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A Three-Level Voltage-Source Gate Driver for SiC MOSFETs in Synchronous Rectification Mode

The fast-switching behavior of Silicon Carbide (SiC) Metal-Oxide-Semiconductor Field-Effect Transistors (MOSFETs) has made these devices an ideal technology for high-frequency converters. However, parasitic circuit layout and other stray inductances in combination with the high di/dt and the device...

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Main Authors:	Giannakis, Andreas, Philipps, Daniel A., Blinov, Andrei, Peftitsis, Dimosthenis
Format:	Conference Proceeding
Language:	English
Subjects:	Buck converters gate driver Gate drivers MOSFET overvoltage Power engineering SiC MOSFET Silicon carbide Switches synchronous rectification Voltage
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creator	Giannakis, Andreas Philipps, Daniel A. Blinov, Andrei Peftitsis, Dimosthenis
description	The fast-switching behavior of Silicon Carbide (SiC) Metal-Oxide-Semiconductor Field-Effect Transistors (MOSFETs) has made these devices an ideal technology for high-frequency converters. However, parasitic circuit layout and other stray inductances in combination with the high di/dt and the device output capacitance cause excessive voltage overshoot across the MOSFETs. This paper presents a three-level voltage source gate driver suitable for minimizing the voltage overshoot in SiC MOSFETs operating in synchronous rectification mode. The operating principle of the driver relies on the trajectory of the gate-source voltage of the SiC MOSFET, which is adjusted in order to operate the device in active region. The driver's performance has been experimentally validated on a synchronous DC/DC flyback converter rated at 70V and 500W. From the experiments, it is observed that using the proposed gate driver, the overvoltage across the SiC MOSFETs is minimized by approximately 13% compared to a conventional two-level gate driver.
doi_str_mv	10.1109/CPE-POWERENG58103.2023.10227462
format	conference_proceeding
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language	eng
recordid	cdi_ieee_primary_10227462
source	IEEE Xplore All Conference Series
subjects	Buck converters gate driver Gate drivers MOSFET overvoltage Power engineering SiC MOSFET Silicon carbide Switches synchronous rectification Voltage
title	A Three-Level Voltage-Source Gate Driver for SiC MOSFETs in Synchronous Rectification Mode
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