PR4101B [PREMA]
High Power LED Buck Driver;
| 型号： | PR4101B |
| 厂家： | 
Prema |
| 描述： | High Power LED Buck Driver |
| 文件： | 总24页 (文件大小：2872K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LEDDriverPR4101
HighPowerLEDBuckDriver
APPLICATIONS
ThePR4101isaLEDbuckdriverfordrivingone
or several high power LEDs in series. The
supply voltage can be up to 40V, with an
output current of more than 1A using an
external n-channel MOSFET switching
transistor.ThePR4101AwithadditionalPWMand
•Halogenlamporfilamentbulbreplacementby
LEDs
•Generalillumination
•Warninglights
•Automotivelighting
•Indicatorsigns
powerdowninputisdeliveredSOP14packaged, •LCDbacklighting
whilethePR4101BisofferedSO8packaged.
ABSOLUTEMAXIMUMRATINGS
FEATURES
Parameter
Min Max Units
V ,VDI(nodamage) -0.3 50 [V]
•Adjustableoutputcurrentofseveralamps
•Supplyvoltageupto40V
•Dimmingwithphase-cutdimmer
•BrightnesscontrolwithPWM(PR4101Aonly)
•Outputcurrenttemperaturecompensation
•Delayedstartpossible(PR4101Aonly)
•Overtemperatureprotection
•FrequencyspreadingforimprovedEMI
•Lowstandbycurrentof<35µA
•Undervoltagelockout
CC
Allotherpins
14 [V]
OperatingChip
TemperatureRange(over -20 125 [°C]
temperatureprotection)
StorageTemperature
-55 150 [°C]
Range
ElectrostaticDischarge
(ESD)Protection
2
[kV]
TYPICALAPPLICATIONCIRCUIT
Vcc
7...40 V
Vcc
VDI
D1
CLED
5VLo
CIN
Gnd
SUB
L
One or
more LEDs
NDRV
Vsense
5VHi
RVsense
Rsense
PR4101
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LEDDriverPR4101
PINConfigurations/PINDescriptions
Test
PwrDwn
Delay
RTK
1
2
3
14
13
12
11
10
9
Temp
Vsense
NDRV
VDI
Vsense
NDRV
VDI
8
7
6
5
RTK
GND
5VHi
5VLo
1
2
PWM
4
5
3
4
GND
Vcc
Vcc
SUB
5VHi
6
7
5VLo
8
PR4101B:PackageSOP8
Topsidemarking:versioncode"PR4101B"
PR4101A:PackageSOP14
Topsidemarking:versioncode"PR4101"
PinNo. PinNo.
PR4101A PR4101B
PinFunctionDescription
PinName
Fortestandinternaluseonly
1 n.c. Test
2 n.c. PwrDwn
PowerDown,sleepmodeformin.powerconsumption.
WhenconnectedtoGND,NDRVisclampedtoGND.
Notconnected:DelayStartisdisabled
connectedtoGND:DelayStartisenabled
3 n.c. Delay
4 n.c. PWM
IfV <V thebuckconverterisswitchedoff.
PWM
refPWM
IfV >V thebuckconverterisswitchedon.
PWM
refPWM
Ground
5
6
2 GND
2 SUB
SubstratehastobeconnectedtoGNDforPR4101A(internallyconnectedtoGND
forPR4101B)
Internal5Vlinearregulatoroutputforhighcurrents.Connectacapacitorof100
nFtoGND.Voltageisnotforexternaluse.
7
3 5VHi
4 5VLo
Internal5Vlinearregulatoroutputforlowcurrents.Connectacapacitorof
100nFtoGND.Voltageisnotforexternaluse.
8
9
Supplyvoltage
5
Vcc
Undervoltagedetectionpin.Ifunused,connecttoVcc.
Forusewithphasefiredcontrollers(seeapplicationnotes).
10 6
VDI
Gateconnectionforanexternaln-channelMOSFET.
11 7 NDRV
12 8 VSense
Feedbackforcontrollingtheoutputcurrent.Connectthispintotheseries
resistorR andthesenseresistorR .TheexternalMOSFETisswitched
VSENSE
SENSE
offwhenthevoltageatthispinishigherthanV .
