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T-Space at The University of Toronto Libraries >
School of Graduate Studies - Theses >
Master >

Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/18135

Title: Multiphase Optimal Response Mixed-signal Current Program Mode Controller
Authors: Alico, Jurgen
Advisor: Prodic, Aleksandar
Department: Electrical and Computer Engineering
Keywords: power converters
digital control
current program mode
multiphase switch mode power supplies
Issue Date: 14-Dec-2009
Abstract: The primary focus of this thesis is to present a simple and practical implementation of an optimal-time response controller for multiphase interleaved dc-dc SMPS. This novel solution enables equal current sharing between phases not only in steady-state, but also during load transients, as well as bump-less transition between those two states. A digital voltage loop and multiple analog peak current programmed mode current loops are combined to implement a capacitor charge balance control algorithm with fairly simple hardware. This algorithm provides recovery from a disturbance in a single on-off switching action, which is performed in virtually the fastest possible time. The hybrid interface between the loops is provided through a structure combining a sample-and-hold circuit and a relatively slow successive-approximation DAC that provides control signals for all the loops in the system. Furthermore, for operation under light load conditions, the controller automatically switches into simply implemented pulse-frequency mode of operation.
URI: http://hdl.handle.net/1807/18135
Appears in Collections:Master

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