Design of buck type switched-mode power supplies using non-ideal components

Some fundamental mathematical relationships governing operation of buck-type switched-mode power supplies using non-ideal devices are explored. Limitations of non-ideal devices are noted. Methods of reducing stresses on the switching element and reducing reverse recovery current in the freewheeling diode are considered. Design of practical buck-type supplies employing these methods is discussed. The trade off possibilities that exist between five key parameters involved in a practical design are given particular attention.