US Patent 7378884 MOSFET for synchronous rectification

Patent 7378884 was granted and assigned to Alpha & Omega Semiconductor on May, 2008 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Alpha & Omega Semiconductor

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7378884

Date of Patent

May 27, 2008

Patent Application Number

11804877

Date Filed

May 21, 2007

Patent Primary Examiner

‌

Jeffrey S Zweizig

Patent abstract

This invention discloses a new MOSFET device. The MOSFET device has an improved operation characteristic achieved by connecting a shunt FET of low impedance to the MOSFET device. The shunt FET is to shunt a transient current therethrough. The shunt FET is employed for preventing an inadvertent turning on of the MOSFET device. The inadvertent turning on of the MOSFET may occur when a large voltage transient occurs at the drain of the MOSFET device. By connecting the gate of the shunt FET to the drain of the MOSFET device, a low impedance path is provided at the right point of time during the circuit operation to shunt the current without requiring any external circuitry.