN 5807 Lecture 19

  2. Closed-loop buck converter example: Section 9.5.4

  3. In ECEN 5797, we used the CCM small signal model to design a feedback compensator:

  4. CCM design: theoretical loop gain

  5. Simulation of loop gain using CCM-DCM1 model

  6. Simulated loop gain T CCM: load resistance R = 3 ohms DCM: load resistance R = 25 ohms

  7. Simulation of Gvd Effect of DCM on open- and closed-loop disturbances in vg

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