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:
Jul. 06, 2010
Filed:
Apr. 20, 2006
Masaki Omi, Kyoto, JP;
Masaki Omi, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
A switching power supply IC () is provided with, in a form integrated into an integrated circuit: a terminal (T) whereupon an input voltage (Vin) is applied through an inductor (Lex); a terminal (T) from which an output voltage (Vout) for a loading LED is extracted; a transistor (N) connected between the terminal (T) and a grounding end; a transistor (P) connected between the terminal (T) and the terminal (T); a transistor (P) connected between the terminal (T) and a backgate of the transistor (P); and a switching control section (CTRL) for performing switching control to each transistor. During a step-up operation, the switching control section (CTRL) controls the switching of the transistors (N, P) complementarily to each other while continuously keeping the transistor (P) on, and turns off all of the transistors (N, P, P) when a step-up operation is stopped.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile