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:
Nov. 16, 2004
Filed:
Sep. 12, 2002
Yutaka Ishihara, Tokyo, JP;
Toru Takahashi, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
The present invention relates to a switching power supply apparatus equipped with an over-temperature protection circuit that operates appropriately even when a problem occurs in the control circuit. A switching conversion circuit has a switching element turned on and off according to a drive signal S supplied from a drive circuit , converts the voltage supplied via a input circuit to switching output, and outputs that switching output. An output circuit is supplied with the switching output, adjusts the supplied switching output to a prescribed output, and outputs that prescribed output. A control circuit supplies a control signal S to the drive circuit . An over-temperature protection circuit comprises a temperature detector and a switch , and is connected to the control electrode of the switching element , and cuts off the drive signal S via the switch when the temperature detector detects an abnormal temperature in the switching power supply apparatus.