Power mosfet transistor circuit with active clamp

Details Power mosfet transistor circuit with active clamp Power mosfet transistor circuit with active clamp

H - Electricity

01

L

H01L 29/788 (2006.01) H01L 27/02 (2006.01) H02H 9/02 (2006.01) H02H 9/04 (2006.01)

Patent

CA 2054675

29MT00016 ABSTRACT OF THE INVENTION A power MOS transistor, including source, drain, and gate electrodes, comprises a substrate of a semiconductor material of one conductivity type having first and second opposed surfaces; a drain region extending through the substrate between the surfaces; a plurality of spaced body regions of the opposite conductivity type extending into the substrate from the first surface; and a source region of the one conductivity type extending into the substrate from the first surface within each of the body regions, the interface of each of the source regions with its respective body region at the first surface being spaced from the interface of its respective body region and the drain region at the first surface to form a channel region therebetween. A gate electrode overlies and is insulated from the first surface and extends across the channel regions. A conductive electrode extends over and is insulated from the gate electrode, and contacts at least a portion of the source regions. A current limiting circuit is coupled between the conductive electrode and the gate electrode and a voltage limiting circuit is coupled between the drain electrode and the gate electrode.

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