NDLI: Dynamic effects of mismatched time constants in DC-DC converters with inductor DCR current sensing

Content Provider	IEEE Xplore Digital Library
Author	Spiazzi, G. Buso, S. Corradini, L.
Copyright Year	2014
Description	Author affiliation: Dept. of Inf. Eng. (DEI), Univ. of Padova, Padua, Italy (Spiazzi, G.; Buso, S.; Corradini, L.)
Abstract	This paper analyzes the effects of time constant mismatch on the dynamic behavior of current-controlled DC-DC converters that employ the lossless DCR inductor current sensing technique. Modeling of such mismatch is often oversimplified in the literature and treated as a simple modification of the small-signal modulator gain. The analysis proposed in this paper, on the contrary, demonstrates that time constant mismatch also affects the current loop gain in the low frequency region. Furthermore, the analysis indicates that the mismatch can even be intentionally exploited so as to achieve specific advantages in current-controlled DC-DC converters. Modified small-signal models for both peak and average current-mode control techniques are proposed and discussed, and a two-phase synchronous Buck converter for battery charger applications is considered to experimentally validate the theoretical analysis.
Starting Page	257
Ending Page	264
File Size	878293
Page Count	8
File Format	PDF
ISBN	9781479957767
DOI	10.1109/ECCE.2014.6953402
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-09-14
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Frequency modulation Transfer functions Sensors Inductors Voltage control Gain
Content Type	Text
Resource Type	Article

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