价格:未填
供应:99999
发货:3天内
iW3620是高性能AC/DC离线LED驱动器，器件在高负载条件下工作在准谐振模式，以得到高的效率和各种内置的保护特性，降低EMI，工作频率高达130kHz，通用输入电压85Vac到264Vac，可驱动40W的LED照明。本文介绍了iW3620主要特性以及典型应用电路。 iW3620：DigitalPWMConstantCurrentControllerforAC/DCLEDDriverTheiW3620isahighperformanceAC/DCofflineLEDdriverwhichusesdigitalcontroltechnologytobuildpeakcurrentmodePWMflybackpowersupplies.Thedeviceoperatesinquasi-resonantmodeatheavyloadtoprovidehighefficiencyalongwithanumberofkeybuilt-inprotectionfeatureswhileminimizingtheexternalcomponentcount,simplifyingEMIdesignandloweringthetotalbillofmaterialcost.TheiW3620removestheneedforsecondaryfeedbackcircuitrywhileachievingexcellentlineandloadregulation.Italsoeliminatestheneedforloopcompensationcomponentswhilemaintainingstabilityoveralloperatingconditions.Pulse-by-pulsewaveformanalysisallowsforaloopresponsethatismuchfasterthantraditionalsolutions,resultinginimproveddynamicloadresponse.Thebuilt-incurrentlimitfunctionenablesoptimizedtransformerdesigninuniversaloff-lineapplicationsoverawideinputvoltagerange. iW3620主要特性：Primary-sidefeedbackeliminatesopto-isolatorsandsimplifiesdesignQuasi-resonantoperationforhighestoverallefficiencyandlowEMIUpto130kHzswitchingfrequencyenablessmallsizeVerytightLEDconstantcurrentregulationBuilt-inoutputconstant-currentcontrolwithprimary-sidefeedbackforLEDdriver.Lowstart-upcurrent(10 Atypical)Built-insoftstartBuilt-inshortcircuitprotectionandoutputovervoltageprotectionCurrentsenseresistorshortprotectionOver-temperatureProtectionOpencircuitprotectionUniversalinputrangefrom85Vacto264VacSingle-faultprotectionSmallinputbulkcapacitorLongMTBFHighefficiency iW3620应用：SolidStateLEDlightingforincandescent,halogen,andfluorescenttubereplacement图1iW3620典型应用电路