Fuzzy Logic Control Based Higher Order Dual Output Buck Converter

This paper presents the design of a dual-output buck converter. The baseline converter is a fourth-order buck converter with an input C-L filter. A dual output is generated with an additional inductor and two switching transistors. The converter is operated in continuous conduction mode (CCM) with three switching modes. The two fuzzy voltage-mode control loops are deployed to regulate the dual output voltages. A logic circuit is inserted to map the closed loop duty cycle commands to the three switching transistors of the proposed converter. The operation of the converter is verified through simulations performed in the MATLAB Sim-Power-Systems toolbox, where the converter’s performance is verified using both the load and line regulation tests.