Electrical and electronic circuits, components in the nature of transistors, inductors, capacitors and resistors, semiconductors and packages therefor consisting primarily of electrical and electronic circuits, and devices for power conversion, voltage conversion, power management and/or delivery of power, namely, buck converters, DC-DC converters, AC-DC converters, DC-AC converters, AC-AC converters, rectifiers, power factor correction circuits, half-bridge circuits and full-bridge circuits