US Patent 7116563 Dual mode over-current protection for switching mode power converter

Patent 7116563 was granted and assigned to Semtech on October, 2006 by the United States Patent and Trademark Office.

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Patent

Patent attributes

Current Assignee

Semtech

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

71165630

Patent Inventor Names

Lei Hua0

Date of Patent

October 3, 2006

Patent Application Number

111339020

Date Filed

May 19, 2005

Patent Primary Examiner

‌

Bao Q. Vu

Patent abstract

A control circuit for a switched mode power converter is adapted to receive a current sense signal reflecting the output current of the power converter and a feedback signal reflecting the output voltage of the power converter. The control circuit includes a first over-current protection circuit adapted to shut off operation of the switched mode power converter if a sum of the current sense signal and the feedback signal exceed a first predetermined limit, and a second over-current protection circuit adapted to regulate operation of said primary side power switch responsive a comparison of the sum of the current sense signal and the feedback signal to a second predetermined limit. The second predetermined limit is less than the first predetermined limit.

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