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:
Apr. 06, 2004
Filed:
Aug. 16, 2002
TDK Corporation, Tokyo, JP;
Abstract
The switching power supply comprises a main circuit having a switching circuit for converting a DC input voltage to an AC voltage and an output circuit for rectifying the AC voltage to generate a DC output voltage, a control circuit for controlling the operation of the main circuit, and an abrupt load change detector circuit for detecting an abrupt change in the load current supplied from the main circuit, characterized in that the abrupt load change detector circuit comprises a first filter and a second filter for receiving the output voltage and detection signal generating means for generating an abrupt load change detection signal based on the outputs of the first filter and the second filter. This eliminates a power loss or operation delay caused when a resistor or a current transformer is used to directly detect the output current. Proper use of an abrupt load change detection signal allows dramatic improvement in transient response.