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:
Feb. 04, 2014
Filed:
Dec. 17, 2009
Makoto Sato, Niiza, JP;
Yoichi Kyono, Niiza, JP;
Makoto Sato, Niiza, JP;
Yoichi Kyono, Niiza, JP;
Sanken Electric Co., Ltd., Niiza-Shi, Saitama, JP;
Abstract
In conventional multi-output switching power supply device, power is supplied from a relatively high voltage side output to a relatively low voltage side output through a dropper circuit which generates relatively large power loss so as to improve the voltage accuracy of a non-stabilized output, so that power supply efficiency is low and heat generated from the dropper circuit is high. One DC power supply of a plurality of DC power supplies on the secondary side is a stabilized output (24 V output terminal TM) having a voltage stabilizing means for stabilizing the output voltage by feeding back the output voltage to a primary side control circuit, and the rest of the DC power supplies are non-stabilized outputs (12 V output terminals TM) not having a voltage stabilizing means for feeding back the output voltage to the primary side. A step-up/down converter is provided between the output of the non-stabilized output and the output of the stabilized output and power is applied/received between the outputs in accordance with the non-stabilized output voltage and, thus, the voltage accuracy of the non-stabilized output is improved.