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:
Feb. 06, 2007
Filed:
Apr. 21, 2006
Ke-horng Chen, Taipei, TW;
Chien-fang Peng, Taipei, TW;
Shih-min Chen, Hsinchu, TW;
Ming-tan Hsu, Miaoli, TW;
Ke-Horng Chen, Taipei, TW;
Chien-Fang Peng, Taipei, TW;
Shih-Min Chen, Hsinchu, TW;
Ming-Tan Hsu, Miaoli, TW;
Chunghwa Picture Tubes, Ltd., Taipei, TW;
Abstract
A boost DC/DC converter, including a mask circuit, a switched boost circuit, a pulse width modulation (PWM) circuit and an AND gate, is provided. The mask circuit is used to output a mask signal according to a load current. In the present invention, the system can selectively operate in the pulse width modulation mode, the pulse frequency modulation (PFM) mode or the mixed pulse mask mode according to the mask signal corresponding to the load current when the system is under light load, medium load or heavy load respectively, so as to achieve optimal system efficiency.