General properties and synthesis of PWM DC-to-DC converters

General properties that interrelate network complexity, attainable conversion ratios, and switch stresses are derived for pulse-width-modulated (PWM) DC-to-DC converters. The emerging synthesis procedure guarantees that complete classes of converters that satisfy a set of prescribed specifications are generated. The input specifications include the desired DC conversion ratio, nonpulsating terminal currents, possible coupling of inductors, the allowed number of switches, and, in particular, the number of active transistor switches. As a result, a number of novel PWM topologies are uncovered.