A comparative study of small-signal average models for average current mode control

This paper presents a critical evaluation of four small-signal average models for average current mode control. The four models are divided into two groups. One group includes sampling effect in the model formulation that has been used successfully for peak current mode control, and the other does n...

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Bibliographic Details
Published inProceedings of The 7th International Power Electronics and Motion Control Conference Vol. 3; pp. 1729 - 1736
Main Authors Ruqi Li, O'Brien, Tony, Lee, John, Beecroft, John, Hwang, Kenny
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.06.2012
Subjects
Average current mode control
DC-DC converters
Integrated circuit modeling
parameter effects
Predictive models
Pulse width modulation
Resonant frequency
small-signal average models
Sun
Transfer functions
Voltage control
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Summary:This paper presents a critical evaluation of four small-signal average models for average current mode control. The four models are divided into two groups. One group includes sampling effect in the model formulation that has been used successfully for peak current mode control, and the other does not include it. The models are evaluated against experimental data generated by using a Buck converter as a common test bed under various converter circuit and operating parameter changes. For practical design purposes, results are interpreted and explained by employing a simplified version of the second group of models to reveal more insight into average current model control. The study finds similarities and differences among these models as well as their limitations in predicting small-signal dynamics of average-current-mode-controlled DC-DC converters.
ISBN:9781457720857
145772085X
DOI:10.1109/IPEMC.2012.6259097