标题：A Gate Driver of SiC MOSFET for Suppressing the Negative Voltage Spikes in a Bridge Circuit
作者：Zhou, Qi; Gao, Feng
作者机构：[Zhou, Qi; Gao, Feng] Shandong Univ, Sch Elect Engn, Jinan, Peoples R China.
会议名称：31st Annual IEEE Applied Power Electronics Conference and Exposition (APEC)
会议日期：MAR 20-24, 2016
来源：APEC 2016 31ST ANNUAL IEEE APPLIED POWER ELECTRONICS CONFERENCE AND EXPOSITION
关键词：SiC MOSFET; gate driver; bridge configuration; auxiliary transistor
摘要：SiC MOSFET has low on-state resistance and can work on high switching frequency, high voltage and some other tough conditions with less temperature drift, which could provide the significant improvement of power density in power converters. However, for the bridge circuit in an actual converter, high dv/dt during fast switching transient of one MOSFET will amplify the negative influence of parasitic components and produce significant voltage spikes on the complementary MOSFET, which will threaten its safe operation. This paper proposes a new gate driver circuit for SiC MOSFET to attenuate the negative voltage spikes in a bridge circuit. The proposed gate driver adopts a simple voltage dividing circuit to generate a negative gate-source voltage as traditional and a passive triggered transistor with a series capacitor to suppress the negative voltage spikes, which could satisfy the stringent requirements of fast switching SiC MOSFETs under high dc voltage condition with low cost and less complexity. An analysis is presented in this paper based on the simulation and experimental results with the performance comparison evaluated.