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:
May. 20, 2014
Filed:
Jan. 24, 2012
Michiyasu Deguchi, Chiba, JP;
Michiyasu Deguchi, Chiba, JP;
Seiko Instruments Inc., Chiba, JP;
Abstract
Provided is a switching regulator including an overload protection circuit, which has high accuracy even without requiring adjusting means in a test step. The switching regulator includes: a first triangle wave generation circuit for generating a first triangle wave which controls Duty of a PWM signal; and a second triangle wave generation circuit for generating a second triangle wave for overload detection, which has a crest value smaller than that of the first triangle wave. A ratio between the crest value of the first triangle wave and the crest value of the second triangle wave is set based on respective capacitances or constant currents thereof.