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:
Aug. 19, 2014
Filed:
Apr. 10, 2012
Zhimou Ren, Chengdu, CN;
Ching-chuan Kuo, Taipei, TW;
Jianlong Gao, Chengdu, CN;
Xinmin Yi, Chengdu, CN;
Yunning Xie, Chengdu, CN;
Zhimou Ren, Chengdu, CN;
Ching-Chuan Kuo, Taipei, TW;
Jianlong Gao, Chengdu, CN;
Xinmin Yi, Chengdu, CN;
Yunning Xie, Chengdu, CN;
02Micro, Inc., Santa Clara, CA (US);
Abstract
A circuit includes a transformer and a controller. The transformer includes a primary winding and a secondary winding, and operates in multiple switching cycles. A switching cycle includes a charging period and a discharging period. During the charging period, the transformer is powered by the input voltage and a current flowing through the primary winding increases. During the discharging period the transformer discharges to power the load and a current flowing through the secondary winding decreases. The controller includes a pin that receives a first feedback signal indicating the input voltage during the charging period and receives a second feedback signal indicating an electrical condition of the secondary winding during the discharging period. The controller generates a first control signal and a second control signal to regulate the input voltage and an output current flowing through the load, respectively.