The Quantitative Relationships Between Mismatched Parameters and Dynamic Imbalanced Current During IGBT Turn-on

The parameter mismatch has a great influence on dynamic current imbalanced for parallel IGBT. Now, high voltage IGBT physical models are difficult to obtain, so there is no quantitative relationship between mismatched parameters and dynamic imbalanced current. Therefore, the dynamic imbalanced current cannot be accurately evaluated. This paper analyzes the internal mechanism of dynamic current imbalanced, and puts forward that parameter mismatch affects dynamic current imbalanced mainly by making MOS current different in terms of high voltage IGBT. Finally, the quantitative relationships are established between the mismatched parameters and dynamic imbalanced current during turn-on, and verified by IGBT physical model simulation.