High frequency DC/DC conversion using novel concept of multiple frequency operation

A novel concept in high frequency DC/DC power conversion is proposed. A switch feeds the energy from a DC voltage source to an inductor, which is an integral part of the resonator-rectifier combination. The resonance in the resonator-rectifier combination takes place at a higher frequency as compared to the switch operating frequency and energy is transferred to the output load until the oscillations in the resonator-rectifier combination die out. This allows high frequency operation of the circuit and low frequency operation of the switch. Output voltage regulation is achieved by controlling the amount of energy input to the inductor either by pulse width modulation and/or off-time variation. With the proposed technique, good efficiency is achieved even in the megahertz range without any additional components for zero voltage or zero current switching. Losses are significantly reduced. The simulation results provided support the validity of the concept