Patent ID: 7274243
Filing Date: 2007-09-25
Classification: H02M,H03K

Abstract:
1. A circuit for operating a semiconductor switching device having a gate and having a turn-on behavior and a turn-off behavior, the circuit comprising: control circuitry providing signals for operating the switching device, the control circuitry receiving an operating condition of the switching device and having a plurality of operating points of the switching device stored in the control circuitry, each operating point associated with a corresponding control signal for the switching device; power circuitry coupled between the control circuitry and the switching device, the power circuitry including a desaturation detector, receiving the control signals from the control circuitry and providing drive signals to the gate of the switching device to operate the switching device based on the control signal; wherein the control circuitry compares the operating condition measured from the switching device to the plurality of operating points stored in the control circuitry and sends the corresponding control signal to the power circuitry, and wherein the power circuitry receives the corresponding control signal from the control circuitry and provides a drive signal to the gate of the switching device to control the turn-on or turn-off behavior of the switching device based on the measured operating conditions.