Resonant DC/DC converter with class E inverter and class E rectifier using thinned-out method

Resonant DC/DC power converters have high-efficient power conversion at high operating frequency. However, most resonant DC/DC power converters need frequency control to regulate the output voltage. To alleviate the problem, the thinned-out method can regulate the output voltage at a fixed operating frequency by thinning-out some pulses of the switch voltage. Another advantage of thinned-out method is that it can operate with low noise and simple systems. The purpose of this paper is to propose the application of the thinned-out method to a conventional class E rectifier and improve the low output regulation. Some experimental results are shown as a class E² resonant DC/DC power converter. The measured efficiency μ was maintained over 60 percent for varying the output voltage from 3.3 V to 2.3 V. The experimental results were in good agreement with the theoretical values