The growing demand to reduce the size of chargers/adapters for mobile electronic devices such as laptops, tablets, smartphones, etc., motivates the increasing interest in the research for the development of high power-density adapters. Another important need of today’s society is to minimize the waste of energy. To guarantee this request, high efficiency adapters must be designed. The most used circuit topology for this type of application is the conventional flyback power converter. It has been widely used for low power application due to its simple design, as it requires few components, low cost, and insulation feature. However, in this topology, switches operate in hard-switching mode resulting in increased switching losses and high electromagnetic interference (EMI) noise.