A topological evaluation of isolated DC/DC converters for Auxiliary Power Modules in Electrified Vehicle applications

This paper presents a comparative evaluation of the suitable isolated DC-DC converters for the Auxiliary Power Module (APM) in Electrified Vehicle applications. The basic Single-Input-Single-Output (SISO) DC-DC converter topologies are reviewed. Different configurations of Single-Input-Multiple-Output (SIMO) and Multiple-Input-Multiple-Output (MIMO) topologies and their control strategies are presented. By applying full bridge current doubler as the base topology, different multiple topology configurations are compared from a MOSFET switch efficiency drop and cost aspect. Results of the study show that the Input-Series-Output-Parallel (ISOP) topology configuration presents better performance for the APM application in terms of switch efficiency and cost.