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. 21, 2012
Filed:
Nov. 18, 2008
Yuan-wen Chang, Hsin-Chu, TW;
Chun-teh Chen, Hsin-Chu, TW;
Ren-yi Chen, Hsin-Chu, TW;
Yi-shan Chu, Hsin-Chu, TW;
Yuan-Wen Chang, Hsin-Chu, TW;
Chun-Teh Chen, Hsin-Chu, TW;
Ren-Yi Chen, Hsin-Chu, TW;
Yi-Shan Chu, Hsin-Chu, TW;
Leadtrend Technology Corp., Science-Based Industrial Park, Hsin-Chu, TW;
Abstract
A control circuit for use in a power converter has a multi-function terminal, a current comparator circuit, and an under-voltage detection circuit. The current comparator circuit compares current flowing through a power switch of the power converter with a reference value through the multi-function terminal when the power switch is on, and turns the power switch off when the current reaches the reference value. The under-voltage detection circuit determines whether an input voltage of the power converter is less than a predetermined value through the multi-function terminal when the power switch is turned off.