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:
Aug. 17, 1999
Filed:
Jan. 31, 1997
Hiroto Tanaka, Kariya, JP;
Kabushiki Kaisha Toyoda Jidoshokki Seisakusho, Aichi, JP;
Abstract
A switching element is controlled by a control circuit. When the switching element is in an ON state, a coil current I.sub.L ramps up. When the switching element is in an OFF state, the coil current I.sub.L ramps down. If an output voltage V.sub.out is smaller than a predetermined output voltage value, a control circuit is informed of it. If the coil current I.sub.L rises to a peak current I.sub.LP set by a setting circuit, the control circuit is informed of it. The setting circuit sets the peak current I.sub.LP proportional to an input voltage V.sub.in. The control circuit sets the switching element in the ON state when the output voltage V.sub.out is smaller than the predetermined output voltage value, and sets the switching element in the OFF state when the coil current I.sub.L rises to the peak current I.sub.LP.