A new technique for reducing switching losses in pulse-width-modulated boost converter

Abstract

A circuit technique that reduces switching losses of the pulse-width-modulated boost converter is described. The losses are reduced by using a new switch cell that consists of an inductor, a diode, a capacitor, a main switch, and an auxiliary switch. This technique reduces the reverse-recovery-related losses of the rectifier with the inductor that controls the di/dt rate of the rectifier during its turn-off. In addition, the main switch turns off at zero current, while the auxiliary switch turns on at zero voltage. Due to the zero-current switching of the main switch, this technique is particularly suitable for boost converter implementations with insulated-gate bipolar transistors.