Proposal of a dc-dc converter with wide conversion range used in photovoltaic systems and utility power grid for the universal voltage range

This paper describes the design and implementation of a Boost connected in cascade with a Quadratic Buck converter, with just one active switch, used to drive a LED string for public and private lighting purposes. The proposed converter supports a wide input voltage range that makes it possible to be supplied from 12 V_DC to 340 V_DC (240 V_AC), without any additional adjustment. It can be used in hybrid electrical systems supplied by photovoltaic systems or 110/220 V_AC from the utility power grid. Experimental results from an 11 W prototype are also presented.