Resonant Converter

Switching converters are broadly categorized into resonant and non-resonant types. A resonant converter controls switching operations using sinusoidal AC voltage or current. On the other hand, a non-resonant converter controls switching operations using pulse-width modulation. A quasi-resonant converter incorporates the advantages of both resonant and non-resonant converters to reduce switching losses, and controls the switching operation using a quasi-sinusoidal waveform that combines distorted and trapezoidal waveforms. Quasi-resonant converters are used in applications such as auxiliary power supplies in power conversion systems due to their high efficiency when dealing with stable loads.