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从半导体器件物理角度出发,分析了P+-N-N+功率二极管零输入态下正向恒定电流IF与反向电流峰值IRM的解析关系。根据误差函数与初等函数的近似关系,推出简约解析关系式:(IRM/IF)=a+b×ln(IF+1)。在检测电路中引入反向平衡电流源,利用仿真软件Silvaco-Atlas获得瞬态仿真实验数据。通过Matlab软件对实验数据进行拟合分析,并对简约式适用范围和相关结论进行了验证。研究结果对P+-N-N+功率二极管的应用和相应电路系统的可靠性具有指导意义。
From the physical point of view of the semiconductor device, the analytical relationship between forward constant current (IF) and reverse current peak (IRM) under zero input state of P + -N-N + power diode is analyzed. According to the approximate relationship between the error function and the elementary function, a simple analytic relation is introduced: (IRM / IF) = a + b × ln (IF + 1). In the detection circuit to introduce reverse-balanced current source, the use of simulation software Silvaco-Atlas transient simulation experimental data. Through the Matlab software to fit the experimental data analysis, and contracted the scope of application and related conclusions were verified. The research results are of guiding significance for the application of P + -N-N + power diodes and the reliability of the corresponding circuit system.