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A selective polarity DC-DC converter with infinite output voltage levels

This paper presents a new DC-DC converter that is designed to provided selected polarities at desired voltage levels. With the new switching converter topology, the converter can boost and buck the input voltage and theoretically achieve infinite levels for either positive or negative polarities. This converter can provide a wide range of output voltage and use only one switch to perform the power conversion which simplifies the design of the gate drive. This configuration can basically satisfy the need of those applications which require voltage polarity selection Simulations results demonstrate the operation of the proposed circuit. Experimental data validate the simulation and effectiveness of the polarity and amplitude generation. Circuit mathematical models and state variables are demonstrated in each voltage polarity.