关键词: 场控制晶闸管, 电流导通比率因子, SPICE等效电路模型

Abstract: In this paper, a factor of current conduction ratio α(I_A) is introduced to simulate the variation of conductivity modulation during the conduction of the device, and meanwhile, a SPICE model is established based on the working mechanism of MOS controlled thyristor (MCT). By utilizing the factor, it can not only simplify the analysis process of the latch-up effectively, but also quantify the relationship between the forward voltage and current to build the SPICE model based on the mechanism of device operation. At last, the simulation tests about the on-state characteristic and the discharging of RLC single-pulse had great coincidence with accurate data points from Sentaurus. And it also indicated that the introduced SPICE model has directive significance for the application of MCT in the SPICE simulation experiments.

Key words: MCT, the factor of current conduction ratio, SPICE model