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. 30, 2007
Filed:
Jul. 16, 2004
Eugene Andrei Trandafir, Port Moody, CA;
Jerome Ronne, Burnaby, CA;
Minjie Shi, Burnaby, CA;
Rasvan Catalin Mihai, Vancouver, CA;
Eugene Andrei Trandafir, Port Moody, CA;
Jerome Ronne, Burnaby, CA;
Minjie Shi, Burnaby, CA;
Rasvan Catalin Mihai, Vancouver, CA;
Cellex Power Products, Inc., Richmond, B.C., CA;
Abstract
A method and apparatus for digitally controlling the average input current of a switch mode power supply are disclosed. In preferred embodiments, the switch mode power supplies are DC-DC converters. One aspect of the invention relates to a method for controlling the switch of a switch mode power supply by digitally sampling the input current once during each power supply switching cycle at a time that is synchronized with the switching cycle. The predetermined time at which the input current is sampled may be midway through the time that the switch is in the 'ON' state. This midway time may also be delayed slightly to compensate for delays associated with the switch.