SENSE
Voltageoutputoftheinternalchiptemperaturesensor(overtemperature
protection).Pleasesee„ElectricalCharacteristics“forrelationshipbetweenV
13 n.c. Temp
TEMP
andthechiptemperatureT .
CHIP
Softstartfeatureandtemperaturecompensationoftheoutputcurrent.By
connectingforexampleaNTCresistorfromRTKtoGNDthesensingthreshold
voltageVsensewillbedecreaseddependingontheNTC´stemperature.A
14
1 RTK
capacitorC connectedtoGNDoffersasoftrampupoftheLEDcurrent.
SOFT
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LEDDriverPR4101
ElectricalCharacteristics
Vcc=12VDC,Ta=25°C,L=470µH(unlessotherwisenoted)
Symbol Parameter
Conditions Min Typ Max Units
Vcc Supplyvoltage
7
40
[V]
VDI Undervoltagedetection
Start-up
Shut-off
9.0
[V]
[V]
6.0 7.0
30
I
Supplycurrent,PwrDwn=0V
[µA]
suppOFF
I
Supplycurrent,
PwrDwn=open
3.0
[mA]
suppON
V
NDRV
GateoutputvoltageHIGH
3.0 3.8
[V]
I
OutputsourcecurrentatNDRV
50
20
[mA]
OUTsource
I
OutputsinkcurrentatNDRV
Operatingcenterfrequency
Frequencyspreading
[mA]
[kHz]
[%]
OUTsink
f
125
5
OP
f
SP
V
ThresholdvoltageatR
PinRTKnot
connected
200
[mV]
SENSE
SENSE
t
Delaystartperiod
(PR4101Aonly)
250
[µs]
DELAY
V
ThresholdvoltagePWMinput
(PR4101Aonly)
1000
[mV]
RefPWM
f
FrequencyofexternalPWM
signal(PR4101Aonly)
500 [Hz]
[µs]
PWM
t
Min.pulsedurationofPWM
(PR4101Aonly)
2
PWM
V
Outputvoltageofinternal T =100°C
1.60
2.15
[V]
[V]
TEMP
chip
temperaturesensoratpin
TEMP(PR4101Aonly)
T =0°C
chip
T
OT
Overtemperatureprotection
junctiontemperature
Shut-off
125
90
[°C]
[°C]
Resume
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LEDDriverPR4101
BlockDiagram
[.../...]:PinnumbersforPR4101A/PR4101B
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LEDDriverPR4101
CharacteristicPerformanceCurves
1x3WLEDoperatedbyvariedR andInductances(giveninthecaption)
sense
C =470µF,R =1kΩ,C =100µF,C =220nF,Ta=25°C(unlessotherwisenoted)
IN
VSENSE
LED
5VHi/Lo
900
800
700
600
500
400
300
200
100
0.25Ohm/100µH
0.25Ohm/680µH
0.33Ohm/100µH
0.33Ohm/680µH
0.50Ohm/100µH
0.50Ohm/680µH
1.00Ohm/100µH
1.00Ohm/680µH
0
5
10
15
20
25
30
35
40
45
50
55
60
SupplyVoltage[V]
3x3.5WLEDoperatedinseriesbyvariedR andInductances(giveninthecaption)
sense
C =470µF,R =1kΩ,C =100µF,C =220nF,Ta=25°C(unlessotherwisenoted)
IN
VSENSE
LED
5VHi/Lo
900
800
700
600
500
400
300
200
100
0.25Ohm/100µH
0.25Ohm/680µH
0.33Ohm/100µH
0.33Ohm/680µH
0.50Ohm/100µH
0.50Ohm/680µH
1.00Ohm/100µH
1.00Ohm/680µH
0
10
15
20
25
30
35
40
45
50
55
60
SupplyVoltage[V]
4
3
2
40
35
30
25
20
15
10
1
5
0
0
0
10
20
30
40
50
0
10
20
30
40
50
SupplyVoltage[V]
SupplyVoltage[V]
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LEDDriverPR4101
CharacteristicPerformanceCurves
