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:
Mar. 14, 2000
Filed:
Jun. 13, 1997
Computer Products, Incorporated, Fremont, CA (US);
Abstract
An AC-to-DC power converter (power supply) with high power factors and which minimizes the input charging current flowing through the separate inductor by locating the separate inductor between a full-bridge rectifier and the transformer but out of the storage capacitor's current path. In this manner, when the input voltage is sufficiently high, the converter draws input current into the transformer through the separate inductor, while current flowing to and charging the storage capacitor is unimpeded by the separate inductor. The current being drawn through the separate inductor and into the transformer may also be used to recharge the storage capacitor. Associated losses are reduced and the separate inductor may be reduced in size. Other embodiments eliminate the second primary winding in the transformer and place a second set of windings coupled to the separate inductor between the full-bridge rectifier and the storage capacitor, which reduces the current spike when the storage capacitor is recharged with current flowing through this path.