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. 27, 1990
Filed:
Feb. 21, 1989
Kazuo Kobayashi, Kawasaki, JP;
Hiroo Tanaka, Kawasaki, JP;
Fumiaki Ihara, Tokyo-To, JP;
Katsuyuki Asahi, Machida, JP;
Osamu Kinoshita, Yokohama, JP;
Fujitsu Denso Ltd., Kanagawa, JP;
Abstract
A current-balance switching regulator in which a plurality of switching power source portions are connected in parallel for the purpose of supplying a stabilized output voltage to a load. Each of the switching power source portions includes a switching control portion for controlling a switching element connected to the primary side of a transformer in accordance with the output voltage on the secondary side of the transformer. Current is detected on the primary side of the portions. When a current unbalance is detected, current balance is arranged by adding the amount of unbalance equally among the portions, so concentration of the load to a particular portion can be prevented. As a result of such averaging, the life of each portion can be lengthened. The portions are connected so that one is made a master and the rest are slaves, so the output voltage can be determined by a variable resistor or the like. A limiter is provided to limit the amount of unbalance added, and an integrator is provided so the amount of unbalance added is smooth so that operation is stabilized.