Diamond Schottky-Diode in a Non-Isolated Buck Converter

Konferenz: PCIM Europe 2019 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
07.05.2019 - 09.05.2019 in Nürnberg, Deutschland

Tagungsband: PCIM Europe 2019

Seiten: 5Sprache: EnglischTyp: PDF

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Reiner, Richard; Zuerbig, Verena; Pinti, Lukas; Reinke, Philipp; Meder, Dirk; Moench, Stefan; Benkhelifa, Fouad; Quay, Ruediger; Cimalla, Volker; Nebel, Christoph; Ambacher, Oliver (Fraunhofer Institute for Applied Solid State Physics IAF, Germany)

This work presents the in-circuit operation of a diamond Schottky-diode in a non-isolated buck converter for LED applications at mains voltage. A Schottky-diode on boron doped monocrystalline diamond substrate was assembled in an engineering package. Test structures show breakdown voltages up to 1250 V, current densities up to 470 A/cm2, a reverse charge below 1 nC and a decreasing on-resistance with increasing temperature. The packaged device was operated with a peak current of 1 A in a 30W buck converter with stable operation at 125deg C. The converter achieves a maximum total efficiency of 87% at 14 W.