P-52: A New Dynamic Headroom Controller using Storage Delay Time of BJT for Low Power Consumption of LED Backlight
A new dynamic headroom control circuit for PWM LED drivers was proposed. Unlike conventional headroom control circuits, the proposed circuit uses storage delay time of BJTs. During off periods of the PWM driver, the proposed circuit senses the storage delay time from the base of BJT and minimizes th...
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| Veröffentlicht in: | SID International Symposium Digest of technical papers 2014-06, Vol.45 (1), p.1168-1171 |
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| container_title | SID International Symposium Digest of technical papers |
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| creator | Huh, Jin Jung, Sang-Duk Cho, Gyu-Heong |
| description | A new dynamic headroom control circuit for PWM LED drivers was proposed. Unlike conventional headroom control circuits, the proposed circuit uses storage delay time of BJTs. During off periods of the PWM driver, the proposed circuit senses the storage delay time from the base of BJT and minimizes the error between the sensed time and a reference delay time by adjusting the converter output voltage consecutively. A reverse recovery time of KTC4380 that determined by storage delay time and rising time was measured for different values of the VCE. Based on the measurement results, a reference pulse width was determined. By applying the reference determined, the proposed circuit was simulated by LTspice for verification and the simulation results showed that the proposed circuit well controlled the headroom voltage of the current source. Hence, the low power consumption could be achieved. |
| doi_str_mv | 10.1002/j.2168-0159.2014.tb00304.x |
| format | Article |
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Unlike conventional headroom control circuits, the proposed circuit uses storage delay time of BJTs. During off periods of the PWM driver, the proposed circuit senses the storage delay time from the base of BJT and minimizes the error between the sensed time and a reference delay time by adjusting the converter output voltage consecutively. A reverse recovery time of KTC4380 that determined by storage delay time and rising time was measured for different values of the VCE. Based on the measurement results, a reference pulse width was determined. By applying the reference determined, the proposed circuit was simulated by LTspice for verification and the simulation results showed that the proposed circuit well controlled the headroom voltage of the current source. Hence, the low power consumption could be achieved.</description><identifier>ISSN: 0097-966X</identifier><identifier>EISSN: 2168-0159</identifier><identifier>DOI: 10.1002/j.2168-0159.2014.tb00304.x</identifier><language>eng</language><publisher>Campbell: Blackwell Publishing Ltd</publisher><subject>Circuits ; Consumption ; Delay ; dynamic headroom control ; Dynamics ; Electric potential ; LED driver ; low power consumption ; Power consumption ; Pulse duration modulation ; Simulation ; storage delay time of BJT ; Voltage</subject><ispartof>SID International Symposium Digest of technical papers, 2014-06, Vol.45 (1), p.1168-1171</ispartof><rights>2014 Society for Information Display</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c2084-6a03a27bc57845efcd7399a82c22bc6c57f00c25a61f507a7c746f2c01a649673</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1002%2Fj.2168-0159.2014.tb00304.x$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2Fj.2168-0159.2014.tb00304.x$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>315,781,785,1418,27928,27929,45578,45579</link.rule.ids></links><search><creatorcontrib>Huh, Jin</creatorcontrib><creatorcontrib>Jung, Sang-Duk</creatorcontrib><creatorcontrib>Cho, Gyu-Heong</creatorcontrib><title>P-52: A New Dynamic Headroom Controller using Storage Delay Time of BJT for Low Power Consumption of LED Backlight</title><title>SID International Symposium Digest of technical papers</title><addtitle>SID Symposium Digest of Technical Papers</addtitle><description>A new dynamic headroom control circuit for PWM LED drivers was proposed. Unlike conventional headroom control circuits, the proposed circuit uses storage delay time of BJTs. During off periods of the PWM driver, the proposed circuit senses the storage delay time from the base of BJT and minimizes the error between the sensed time and a reference delay time by adjusting the converter output voltage consecutively. A reverse recovery time of KTC4380 that determined by storage delay time and rising time was measured for different values of the VCE. Based on the measurement results, a reference pulse width was determined. By applying the reference determined, the proposed circuit was simulated by LTspice for verification and the simulation results showed that the proposed circuit well controlled the headroom voltage of the current source. Hence, the low power consumption could be achieved.