Datasheet > HT7L4091-1

HT7L4091-1

更新时间： 2022-04-27 22:42:04

品牌	Logo	应用领域
台湾合泰/盛群 - HOLTEK		/
页数	文件大小	规格书
17页	3134K
描述
Universal Step-Down PWM Control For High Brightness LED Lighting Control

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HT7L4091-1 数据手册

HT7L4091

Universal Step-Down PWM Control

For High Brightness LED Lighting Control

Features

General Description

•ꢀ InputꢀsupplyꢀACꢀvoltageꢀrange:ꢀ100V~240V

TheꢀHT7L4091ꢀdeviceꢀprovidesꢀaꢀlow-costꢀsolutionꢀ

forꢀactiveꢀcurrentꢀmodeꢀPWMꢀcontrolsꢀofꢀHighꢀ

IntensityꢀLEDꢀdriveꢀsystemsꢀsuppliedꢀbyꢀeitherꢀACꢀorꢀ

DCꢀlineꢀpowerꢀlines.ꢀTheꢀdeviceꢀoperatesꢀinꢀconstantꢀ

off-timeꢀmodeꢀwhichꢀisꢀsuitableꢀforꢀbuckꢀLEDꢀdrivers.ꢀ

Theꢀlowꢀstart-upꢀandꢀoperatingꢀcurrentsꢀprovidesꢀ

ﬂexibleꢀpowerꢀrequirementsꢀforꢀhighꢀefﬁciencyꢀorꢀlowꢀ

costꢀapplications.ꢀTheꢀswitchꢀfrequencyꢀoff-timeꢀcanꢀ

beꢀprogrammedꢀusingꢀanꢀexternalꢀresistor.ꢀTheꢀpeakꢀ

currentꢀmodeꢀcontrolꢀachievesꢀgoodꢀoutputꢀcurrentꢀ

regulationꢀwithoutꢀrequiringꢀloopꢀcompensationsꢀforꢀaꢀ

wideꢀrangeꢀofꢀinputꢀvoltages.

•ꢀ Ultraꢀlowꢀpower-onꢀstart-upꢀcurrentꢀ<ꢀ30μA

•ꢀ Integratedꢀ25VꢀZenerꢀdiodeꢀinternallyꢀconnectedꢀtoꢀ

VINꢀpin

•ꢀ 5VꢀLDOꢀoutputꢀvoltageꢀwithꢀ6mAꢀdrivingꢀcurrentꢀ

forꢀexternalꢀcomponents

•ꢀ FrequencyꢀjitterꢀfunctionꢀforꢀenhancedꢀEMIꢀ

performance

•ꢀ Efﬁciencyꢀ>ꢀ85%

•ꢀ UnderꢀVoltageꢀLockoutꢀfunctionꢀ ꢀUVLO

–

•ꢀ Currentꢀmodeꢀoperationꢀwithꢀcycle-by-cycleꢀ

currentꢀlimiting

IncludedꢀinꢀtheꢀdeviceꢀisꢀaꢀPWMꢀdimmingꢀinputꢀ

whichꢀcanꢀacceptꢀanꢀexternalꢀcontrolꢀsignalꢀwithꢀaꢀ

dutyꢀratioꢀfromꢀ0ꢀtoꢀ100%.ꢀTheꢀoutputꢀcurrentꢀcanꢀ

beꢀprogrammedꢀfromꢀ0ꢀtoꢀ250mAꢀbyꢀapplyingꢀanꢀ

externalꢀcontrolꢀvoltageꢀonꢀtheꢀlinearꢀdimmingꢀcontrolꢀ

input.

•ꢀ Overꢀtemperatureꢀprotectionꢀfunction

•ꢀ High-currentꢀFETꢀdriveꢀoutput

•ꢀ LinearꢀandꢀPWMꢀdimmingꢀfunction

•ꢀ Enhancedꢀshortꢀcircuitꢀprotectionꢀfunction

Theꢀdeviceꢀincludesꢀaꢀfrequencyꢀjitterꢀfunctionꢀwhichꢀ

helpsꢀtoꢀreduceꢀEMIꢀpowerꢀsupplyꢀemissions.ꢀAlsoꢀ

containedꢀisꢀanꢀenhancedꢀLEDꢀshortꢀcircuitꢀprotectionꢀ

featureꢀtoꢀprotectꢀtheꢀinternalꢀcircuitryꢀfromꢀdamageꢀ

shouldꢀtheꢀLEDsꢀbeꢀshortꢀcircuited.

Applications

•ꢀ AC/DCꢀandꢀDC/DCꢀpowerꢀcontrolꢀforꢀhighꢀpowerꢀ

LEDꢀlighting

•ꢀ RGBꢀbackꢀlightingꢀLEDꢀdriver

•ꢀ Flatꢀpanelꢀdisplaysꢀbackꢀlighting

•ꢀ Generalꢀpurposeꢀconstantꢀcurrentꢀsource

•ꢀ SignageꢀandꢀdecorativeꢀLEDꢀlighting

•ꢀ Batteryꢀchargers

Theꢀdeviceꢀrequiresꢀaꢀminimumꢀnumberꢀofꢀexternalꢀ

standardꢀcomponentsꢀandꢀisꢀavailableꢀinꢀanꢀ8-pinꢀSOPꢀ

packageꢀforꢀsmallꢀareaꢀPCBꢀapplications.

Ordering Information

Part Number

Function Description

HT7L4091

Frequency jitter function enabled, V_UVLO(H)=16V (typ.)

Frequency jitter function disabled, V_UVLO(L)=8V (typ.)

HT7L4091-1

Rev. 1.20

March 12, 2013

12 3 4 5 6 7...17

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与HT7L4091-1相关器件

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HT7M2136	HOLTEK	PIR Detector Miniaturized Module	获取价格
HT7M2156	HOLTEK	PIR Detector Miniaturized Module	获取价格

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