EFFICIENCIESAREGIVENFORVARIEDCONDITIONSUSINGAFIXEDINDUCTANCEOF660µH
100%
3LED/0.25Ohm
3LED/0.33Ohm
3LED/0.50Ohm
3LED/1.00Ohm
1LED/0.25Ohm
1LED/0.33Ohm
1LED/0.50Ohm
1LED/1.00Ohm
90%
80%
70%
60%
10
15
20
25
30
35
40
45
50
SupplyVoltage[V]
EFFICIENCIESAREGIVENFORVARIEDCONDITIONSUSINGAFIXEDINDUCTANCEOF330µH
100%
3LED/0.20Ohm
3LED/0.25Ohm
3LED/0.33Ohm
3LED/0.50Ohm
3LED/1.00Ohm
1LED/0.20Ohm
1LED/0.25Ohm
1LED/0.33Ohm
1LED/0.50Ohm
1LED/1.00Ohm
90%
80%
70%
60%
10
15
20
25
30
35
40
45
50
SupplyVoltage[V]
EFFICIENCIESAREGIVENFORVARIEDCONDITIONSUSINGAFIXEDSUPPLYVOLTAGEOF15V
100%
90%
80%
70%
1LED/330µH
1LED/660µH
3LED/330µH
3LED/660µH
60%
0
100
200 300 400 500 600 700 800 900
LEDCurrent[mA]
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LEDDriverPR4101
ExamplesforvaryingLEDapplications
TYPICALAPPLICATIONWITH12/24VACSUPPLYFORAMINIMUMBOARDSIZE
ThefollowingcircuitdrivesoneLEDfroma12...24VACsupply.ThiscircuitusesthePR4101BinSOP8
packageandisoptimizedforalownumberofsmall-sizedexternalcomponentstohaveasmallPCB.
LEDanddriveraresuppliedfromthefull-waverectifiedandsmoothedvoltage.Ripplesonthesupply
shouldbesmallenoughtoavoidaperiodinwhichthevoltagebecomeslowerthantheLEDforward
voltage,orbelowtheundervoltageshut-off(seespecificationofVDI).
TheundervoltagedetectionpinVDIisconnectedtoVcc.
WithR =0.24Ωasinthediagram,theLEDcurrentisapprox.850mA.Forothercurrentsseebelow
SENSE
SelectionofR .
SENSE
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LEDDriverPR4101
ExamplesforvaryingLEDapplications
TYPICALAPPLICATIONWITH12VDCSUPPLY
Theshowncircuitdrives2stringsof2LEDsinseriesfroma12VDCsupply.Theminimumsupplyvoltage
isgivenbytheforwardvoltageoftheLEDs,theDCresistanceoftheinductor,andtheR oftheFET.As
DSon
aruleofthumb,inmostcasesthesupplyvoltageshouldbeatleast2Vhigherthantheforwardvoltage
oftheLEDs.AssumingaV of3.5VperLED,thismeansthatthecircuitwillworkwithasupplyof9Vand
F
higher.
AstherearetwostringsofLEDsinparallel,theforwardvoltageoftheLEDsmustbematchingtoavoid
anunequalcurrentdistribution.
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LEDDriverPR4101
ExamplesforvaryingLEDapplications
TYPICALAPPLICATIONWITH12VACSUPPLY
ThefollowingcircuitdrivesthreeLEDsinseriesfroma12...24VACsupply.LEDanddriveraresupplied
fromthefull-waverectifiedandsmoothedvoltage.Ideally,afterthefull-waverectifier,VccisVACx1.41,
whichissufficienttodrivethreeLEDsinseriesfromVAC=12V.Ripplesonthesupplyshouldbesmall
enoughtoavoidaperiodinwhichthevoltagebecomeslowerthantheLEDforwardvoltage,orbelowthe
undervoltageshut-off(seespecificationofVDI).
TheundervoltagedetectionpinVDIisconnectedtoVcc.
WithR =(0.47/2)Ωasinthediagram,theLEDcurrentisapprox.850mA.Forothercurrentssee
SENSE
belowSelectionofR .
