Quadratic step-down dc-dc converters based on reduced redundant power processing approach

Rodrigo Loera-Palomo, Jorge Alberto Morales-Saldaña , Elvia Palacios-Hernández
IET Power Electron., 2013, Vol. 6, Iss. 1, pp. 136-145. Indizada JCR, doi: 10.1049/iet-pel.2012.0122 , 2013.


In the technical literature the interconnection of switching converters to increase power handling capabilities on dc applications has been widely reported. This study presents a family of switching step-down dc–dc converters based on the principle of reduced redundant power processing (R2 P2 ). This states that the power transfer from input port to output port on interconnected converters can be reduced, if a non-cascading connection is used. As shown in this study, the principle R2 P2 is useful for developing new converters. The resulting converters are formed by a pair of L–C networks and a pair of active switches, also they have wide conversion ratios and quadratic dependence with respect to the duty ratio. In this study, the voltage conversion ratios and steady-state operating conditions are derived for the proposed converters, which are verified by experimental results.