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Article: Topology-Transition Control For Wide-Input-Voltage-Range Efficiency Improvement and Fast Current Regulation in Automotive LED Applications

TitleTopology-Transition Control For Wide-Input-Voltage-Range Efficiency Improvement and Fast Current Regulation in Automotive LED Applications
Authors
Issue Date2017
PublisherIEEE. The Journal's web site is located at http://www.ewh.ieee.org/soc/ies/ties/index.html
Citation
IEEE Transactions on Industrial Electronics, 2017, v. 64, p. 5883-5893 How to Cite?
AbstractAutomotive light-emitting-diode (LED) drivers require special design considerations, which includes voltage step-up and step-down function, high energy efficiency, and fast current reference tracking capability. Unlike the conventional efficiency improvement methods, which is based on cumbersome circuit/component optimization and/or modification for a single operating point, this paper proposes a simple approach based on topology transition which can achieve a high efficiency for a wide input voltage range. In particular, the topology of the LED driver can change between buck, boost, and buck-boost converter according to the level of the input voltage. In addition, a novel current mode controller is proposed, such that 1) compatibility to different topologies, 2) seamless topology transition, and 3) fast current reference tracking can be concurrently achieved. The feasibilities of the proposed topology transition method and its control has been experimentally verified through a four-switch buck-boost converter prototype with 7-45 V input, 25 V/1 A LED strings output. It is shown that there is more than 5% efficiency improvement as compared to the conventional four-switch buck-boost converter. Full range (0%-100%) and precise (1% dimming precision) pulse-width-modulated dimming has also been demonstrated.
Persistent Identifierhttp://hdl.handle.net/10722/244955
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorQIN, Y-
dc.contributor.authorLi, S-
dc.contributor.authorHui, SYR-
dc.date.accessioned2017-09-18T02:02:04Z-
dc.date.available2017-09-18T02:02:04Z-
dc.date.issued2017-
dc.identifier.citationIEEE Transactions on Industrial Electronics, 2017, v. 64, p. 5883-5893-
dc.identifier.urihttp://hdl.handle.net/10722/244955-
dc.description.abstractAutomotive light-emitting-diode (LED) drivers require special design considerations, which includes voltage step-up and step-down function, high energy efficiency, and fast current reference tracking capability. Unlike the conventional efficiency improvement methods, which is based on cumbersome circuit/component optimization and/or modification for a single operating point, this paper proposes a simple approach based on topology transition which can achieve a high efficiency for a wide input voltage range. In particular, the topology of the LED driver can change between buck, boost, and buck-boost converter according to the level of the input voltage. In addition, a novel current mode controller is proposed, such that 1) compatibility to different topologies, 2) seamless topology transition, and 3) fast current reference tracking can be concurrently achieved. The feasibilities of the proposed topology transition method and its control has been experimentally verified through a four-switch buck-boost converter prototype with 7-45 V input, 25 V/1 A LED strings output. It is shown that there is more than 5% efficiency improvement as compared to the conventional four-switch buck-boost converter. Full range (0%-100%) and precise (1% dimming precision) pulse-width-modulated dimming has also been demonstrated.-
dc.languageeng-
dc.publisherIEEE. The Journal's web site is located at http://www.ewh.ieee.org/soc/ies/ties/index.html-
dc.relation.ispartofIEEE Transactions on Industrial Electronics-
dc.rightsIEEE Transactions on Industrial Electronics. Copyright © IEEE.-
dc.rights©20xx IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. -
dc.titleTopology-Transition Control For Wide-Input-Voltage-Range Efficiency Improvement and Fast Current Regulation in Automotive LED Applications-
dc.typeArticle-
dc.identifier.emailLi, S: snli@eee.hku.hk-
dc.identifier.emailHui, SYR: ronhui@eee.hku.hk-
dc.identifier.authorityHui, SYR=rp01510-
dc.identifier.doi10.1109/TIE.2017.2686304-
dc.identifier.hkuros276697-
dc.identifier.volume64-
dc.identifier.spage5883-
dc.identifier.epage5893-
dc.identifier.isiWOS:000403011200065-

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