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:
Jul. 23, 2002
Filed:
Mar. 06, 2001
Applicant:
Inventor:
Scott Richard Burton, Ottawa, CA;
Assignee:
Mitel Knowledge Corporation, Kanata, CA;
Primary Examiner:
Int. Cl.
CPC ...
H02M 3/335 ; H02J 1/10 ;
U.S. Cl.
CPC ...
H02M 3/335 ; H02J 1/10 ;
Abstract
The present invention is a switching power supply having efficient light load regulation at high input voltage. The power supply comprises a pulse-width modulator integrated circuit along with two separate voltage buses. A transformer is connected to the first voltage bus via a first primary winding and is connected to the second voltage bus via a second primary winding both primary windings have a predetermined number of turns proportional to voltages supplied by the two voltage buses. The power supply further comprises a pair of switches connected to the two primary windings and driven by the integrated circuit.