LED节能灯电源驱动芯片MSP1131资料

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1、EditedbyFoxitPDFEditorCopyright(c)byFoxitSoftwareCompany,2004ForEvaluationOnly.MSP1131UniversalHighPreliminarySpecificationBrightnessLEDDriver■GeneralDescriptionTheMSP1131isaPWMhigh-efficiencyLEDdrivercontrolIC.ItallowsefficientoperationofHighBrightness(HB)LEDsfromvoltage

2、sourcesrangingfrom8VDCupto350VDC.TheMSP1131controlsanexternalMOSFETatfixedswitchingfrequencyupto300kHz.Thefrequencycanbeprogrammedusingasingleresistor.TheLEDstringisdrivenatconstantcurrentratherthanconstantvoltage,thusprovidingconstantlightoutputandenhancedreliability.The

3、outputcurrentcanbeprogrammedbetweenafewmilliampsanduptomorethan1.0A.MSP1131usesaruggedhighvoltagejunctionisolatedprocessthatcanwithstandaninputvoltagesurgeofupto350V.OutputcurrenttoanLEDstringcanbeprogrammedtoanyvaluebetweenzeroanditsmaximumvaluebyapplyinganexternalcontro

4、lvoltageatthelineardimmingcontrolinputoftheMSP1131.TheMSP1131providesalow-frequencyPWMdimminginputthatcanacceptanexternalcontrolsignalwithadutyratioof0-100%andafrequencyofuptoafewkilohertz.■Features●>90%Efficiency●8Vto350Vinputrange●Constant-currentLEDdriver●Applicationsf

5、romafewmAtomorethan1AOutput●LEDstringfromonetohundredsofdiodes●PWMLow-FrequencyDimmingviaEnablepin●InputVoltageSurgeratingsupto350V■Applications●DC/DCorAC/DCLEDDriverapplications●RGBBacklightingLEDDriver●BackLightingofFlatPanelDisplays●Generalpurposeconstantcurrentsource●

6、SignageandDecorativeLEDLighting●Automotive●Chargers1EditedbyFoxitPDFEditorCopyright(c)byFoxitSoftwareCompany,2004ForEvaluationOnly.MSP1131UniversalHighPreliminarySpecificationBrightnessLEDDriver■TypicalApplication■AbsoluteMaximumRatingsVintoGND............................

7、.......….........................-0.5Vto+350VCS.....................…………………………………….........-0.3Vto0.8VLD,PWM_DtoGND...........……......................-0.3Vto(Vdd---0.3V)GATEtoGND.................................………......-0.3Vto(Vdd+0.3V)ContinuousPowerDissipation(TA=+25°C

8、)(Note1)8-PinSO(derate6.3mW/°Cabove+25°C)…..……..…….....630mWOperatingTemperatureRange...........