High voltage GaN-based Schottky diodes in non-isolated LED buck converters

Abstract

This work demonstrates the suitability of AlGaN/GaN-on-Si Schottky diodes in a non-isolated buck converter for LED applications. To the authors' knowledge, this is the first time that AlGaN/GaN-on-Si Schottky diodes have been employed as flyback diodes in a non-isolated buck converter. First the diodes are specifically developed and characterized. Afterwards the diodes are tested in an advanced non-isolated buck converter for LED modules. The circuit is characterized and the approach is discussed and compared to state-of-the-art solutions.