2nd-order voltage-boosting converter based on charge pump and coupling inductor with passive voltage clamping

A new 2nd-order voltage-boosting converter based on the concept of the charge pump and coupling inductor, together with a passive voltage clamping circuit which pumps part of the leakage inductance energy to the output, is presented herein. Therefore, by doing so, the efficiency tends to be flat between the minimum and rated loads to some extent, similar to the behavior of the KY converter. Moreover, the implementation of the passive voltage clamping circuit for this converter with multiphase is very easy. Above all, there are two types of 2nd-order voltage boosting converters in this paper, depending on gate driving signals without changing any circuit structure. In this paper, the basic operating principles of the proposed converter are firstly described, and secondly some simulated and experimental results are provided to verify the effectiveness of the proposed converter topology.