On the extraction of input and output impedance of PWM DC-DC converters

Abstract

The buck, buck-boost and boost converter, are the most popular types of DC-DC converters. The input/output charachteristics of these converters operating in Continuous Current Mode (CCM) is the object of considerations in this paper. Calculation of input/output impedance is done with the aid of MATLAB programming since the manual extraction, i.e. pencil-and-paper analysis, of input/output characteristics is cumbersome and error prone. This paper can be used as a tutorial on the extraction of input/output impedance of DC-DC converters.

Keywords

• DC-DC converter,impedance,output characteristics,Pulse Width Modulation (PWM)

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