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:
Oct. 22, 2013
Filed:
Dec. 10, 2010
Hengchun Mao, Plano, TX (US);
Dianbo Fu, Richardson, TX (US);
Zhaozheng Hou, Shenzhen, CN;
Xujun Liu, Shenzhen, CN;
Bing Cai, Richardson, TX (US);
Hengchun Mao, Plano, TX (US);
Dianbo Fu, Richardson, TX (US);
Zhaozheng Hou, Shenzhen, CN;
Xujun Liu, Shenzhen, CN;
Bing Cai, Richardson, TX (US);
Futurewei Technologies, Inc., Plano, TX (US);
Abstract
A soft switching apparatus comprises an energy recovery channel formed by two diodes in series connection and a resonant tank formed by an inductor and a capacitor. The soft switching apparatus is coupled to the primary side of a bridge converter. An energy transfer process during L-C resonance helps to reduce the amplitude of the current flowing through the inductor in a freewheeling period. Furthermore, the soft switching apparatus can help to reduce the voltage stress across the secondary switching devices as well as the shoot-through currents flowing through the secondary switching devices, and thus enabling the reduction or elimination of dead time in a secondary synchronous rectifier control scheme.