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:
Sep. 07, 2010
Filed:
Mar. 28, 2007
Tae-kwon NA, Seoul, KR;
Doo-hyo Moon, Suwon-si, KR;
Tae-kwon Na, Seoul, KR;
Doo-hyo Moon, Suwon-si, KR;
Samsung Electronics Co., Ltd., Suwon-Si, KR;
Abstract
A switching mode power supply (SMPS) device includes a power converting part that converts an input voltage into an output voltage according to a switching signal, and outputs a primitive switching signal for use in varying a frequency of the switching signal based on power drawn by a load receiving the output voltage; a resonant circuit that changes a duty ratio of the primitive switching signal using a variable resonant frequency in accordance with a variance of an impedance of the load; and a signal controlling part that compares a voltage of the primitive switching signal, resonated in accordance with the variable resonant frequency, with a reference voltage, and varies the frequency of the switching signal and outputs the switching signal having the varied frequency when the voltage of the primitive switching signal is maintained below the reference voltage for longer than a reference time.