Nonlinear SMPS AC Analysis = Buck Converter - V3p0

This is the same buck converter Mike Donnelly used to demonstrate TDFS Loop Stability Analysis. I have replaced the switch assembly with an equivalent circuit developed by Vatche Vorperian and introduced a hard-coded PWM modulator to drive the Vorperian switch.

The PWM modulator implements a spectral source quantity to generate the Fourier transform of a pulse train with variable duty cycles so that the frequency response includes the full nonlinear switching characteristic of the SMPS.

The design illustrates full switching frequency responses out to tens or even 100s of MHz.

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Norm

Joined April 18, 2016
Design added Thursday, May 30, 2019 | 2:51 pm PDT