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. 01, 2002
Filed:
Jan. 27, 2001
Richard W. Farrington, Heath, TX (US);
Claes Svardsjo, Richardson, TX (US);
William Hart, Plano, TX (US);
Ericsson, Inc., Richardson, TX (US);
Abstract
The present invention provides a method for preventing a fault condition in a DC-DC converter ( ) having a first secondary winding (Ns ) coupled to a first synchronous rectifier (SQ ) and a second secondary winding (Ns ) coupled to a second synchronous rectifier (SQ ). The first synchronous rectifier (SQ ) is turned on based on a voltage across the first secondary winding (Ns ) and is turned off based on a first driver signal. The second synchronous rectifier (SQ ) is turned on based on a voltage across the second secondary winding (Ns ) and is turned off based on a second driver signal. The present invention also provides a DC-DC converter ( ) wherein a first control circuit is coupled to and controls the first synchronous rectifier (SQ ) pursuant to the method described above, and a second control circuit is coupled to and controls the second synchronous rectifier (SQ ) pursuant to the method described above.