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In this paper, an advanced isolated three-port DC-DC converter for electrical vehicle (EV) battery charging applications is proposed. The converter has a unique approach to charge main (high voltage) and auxiliary (low voltage) vehicle batteries from single input constant dc source through multioutput capacity by using an advance pulse width modulated technique under individual and simultaneous charging. The Existing multi-port converters applied for similar applications suffer with issues has been addressed by the proposed converter in-terms of minimal device count, lower voltage stress and the soft switching in various conditions. Later on, the converter performance is verified through simulation using SIMULINK software in MATLAB environment and the converter is able to achieve efficiency of 95%. Three-port Pulse Width Modulated DC-DC Converter for Vehicular Applications