Access Restriction

Author Ordonez, M. ♦ Quaicoe, J.E. ♦ Iqbal, M.T.
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©2007
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Physics ♦ Electricity & electronics ♦ Technology ♦ Engineering & allied operations ♦ Applied physics
Subject Keyword Transient response ♦ Buck converters ♦ Voltage control ♦ Capacitors ♦ Bandwidth ♦ Transient analysis ♦ Electric variables control ♦ Inductors ♦ Control systems ♦ Paramagnetic resonance
Abstract The transient behavior of synchronous buck converters, using critical parameters, is investigated in this work under high current slew-rate load transients. Critical parameters are defined as the combination of parameters for which the peak transient response is dominated by the effect of the capacitor Equivalent Series Resistance (). Given the importance of the effect of in low-voltage, high- current synchronous buck converters, an effective normalization method is developed in this paper to reduce the dependence on other parameters, thus providing valuable generality to the transient analysis. A set of critical normalized expressions valid for any possible synchronous buck converter is derived, which can be used as a useful design tool to meet transient specifications. By using critical parameters, both transient recovery time and peak voltage regulation can be met while keeping and to a minimum. A detailed characterization of the effect of is presented, and the normalized approach clarifies the role of in the transient response. A critical design example is presented where the parameters of the converter are obtained by performing a simple denormalization. Finally, the critically designed converter is evaluated using boundary controllers as well as classical current- and voltage-mode controllers to assess the influence of the control scheme on the transient response of the converter.
Description Author affiliation: Memorial Univ. of Newfoundland, St. John's (Ordonez, M.; Quaicoe, J.E.; Iqbal, M.T.)
ISBN 9781424406548
ISSN 02759306
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research ♦ Reading
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2007-06-17
Publisher Place USA
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Size (in Bytes) 421.65 kB
Page Count 7
Starting Page 2189
Ending Page 2195

Source: IEEE Xplore Digital Library