Robust switching strategy for buck-boost converter

This paper presents a procedure to design a robust switching strategy for the basic Buck-Boost DC-DC converter utilizing switched systems´ theory. The converter dynamic is described in the framework of linear switched systems and then sliding-mode controller is developed to ensure the asymptotic stability of the desired equilibrium point for the switched system with constant external input. The inherent robustness of the sliding-mode switching rule leads to efficient regulation of the output voltage under load variations. Simulation results are presented to demonstrate the outperformance of the proposed method compared to a rival scheme in the literature.