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:
Dec. 10, 2013
Filed:
Aug. 12, 2012
Jia-qi Dong, Shenzhen, CN;
Ji-chao LI, Shenzhen, CN;
Dan-dan Liu, Shenzhen, CN;
Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Shenzhen, CN;
Hon Hai Precision Industry Co., Ltd., New Taipei, TW;
Abstract
A control circuit includes a power controller, a comparator, and first to fifth electronic switches. When an electronic device is operating with light load, a voltage received by the inverting terminal of the comparator is less than a voltage received by the non-inverting terminal of the comparator, such that the first and fourth electronic switches are turned on, and the second, third, and fifth electronic switches are turned off. A first power supply is output to the switching power supply. When the electronic device is operating with heavy load, the voltage received by the inverting terminal of the comparator is greater than the voltage received by the non-inverting terminal of the comparator, such that the first and fourth electronic switches are turned off, and the second, third, and fifth electronic switches are turned on. A second power supply is output to the switching power supply.