While most domestic appliances and office equipment items are plugged directly into wall outlets and powered from high-voltage alternating current (AC), nearly all of their internal circuitry requires a low-voltage direct current (DC). Accordingly, power supplies are required to convert AC voltage to low DC voltage. According to the research by Ecos Consulting, roughly 3 billion AC/DC power supplies are currently used in the U.S. and about 10 billion are used globally [1, 2].