Search

This letter presents a partial-bootstrap gate driver circuit for switching loss reduction and crosstalk mitigation. The proposed circuit is simple and no additional power supply or control is needed. The circuit structure and operating principles of the proposed gate driver are introduced. Three different operating modes of the proposed gate driver are presented. Finally, the experimental results are presented to validate the proposed gate driver. It is found that the proposed gate driver can greatly accelerate the switching process and reduce switching loss. The proposed gate driver can also generate a gradually decaying negative voltage during the turn-off process to suppress crosstalk. [ABSTRACT FROM AUTHOR]

This article presents quick analytical prediction methods of switching loss, turn-on/off overvoltage, di/dt, and dv/dt for SiC metal–oxide–semiconductor field-effect transistor based on device datasheet. First, the switching process is analyzed and the simplification principles are discussed based on charge conservation and flux conservation. Second, the analytical equations of switching loss, turn-on/off overvoltage, di/dt, and dv/dt are derived. Third, experimental results under different operating conditions are presented to validate the proposed methods. It is found that the average prediction error is 10.11%. Finally, relationships between switching performance and different parameters, such as parasitic capacitance, parasitic inductance, dc-voltage, and load current, are analyzed and summarized based on the proposed prediction methods. [ABSTRACT FROM AUTHOR]