A novel buck-boost converter with low stresses on switches and diodes

In this paper, a novel buck-boost converter with the voltage gain of D2/(1-D) is proposed. Besides high step-down gain, the merits of the proposed buck-boost converter include that the input terminal and the output terminal share the same ground, the output voltage is positive, and the voltage stresses on the power switches and the diodes are low. The operating principles, the steady-state analyses, and the small-signal model are presented and analyzed. Finally, the PSIM simulations and the circuit experiments are implemented to validate the proposed buck-boost converter.