HT7L4091_13 datasheet(1/17 Pages) HOLTEK

Nome de Peças	HT7L4091

Descrição Electrónicos	Universal Step-Down PWM Control For High Brightness LED Lighting Control

PDF	17 Pages

Scroll/Zoom	100%

Fabricante Electrônico	HOLTEK [Holtek Semiconductor Inc]

Página de início	http://www.holtek.com

Logo

1 / 17 page

Rev. 1.20

1

March 12, 2013

Rev. 1.00

PB

March 12, 2013

HT7L4091

Universal Step-Down PWM Control

For High Brightness LED Lighting Control

Features

• InputsupplyACvoltagerange:100V~240V

• Ultralowpower-onstart-upcurrent<30μA

• Integrated25VZenerdiodeinternallyconnectedto

VINpin

• 5VLDOoutputvoltagewith6mAdrivingcurrent

forexternalcomponents

• FrequencyjitterfunctionforenhancedEMI

performance

• Efficiency>85%

• UnderVoltageLockoutfunction–UVLO

• Currentmodeoperationwithcycle-by-cycle

currentlimiting

• Overtemperatureprotectionfunction

• High-currentFETdriveoutput

• LinearandPWMdimmingfunction

• Enhancedshortcircuitprotectionfunction

Applications

• AC/DCandDC/DCpowercontrolforhighpower

LEDlighting

• RGBbacklightingLEDdriver

• Flatpaneldisplaysbacklighting

• Generalpurposeconstantcurrentsource

• SignageanddecorativeLEDlighting

• Batterychargers

General Description

TheHT7L4091deviceprovidesalow-costsolution

for active current mode PWM controls of High

IntensityLEDdrivesystemssuppliedbyeitherACor

DClinepowerlines.Thedeviceoperatesinconstant

off-timemodewhichissuitableforbuckLEDdrivers.

Thelowstart-upandoperatingcurrentsprovides

flexiblepowerrequirementsforhighefficiencyorlow

costapplications.Theswitchfrequencyoff-timecan

beprogrammedusinganexternalresistor.Thepeak

currentmodecontrolachievesgoodoutputcurrent

regulationwithoutrequiringloopcompensationsfora

widerangeofinputvoltages.

IncludedinthedeviceisaPWMdimminginput

whichcanacceptanexternalcontrolsignalwitha

dutyratiofrom0to100%.Theoutputcurrentcan

beprogrammedfrom0to250mAbyapplyingan

externalcontrolvoltageonthelineardimmingcontrol

input.

Thedeviceincludesafrequencyjitterfunctionwhich

helpstoreduceEMIpowersupplyemissions.Also

containedisanenhancedLEDshortcircuitprotection

featuretoprotecttheinternalcircuitryfromdamage

shouldtheLEDsbeshortcircuited.

Thedevicerequiresaminimumnumberofexternal

standardcomponentsandisavailableinan8-pinSOP

packageforsmallareaPCBapplications.

Ordering Information

Part Number

Function Description

HT7L4091

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

HT7L4091-1

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

Nº de peça semelhante - HT7L4091_13

Fabricante Electrônico	Nome de Peças	Folha de dados	Descrição Electrónicos
Holtek Semiconductor In...	HT7L4091	1Mb / 26P	Universal Step-Down PWM Control For High Brightness LED Lighting Control April 28, 2011

More results

Descrição semelhante - HT7L4091_13

Fabricante Electrônico	Nome de Peças	Folha de dados	Descrição Electrónicos
Seiko Instruments Inc	S-8520	2Mb / 34P	PWM CONTROL & PWM/PFM CONTROL STEP-DOWN SWITCHING REGULATOR-CONTROLLERS
Diodes Incorporated	AP1513	176Kb / 8P	PWM CONTROL 2A STEP-DOWN CONVERTER AP1513 Rev. 1
	AP1510	270Kb / 9P	PWM CONTROL 3A STEP-DOWN CONVERTER AP1510 Rev. 7
	AP5002	207Kb / 10P	PWM CONTROL 2A STEP-DOWN CONVERTER AP5002 Rev. 8
Unisonic Technologies	P1886	201Kb / 8P	PWM CONTROL 3A STEP-DOWN CONVERTER
Unisonic Technologies	P1986	196Kb / 6P	PWM CONTROL 3A STEP-DOWN CONVERTER
Holtek Semiconductor In...	HT7L4091	1Mb / 26P	Universal Step-Down PWM Control For High Brightness LED Lighting Control April 28, 2011
SG Micro Corp	SGM3122	368Kb / 17P	PWM Brightness Control
Taiwan Memory Technolog...	T8322AD	124Kb / 10P	PWM Control 1500mA Step-Down Converter
Unisonic Technologies	P3586	332Kb / 6P	PWM CONTROL 3A STEP-DOWN CONVERTER

More results

HT7L4091 Folha de dados(PDF) 1 Page - Holtek Semiconductor Inc

HT7L4091 Folha de dados(HTML) 1 Page - Holtek Semiconductor Inc

Nº de peça semelhante - HT7L4091_13

Descrição semelhante - HT7L4091_13

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

Folha de dados Download

Ligação URL