Simulation of the Step-Down DC-DC converter with Si-and SiC-diodes

Abstract

The article presents the results of simulation of pulse DC-DC step-down converter with different types of diodes. Simulations have shown that the use of a silicon carbide diode instead of convenient silicon diode gives the best performance. It also shown, the parasitic inductances in the circuit significantly increase the power losses when the diode is switched-off and reduce the losses when the transistor is switched-on.