New, zero voltage switching, high frequency boost converter topology for power factor correction

Abstract

This paper introduces a technique for combining zero-voltage-switching with boost converter technology to enable high frequency, high efficiency operation of the converter. The combination creates a new topology which is effective to meet the power factor correction and harmonic reduction requirements of new EMC standards. The unique topology provides limitation of the recovery current of the boost diode and uses the energy recovered from the reverse current to discharge the intrinsic and stray capacitance of the boost switch while transferring this recovered energy to the output. With the main switching losses removed, the frequency can be increased to reduce the size of the boost inductor while maintaining continuous conduction mode operation for improved input noise filtering.