Noise Suppression Characteristics of a dc-to-dc Converter

Analytical and experimental considerations of the noise suppression characteristics of a typical dc-to-dc converter with a two-winding reactor are described. The high-frequency equivalent circuits for external noise are presented which are composed of parasitic parameters and have parallel and series resonances. The high-frequency responses calculated from these equivalent circuits agree well with the experimental results. Effects of the parasitic parameters on the noise suppression capability are discussed.