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. 06, 2013
Filed:
Feb. 05, 2010
Kaiwei Yao, San Jose, CA (US);
Zheng Luo, Santa Clara, CA (US);
Kaiwei Yao, San Jose, CA (US);
Zheng Luo, Santa Clara, CA (US);
Monolithic Power Systems, Inc., San Jose, CA (US);
Abstract
The present invention discloses a step up circuit with output floating for driving a load such as a LED or a series of LEDs in a string. The step up circuit comprises an input port, an output port, an inductor, an input capacitor, an output capacitor, a first switch, a second switch and a third switch. The third switch Sis an additional switch for purpose of high dimming ratio control, short circuit protection and input disconnection realization. Further, the third switch can implement an additional LDO function when the voltage at the input port is larger than the voltage across the load.