The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 06, 2011
Filed:
Mar. 19, 2008
Kouhei Yamada, Matsumoto, JP;
Kouhei Yamada, Matsumoto, JP;
Fuji Electric Systems Co., Ltd., Tokyo, JP;
Abstract
An overcurrent detection circuit (in FIG.) in a DC-DC converter is connected to a switching control circuit (), and detects an inductor current flowing through an inductor (L) during the ON control of a switching element (Mn), so as to decide whether the inductor current has decreased down to a prescribed value. The switching control circuit () alters the switching timing of a control signal to extend the OFF state of a switching element (Mp) until the decrease of the inductor current to a predetermined magnitude is decided by the overcurrent detection circuit (). Even when a delay is involved in an overcurrent detection operation, the DC-DC converter is still capable of overcurrent limitation.