Texas Instruments LM3409-Q1 Handleiding

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IADJ

EN

CSN

LM3409/HV

UVLO

D1

L1

C

IN

V

IN

I

LED

VCC

COFF

GND

Q1

CSP

C

F

R

OFF

PGATE

C

OFF

R

UV2

R

UV1

DAP

VIN

V

O

R

SNS

1

2

3

4

56

7

8

9

10

Product

Folder

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Buy

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Software

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Reference

Design

AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,

intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

LM3409

,

LM3409-Q1

,

LM3409HV

,

LM3409HV-Q1

SNVS602L–MARCH2009–REVISEDJUNE2016

LM3409,-Q1,LM3409HV,-Q1P-FETBuckControllerforHigh-PowerLEDDrivers

1

1Features

1

•LM3409-Q1andLM3409HV-Q1areAutomotive

GradeProducts:AEC-Q100Grade1Qualified

•2-Ω,1-APeakMOSFETGateDrive

•V

IN

Range:6Vto42V(LM3409,LM3409-Q1)

•V

IN

Range:6Vto75V(LM3409HV,LM3409HV-

Q1)

•Differential,High-SideCurrentSense

•Cycle-by-CycleCurrentLimit

•NoControlLoopCompensationRequired

•10,000:1PWMDimmingRange

•250:1AnalogDimmingRange

•SupportsAll-CeramicOutputCapacitorsand

Capacitor-lessOutputs

•Low-PowerShutdownandThermalShutdown

•ThermallyEnhanced10-Pin,HVSSOPPackage

2Applications

•LEDDriver

•ConstantCurrentSource

•AutomotiveLighting

•GeneralIllumination

3Description

TheLM3409,LM3409-Q1,LM3409HV,and

LM3409HV-Q1areP-channelMOSFET(PFET)

controllersforstep-down(buck)currentregulators.

Theyofferwideinputvoltagerange,high-side

differentialcurrentsensewithlowadjustable

thresholdvoltageandfastoutputenable/disable

functionandathermallyenhanced10-pin,HVSSOP

package.Thesefeaturescombinetomakethe

LM3409familyofdevicesidealforuseasconstant

currentsourcesfordrivingLEDswhereforward

currentsupto5Aareeasilyachievable.

TheLM3409devicesuseconstantoff-time(COFT)

controltoregulateanaccurateconstantcurrent

withouttheneedforexternalcontrolloop

compensation.AnalogandPWMdimmingareeasyto

implementandresultinahighlylineardimmingrange

withexcellentachievablecontrastratios.

ProgrammableUVLO,low-powershutdown,and

thermalshutdowncompletethefeatureset.

DeviceInformation

(1)

PARTNUMBERPACKAGEBODYSIZE(NOM)

LM3409

HVSSOP(10)3.00mm×3.00mm

PDIP(14)19.177mm×6.35mm

LM3409-Q1

HVSSOP(10)3.00mm×3.00mmLM3409HV

LM3409HV-Q1

(1)Forallavailablepackages,seetheorderableaddendumat

theendofthedatasheet.

TypicalApplicationSchematic

Product specificaties