Computer-Aided Average-Value Modeling of Fourth-Order PWM DC-DC Converters

TitleComputer-Aided Average-Value Modeling of Fourth-Order PWM DC-DC Converters
Publication TypeConference Paper
Year of Publication2007
AuthorsDavoudi, A., J. Jatskevich, and P. L. Chapman
Conference NameCircuits and Systems, 2007. ISCAS 2007. IEEE International Symposium on
Pagination793 -796
Date Publishedmay.
Keywordscomputer-aided average-value modeling, conduction losses, DC-DC power convertors, electronic engineering computing, fourth-order capacitor switching stages, frequency-domain analysis, frequency-domain characteristics, hardware prototype, PWM DC-DC converters, PWM power convertors, state-space averaging, state-space methods, switching convertors, time-domain analysis, time-domain transients

Average-value modeling of dc-dc converters has been an area of active research for many years. Developing accurate average-value models of higher-order converters is further complicated by the presence of parasitics and waveform nonlinearity. A recently proposed numerical approach has been shown to be effective in including the effect of parasitics for second-order inductor-based dc-dc converters. This paper extends the numerical state-space averaging to the fourth-order capacitor-based switching stages. The proposed model takes into account conduction losses associated with switching stage components and is seamlessly functional in all operational modes. The proposed model is validated with a hardware prototype and detailed simulation and is shown to accurately predict large-signal time-domain transients as well as small-signal frequency-domain characteristics.


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