Current-Loop Control In Switching Converters Part 4: Clarifications Of Existing Models

Focus:

The progression of models, from the low-frequency averaged model through Ridley’s sampled-loop model and on to Tan and Middlebrook’s effort to unify them in the unified model will continue in part 5 of this article series in the refinement of the unified model, the refined model. But here in our part 4 discussion of current-mode control, we digress in our derivation of a unified model by taking a closer look at the existing models. The goal here is to obtain a better understanding of the various current-loop models by uncovering the similarities among these models as well as some of their underlying assumptions. These concepts set the stage for explaining the refined model of current-mode control that will be presented in part 5.

What you’ll learn:

• How to understand similarities and difference among different models of current-mode control

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Author & Publication:

Dennis Feucht, Innovatia Laboratories, Cayo, Belize, How2Power Today, Dec 22 2011

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