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dc.date.accessioned2016-08-24T17:54:35Z
dc.date.available2016-08-24T17:54:35Z
dc.date.issued2006-07-04
dc.identifier.urihttp://hdl.handle.net/10919/72533
dc.description.abstractA two-stage power converter that dynamically adjusts to output current requirements includes a first stage regulator that provides power to a second stage regulator. The first stage can be a buck converter, and the second stage can be a multiple-phase buck converter. The output voltage of the first stage (intermediate bus voltage Vbus) is varied according to the load current to optimize conversion efficiency. To provide maximum efficiency, the Vbus voltage is increased as load current increases. The Vbus voltage provided by the first stage can be varied by duty cycle or operating frequency control. In another embodiment, the switching frequency of the second stage is varied as output current changes so that output current ripple is held constant. In an embodiment employing a multiple-phase buck converter in the second stage, the number of operating phases are varied as output current changes.
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen_US
dc.publisherUnited States Patent and Trademark Office
dc.titleTwo-stage voltage regulators with adjustable intermediate bus voltage, adjustable switching frequency, and adjustable number of active phases
dc.typePatent
dc.identifier.urlhttp://pimg-fpiw.uspto.gov/fdd/60/716/070/0.pdf
dc.date.accessed2016-08-19
dc.type.dcmitypeText
dc.contributor.assigneeVirginia Tech Intellectual Properties, Inc.
dc.contributor.inventorLee, Fred C.
dc.contributor.inventorXu, Ming Gang
dc.contributor.inventorWei, Jia
dc.contributor.inventorRen, Yuancheng
dc.contributor.inventorZhou, Jinghai
dc.date.filed2004-12-22
dc.identifier.applicationnumber11018920
dc.subject.uspc323/266
dc.subject.uspcother323/272
dc.subject.uspcother323/282
dc.subject.uspcother323/284
dc.subject.cpcH02M3/156
dc.subject.cpcH02M2001/0019
dc.subject.cpcH02M2001/0032
dc.subject.cpcH02M2001/007
dc.subject.cpcY02B70/16
dc.type.patenttypeutility
dc.identifier.patentnumber7071660


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