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:
Jun. 26, 2007
Filed:
Mar. 03, 2004
Tetsushi Otake, Tsurugashima, JP;
Tetsushi Otake, Tsurugashima, JP;
Toko, Inc., Tokyo, JP;
Abstract
Disclosed is a switching constant-current power supply system, comprising a feedback circuitprovided between a detector circuitfor generating a first feedback signal in proportion to a current flowing in a load, and a control circuitfor driving a first power converter circuitwhich is provided on the input side of a second power converter circuitto stabilize the load current. The feedback circuitincludes a signal hold sectionfor generating a second feedback signal. The feedback circuitis operable to supply the first feedback signal to the control circuitin a current supply period, and to supply the second feedback signal to the control circuitin a current cutoff period. The second feedback signal has a signal value approximately equal to that of the first feedback signal appearing in the current supply period. The switching constant-current power supply system can stabilize the load current even under the condition that the load is repeatedly turned on/off.