一种抑制SiC MOSFET桥臂串扰的改进门极驱动设计

doi:10.19595/j.cnki.1000-6753.tces.171576

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Abstract Due to the effects of higher switching speed and parasitic parameters, crosstalk in a phase-leg configuration of traditional Silicon Carbide (SiC) MOSFET driver is more serious, while the existing drive circuits for crosstalk suppression usually bring the disadvantages of increasing switching loss, switching delay or complex degree. Combined with the method of gate impedance control and gate voltage control for crosstalk suppression, an improved gate driver was proposed in this paper. Firstly, the cause of crosstalk phenomenon and its typical solution were described. Secondly, based on the idea of adding additional new auxiliary circuit with a triode series-connected capacitor between gate-source terminals to decrease the gate driver impedance when crosstalk occurred, an improved gate driver design method was proposed on the premise of applying a negative-biased turn-off gate voltage. The operating principle and the key parameters design rules were also studied. Finally, a double-pulse testing platform was established to verify the effectiveness of the improved gate driver under the conditions of different drive resistances, input voltages and load currents. The results show that the crosstalk phenomenon of traditional SiC MOSFET driver is obvious; compared with the typical gate driver, the proposed method can reduce the switching loss and delay.

Key words： SiC MOSFET crosstalk suppression gate driver auxiliary circuit switching loss and delay

Received: 22 November 2017 Published: 29 January 2019

PACS:	TM133
	TN34

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	Li Hui
	Huang Zhangjian
	Liao Xinglin
	Zhong Yi
	Wang Kun

Cite this article:

Li Hui,Huang Zhangjian,Liao Xinglin等. An Improved SiC MOSFET Gate Driver Design for Crosstalk Suppression in a Phase-Leg Configuration[J]. Transactions of China Electrotechnical Society, 2019, 34(2): 275-285.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.171576 OR https://dgjsxb.ces-transaction.com/EN/Y2019/V34/I2/275

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