Two New Boost Converters Exhibiting Zero-Ripple Input Current Both in CCM and DCM Operation

Abstract

In this paper two new Boost converters with zero-ripple input current are obtained, this feature being preserved both in continuous conduction mode (CCM) and in discontinuous conduction mode (DCM). The integrated magnetics technique is used in order to achieve negligible ripple in the input current. These converters are obtained from the same original converter by adding a series LC cell. It is shown that this series LC cell can be connected either in parallel to the transistor or in parallel to the freewheeling diode. A dc analysis is performed and design equations are provided both for CCM and DCM operation. The theoretical approach is validated through simulation results.