초록 ▼

A driver circuit for a semiconductor power switch. The driver circuit supplies a high voltage pulse to the gate of an IGBT. The driver circuit also monitors the voltage on the collector of the IGBT with respect to the emitter. If the voltage at the collector of the IGBT does not drop when the IQBT i

A driver circuit for a semiconductor power switch. The driver circuit supplies a high voltage pulse to the gate of an IGBT. The driver circuit also monitors the voltage on the collector of the IGBT with respect to the emitter. If the voltage at the collector of the IGBT does not drop when the IQBT is turned on, the IGBT driver circuit detects a short circuit and triggers a linear integrator within the driver circuit. The linear integrator gently ramps down the voltage on the gate of the IGBT.

대표청구항 ▼

[ What is claimed is:] [1.] A switch driver circuit for driving a switch having a control terminal and a switchable current path, the driver circuit comprising:means, connected to the control terminal, for supplying a voltage to the control terminal;means, connected to the switchable current path fo

[ What is claimed is:] [1.] A switch driver circuit for driving a switch having a control terminal and a switchable current path, the driver circuit comprising:means, connected to the control terminal, for supplying a voltage to the control terminal;means, connected to the switchable current path for detecting a short circuit condition; andmeans, responsive only to a detected short circuit condition, for linearly ramping down the voltage on the control terminal and for preventing a large voltage spike across the switchable current path.