</description><subject>Circuits</subject><subject>Consumption</subject><subject>Delay</subject><subject>dynamic headroom control</subject><subject>Dynamics</subject><subject>Electric potential</subject><subject>LED driver</subject><subject>low power consumption</subject><subject>Power consumption</subject><subject>Pulse duration modulation</subject><subject>Simulation</subject><subject>storage delay time of BJT</subject><subject>Voltage</subject><issn>0097-966X</issn><issn>2168-0159</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><recordid>eNqVkV9v0zAUxS0EEmXwHSx44SXh2nHseG_9MzqmahS1wN4s13NKuiTu7ERtvz3OOu2BN55s2b9zdO85CH0kkBIA-mWXUsKLBEguUwqEpd0GIAOWHl-h0cvXazQCkCKRnN-9Re9C2EUoY0yOkF8mOb3EY3xrD3h2anVTGXxt9b13rsFT13be1bX1uA9Vu8Wrznm9tXhma33C66qx2JV4crPGpfN44Q546Q6RjsLQN_uucu0ALK5meKLNQ11t_3Tv0ZtS18F-eD4v0M-vV-vpdbL4Pv82HS8SQ6FgCdeQaSo2JhcFy21p7kUmpS6ooXRjeHwuAQzNNSdlDkILIxgvqQGiOZNcZBfo89l3791jb0OnmioYW9e6ta4PinAOIEAQGdFP_6A71_s2TheprGCCc8kidXmmjHcheFuqva8a7U-KgBrqUDs1ZK6GzNVQh3quQx2jeHwWH6ranv5DqVaz9fLpHj2Ss0cVOnt88dD-QcV9Ra5-387VSt6xXz_YRM2zv8kinzk</recordid><startdate>201406</startdate><enddate>201406</enddate><creator>Huh, Jin</creator><creator>Jung, Sang-Duk</creator><creator>Cho, Gyu-Heong</creator><general>Blackwell Publishing Ltd</general><general>Wiley Subscription Services, Inc</general><scope>BSCLL</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SC</scope><scope>7SP</scope><scope>8FD</scope><scope>JQ2</scope><scope>L7M</scope><scope>L~C</scope><scope>L~D</scope></search><sort><creationdate>201406</creationdate><title>P-52: A New Dynamic Headroom Controller using Storage Delay Time of BJT for Low Power Consumption of LED Backlight</title><author>Huh, Jin ; Jung, Sang-Duk ; Cho, Gyu-Heong</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c2084-6a03a27bc57845efcd7399a82c22bc6c57f00c25a61f507a7c746f2c01a649673</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2014</creationdate><topic>Circuits</topic><topic>Consumption</topic><topic>Delay</topic><topic>dynamic headroom control</topic><topic>Dynamics</topic><topic>Electric potential</topic><topic>LED driver</topic><topic>low power consumption</topic><topic>Power consumption</topic><topic>Pulse duration modulation</topic><topic>Simulation</topic><topic>storage delay time of BJT</topic><topic>Voltage</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Huh, Jin</creatorcontrib><creatorcontrib>Jung, Sang-Duk</creatorcontrib><creatorcontrib>Cho, Gyu-Heong</creatorcontrib><collection>Istex</collection><collection>CrossRef</collection><collection>Computer and Information Systems Abstracts</collection><collection>Electronics & Communications Abstracts</collection><collection>Technology Research Database</collection><collection>ProQuest Computer Science Collection</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Computer and Information Systems Abstracts Academic</collection><collection>Computer and Information Systems Abstracts Professional</collection><jtitle>SID International Symposium Digest of technical papers</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Huh, Jin</au><au>Jung, Sang-Duk</au><au>Cho, Gyu-Heong</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>P-52: A New Dynamic Headroom Controller using Storage Delay Time of BJT for Low Power Consumption of LED Backlight</atitle><jtitle>SID International Symposium Digest of technical papers</jtitle><addtitle>SID Symposium Digest of Technical Papers</addtitle><date>2014-06</date><risdate>2014</risdate><volume>45</volume><issue>1</issue><spage>1168</spage><epage>1171</epage><pages>1168-1171</pages><issn>0097-966X</issn><eissn>2168-0159</eissn><abstract>A new dynamic headroom control circuit for PWM LED drivers was proposed. Unlike conventional headroom control circuits, the proposed circuit uses storage delay time of BJTs. During off periods of the PWM driver, the proposed circuit senses the storage delay time from the base of BJT and minimizes the error between the sensed time and a reference delay time by adjusting the converter output voltage consecutively. A reverse recovery time of KTC4380 that determined by storage delay time and rising time was measured for different values of the VCE. Based on the measurement results, a reference pulse width was determined. By applying the reference determined, the proposed circuit was simulated by LTspice for verification and the simulation results showed that the proposed circuit well controlled the headroom voltage of the current source. Hence, the low power consumption could be achieved.</abstract><cop>Campbell</cop><pub>Blackwell Publishing Ltd</pub><doi>10.1002/j.2168-0159.2014.tb00304.x</doi><tpages>4</tpages></addata></record> |
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| subjects | Circuits Consumption Delay dynamic headroom control Dynamics Electric potential LED driver low power consumption Power consumption Pulse duration modulation Simulation storage delay time of BJT Voltage |
| title | P-52: A New Dynamic Headroom Controller using Storage Delay Time of BJT for Low Power Consumption of LED Backlight |
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