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:
Jan. 22, 2008
Filed:
Oct. 31, 2005
George L. Cebry, Glendale, AZ (US);
George L. Cebry, Glendale, AZ (US);
Honeywell International, Inc., Morristown, NJ (US);
Abstract
An apparatus () is provided for preventing cross conduction in a synchronous rectifier of a DC-DC converter (). The DC-DC converter has an input MOSFET switch () coupled to primary windings () of an isolation transformer (), an output MOSFET switch () coupled to secondary windings () of the isolation transformer, and a complementary output MOSFET switch () coupled to an output terminal (). A synchronous rectifier timing circuit () comprises a first timing output signal circuit () responsive to a pulse width modulated signal for providing first and second timing output signals () that switches low at time tand high at time tto control the input MOSFET switch and output MOSFET switch, respectively, and a second timing output signal circuit () responsive to the pulse width modulated signal for providing a third timing output signal () that switches high at time tand low at time tto control the complementary output MOSFET switch.