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dc.date.accessioned2016-08-24T17:55:14Zen
dc.date.available2016-08-24T17:55:14Zen
dc.date.issued2013-12-03en
dc.identifier.urihttp://hdl.handle.net/10919/72710en
dc.description.abstractA multi-channel circuit having respective channels powered through transformers having primary windings connected in series allows substantially equal constant currents to be provided through all channels by cross-regulation while only a single channel need be monitored and controlled. The variation in current between channels is generally small and largely insensitive to imbalances between voltages on loads due, for example, to different numbers of LEDs in series connected strings in illumination devices and can be further reduced by inverse coupling between inductors in respective channels. Efficiency is improved through reduction in the number of stages of the constant current source since the respective channels provided both DC-to-DC conversion and constant current regulation.en
dc.format.mimetypeapplication/pdfen
dc.language.isoen_USen
dc.publisherUnited States Patent and Trademark Officeen
dc.titleMulti-channel constant current source and illumination sourceen
dc.typePatenten
dc.identifier.urlhttp://pimg-fpiw.uspto.gov/fdd/07/988/085/0.pdfen
dc.date.accessed2016-08-19en
dc.type.dcmitypeTexten
dc.contributor.assigneeVirginia Tech Intellectual Properties, Inc.en
dc.contributor.inventorLee, Fred C.en
dc.contributor.inventorJi, Shuen
dc.contributor.inventorWu, Haoranen
dc.date.filed2011-05-24en
dc.identifier.applicationnumber13114181en
dc.subject.uspc315/294en
dc.subject.uspcother315/200Ren
dc.subject.uspcother315/220en
dc.subject.uspcother315/312en
dc.subject.cpcH05B33/0815en
dc.subject.cpcH05B33/0851en
dc.subject.cpcY02B20/347en
dc.type.patenttypeutilityen
dc.identifier.patentnumber8598807en


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