-GaO Field Plate Schottky Barrier Diode With Superb Reverse Recovery for High-Efficiency DC&#x2013;DC Converter<italic/><sub/><sub/>

Abstract

β-Ga2O3 Schottky barrier diodes with field plate (FP-SBDs) are fabricated and their SPICEcompatible model are constructed for double-pulse test circuit and DC-DC boost converter simulations. The reverse recovery time ( $t_{{\mathrm {rr}}}$ ) of the β-Ga2O3 SBD is 8.8 ns and its reverse recovery charge ( $Q_{{\mathrm {rr}}}$ ) is 8.33 nC when switching from a forward current of 1 A to a reverse bias voltage of 100 V with a di/dt of 400 A/μs, which is analogous with the prediction of our model. Device with the radius of 500 μm was fabricated, a current of 2 A can be obtained at the forward voltage of 2 V, meanwhile, the breakdown voltage is 467 V. The Ga2O3-based converter module after device packaging with TO-220 reveals a comparative efficiency to that of the SiC-based converter under multiple conditions, and reached up to 95.62% at the input voltage of 200 V. The decent performance of Ga2O3 FP-SBD and its DC-DC converter indicates great potential in power application.

Keywords

• β-Ga₂O₃
• Schottky barrier diode
• SPICE-compatible model
• double-pulse test circuit
• DC-DC converter