白光二極管驅(qū)動電路的研究.pdf

1、西安電子科技大學(xué)碩士學(xué)位論文白光二極管驅(qū)動電路的研究姓名：崔慶申請學(xué)位級別：碩士專業(yè)：微電子學(xué)與固體電子學(xué)指導(dǎo)教師：張玉明20070101AbstmetAbstractWhiteLEDlightingsystemhasmanycharacteristic，forexamplelowpowerconsumptionlowpowersupplylongusagelife，energyconservationenvironmentalprot

2、ectionandsoonBecauseoftheseexcellences，researchofWhiteLEDDriveCircuithascrucialsignificanceoftheoryandvalueofapplicationThispaperworkondesigningachipusingtechnologyofchargepumpswhichCanmatchLTC3201ThisWhiteLEDDriverCanha

3、velowpowerconsumptionlowpowersupplysignificantlybetterLEDtoLEDbiasmatchingandSOOILItC811SadequatelydisplaypotentialandpredominanceofWhiteLEDlightingsystemThepaperfnstanalyzessomemaincellofWhiteLEDDriveCircuititisthebaseo

4、fdesigningentirecircuitPaperanalyzesthemechanismofZerOtemperaturecoefficientreference，andmodifiestheclassicalconfigurationtodeducethecircuitwhichCallbeusedinpracticePaperalsobringsintheideaofchargepumpDiscussthetwoclassi

5、calusemodesAndanalyzestheprincipleofDAC，paperanalyzethedifferencevarietyofDAC，andthenchoicetheparallelcurrentmodePapergivesmaincharacteristicofWhiteLEDDriveCircuitForexampleconstantwork姻uen∞，3bitcurrentcontrolmode，MSOPl0

6、PinpackageAnalyzefunctionofpins，thenanalyzetheprincipleofoperationforexamplehowdigitalsignalcontroltheoutputvoltage，theconnectionbet、)veenvoltageofFBandcontrolloopAndgivetherequirememofparameterDesignthecellofchip，thispa

7、rtdesignincludebandgap，chargepump，DAC，shortcircuitandovertemperatureprotectedThendesignentirecuicuitaddingsomecontrolnetwhichmakelo#calcellmaycontrolthechipAttheendPapergivesthesimulationdataandcurveAftertheIChaddesigned

8、paperdesignsthelayoutofthiscircuitThechipisproducedbystandardCMOSO6pmprocessTheresultoftestshowsthatitachievestheaimofparameterrequirementAtthesametimewealsofoundsomedisaeeordbe“vee虹simulationandtestresultUsingthemeasule

9、oftestandsimulationwefoundthereasonoftheseproblemandgivessomeadviceforamendthecircuitUsecompensationtechnologyofresistorswhichhavedifferenttemperaturecoefficienttosolvetheproblemoftemperaturepropertyanduseVBEreferencetec