Paper Info
Title
Mixed-mode simulations to check stability of an adaptive constant on-time DC-DC converter
Abstract
In this paper we consider performances of a version of a constant on-time (COT) DC/DC converter. There is a renewed interest in COT converters since they offer interesting features such as speed and low cost implementation. The duty cycle of these converters is varied by acting on the working frequency and this introduces problems in modeling, in deriving transfer functions and in studying stability properties. Largely adopted averaging methods, that assume that the control loop bandwidth is much smaller than the converter switching frequency, risk to be no longer applicable since COT converters do not satisfy this hypothesis. Also conventional methods and techniques that exploit Floquet theory and variational model can not be applied since differential algebraic equations modeling switching converters show discontinuities in the vector field (switching). In this paper we use saltation matrices to allow the application of consolidated numerical techniques to the specific case of COT converters and, more in general, to the broad class of switching converters modeled by mixed analog/digital models.
Year
DOI
Venue
2013
10.1109/ECCTD.2013.6662270
Circuit Theory and Design
Keywords
Field
DocType
DC-DC power convertors,circuit simulation,matrix algebra,switching convertors,transfer functions,DC-DC converter stability,adaptive DC-DC converter,averaging method,constant on-time DC-DC converter,control loop bandwidth,mixed analog-digital model,mixed mode simulation,saltation matrices,switching converter,transfer function
Computer science,Duty cycle,Control theory,Flyback converter,Forward converter,Ćuk converter,Converters,Electronic engineering,Differential algebraic equation,Charge pump,Floquet theory
Conference
Citations 
PageRank 
References 
0
0.34
6
Authors
4
Name
Order
Citations
PageRank
Federico Bizzarri113131.78
Angelo Brambilla217231.44
Stefano Saggini3143.08
Giancarlo Storti Gajani49613.09