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. 16, 2013
Filed:
Mar. 26, 2010
Hyun June Kim, Daejeon, KR;
Dae Young Youn, Daejeon, KR;
Hyun Soo Park, Daejeon, KR;
Sang Min Kim, Daejeon, KR;
Hyo Nam Kim, Daejeon, KR;
Hyun June Kim, Daejeon, KR;
Dae Young Youn, Daejeon, KR;
Hyun Soo Park, Daejeon, KR;
Sang Min Kim, Daejeon, KR;
Hyo Nam Kim, Daejeon, KR;
Smart Power Solutions, Inc., Daejon, KR;
Abstract
A switching mode power supply (SNIPS) includes a rectifying unit transforming AC power input from outside to DC power, a main transformer transforming and outputting the rectified DC power, a pulse width modulation control unit controlling output voltage by applying a pulse signal to a primary winding of the main transformer, and a feedback control unit controlling an output signal of the pulse width modulation control unit by detecting output voltage of the main transformer, including: a first state transform unit, including: a second photo diode; and a second photo transistor included between an AC power input unit and the pulse width modulation control unit to form a photo coupler with the second photo diode, and a second state transform unit, including: a comparator connected to a secondary winding of the main transformer to apply the output voltage and reference voltage to an inverting terminal and a noninverting terminal, and compare the output voltage with the reference voltage and output the voltage through an output terminal.