Abstract
This document shows the experimental results of a head-to-head Gallium Nitride (GaN) High Electron Mobility Transistor (HEMT) versus Silicon Superjunction SJ MOSFET comparison used in ac-dc high power factor converters. Three variable-frequency converters have been considered: Transition Mode Power Factor Corrector boost, Quasi resonant High-Power Factor flyback, Quasi resonant high-power factor buck-boost. To fully assess the benefits of GaN HEMT, a controller with no frequency limitation function has been used.
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