Multivariable control of Single-Inductor Dual-Output buck converters

Behrooz Bahrani, Jaya Deepti Dasika, Maryam Saeedifard, Alireza Karimi, Alfred Rufer

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearch

6 Citations (Scopus)


Cross regulation is the main technical drawback of a Single-Inductor Multiple-Output (SIMO) dc-dc converter. This paper proposes a multivariable digital controller to suppress the cross regulation of a Single-Inductor Dual-Output (SIDO) buck converter in Continuous Conduction Mode (CCM) operation. The controller design methodology originates from the open-loop shaping of the Multi-Input Multi-Output (MIMO) systems. The control design procedure includes: (i) determination of the non-parametric model of a SIDO buck converter at its rated operating point, (ii) determination of the class of the controller, and (iii) converter open-loop shaping by convex minimization of the square second norm of the error between the converter open-loop transfer function and a desired open-loop transfer function. The proposed controller minimizes the coupling between the outputs of the SIDO buck converter and provides satisfactory dynamic performance in CCM operation. This paper describes the theoretical aspects involved in the design procedure of the controller and evaluates the performance of the controller based on simulation studies and experiments.

Original languageEnglish
Title of host publication28th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2013
Subtitle of host publicationLong Beach, CA, United States; 17-21 March 2013
Place of PublicationPiscataway NJ USA
PublisherIEEE, Institute of Electrical and Electronics Engineers
Number of pages6
ISBN (Electronic)9781467343558
ISBN (Print)9781467343541
Publication statusPublished - 2013
Externally publishedYes
EventAnnual IEEE Applied Power Electronics Conference and Exposition (APEC) 2013 - Long Beach, United States of America
Duration: 17 Mar 201321 Mar 2013
Conference number: 28th


ConferenceAnnual IEEE Applied Power Electronics Conference and Exposition (APEC) 2013
Abbreviated titleAPEC 2013
CountryUnited States of America
CityLong Beach

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