SENSE
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LEDDriverPR4101
ExamplesforvaryingLEDapplications
TYPICALAPPLICATIONWITH12VACSUPPLYANDPHASECUTDIMMERS
Thecircuitshownnextallowsdimmingwithphase-firedcontrolbyaconventionalthyristordimmer,
operationwithelectronicdimmersandelectronictransformersisalsopossible.ThePR4101isdimmable
withleadingandtrailingedgephasecontrol.InthisapplicationtheundervoltagedetectionpinVDIis
connectedtotherectified,butunsmoothedAC,allowingtosensethepulsewidthofthephase-cut
supply.Inthiswaytheconverterisshutoffinthephasecutoutbythephasefiredcontroller,evenifthe
smoothedsupplyatVccholdsasufficientvoltagelevel,andtheLEDbrightnessisdimmedinaway
similartothatofaconventionalfilamentbulb.
Evenwithoutphasecutting, thereisaperiodinwhichVDIfallsbelowtheundervoltageshut-off
threshold,shuttingtheLEDdowninthisperioduntilthevoltagereachesthestartupthresholdagain.
ThereforeintheapplicationshowntheeffectiveLEDcurrentisreducedagainstthecircuitwithVDI
connectedto thesmoothedDCsupply, e.g. at12VAC/50Hzitis68%ofthenominal brightness
(theoreticalvalue).
C3/R3servesasafilterforhighfrequencies,e.g.frompowersupplieswithswitchingregulators,that
wouldinterferewiththeregulatorloopofPR4101.
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LEDDriverPR4101
FurtherInformation
TYPICALAPPLICATIONWITH12VACSUPPLYANDPHASECUTDIMMERS
Supplyfromphase-firedSCRdimmer.DifferentdutycyclesonVDIsignal.
---Vcc
---VDIsignal
---LEDcurrent(voltageata1Ωresistor)
Measuredwith: Vcc=12VAC
C =C4=100µF
LED
C =220nF
C3=2,2nF,
5VHi/Lo
R3=100kΩ
L=470µH
C =C1=2000µF
IN
R =0.25Ω
SENSE
LED:1x3W(Luxeon)
CuttingatlargephaseanglesreducesboththeaveragesupplyvoltageVccandalsotheVDIvoltage.Ifit
fallsbelowtheforwardvoltageoftheLEDs,orbelowtheundervoltagethreshold,thecircuitstops
working.TherightdiagramshowsthecaseatwhichthesupplyvoltageandthereforealsotheVDIsignal
isclosetotheVDIthreshold.
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LEDDriverPR4101
AfurtherDimmingOpportunity
PWMCONTROL(ONLYPR4101A)
output.Inthefollowing,theLEDmeancurrent
vs. PWM duty cycle at a PWM frequency of
500HzisshownfordifferentvaluesofRsense:
Brightness can also be controlled by an
externalPWM(pulsewidthmodulation)signal
viathePWMpin.
In this way a wide dimming range can be
achieved.Thedevicewillbeturnedoffandon
depending on the duty cycle of the control
signalresultinginaproportionalaverageoutput
current. ThePWMpincanbedrivendirectly
fromamicrocontrolleroutputorwithaNPN
transistor.Theaverageoutputcurrentwillbe
800
0.25Ohm
0.33Ohm
0.50Ohm
600
1.00Ohm
400
200
0
ILEDAVG=ILEDnom⋅D
withthedutycycleD:
TOFF
D=
TONTOFF
0
25
50
75 100
A PWM frequency of 500Hz, or lower is
recommended,tominimizelinearityerrorsdue
to the rise and fall times of the converter
PWMDutyCycle[%]
1x1WLED;PWM@ Vcc=40V
PWMcontrolledwithL=100µH
PWMcontrolledwithL=330µH
BehaviourataPWMfrequencyof3000Hzwith
two different inductors. The slow reaction,
especiallywiththe330µHinductance,causesa
non-linearityinbrightnessvs.PWMdutycycle,
limitingtherecommendedPWMfrequenciesto
<500Hz,dependingonthedutycyclerange
required.ForoperationwithPWMcontrolthe
inductanceshouldbeassmallaspossible,but
ontheotherhand,alsotheLEDcurrentripple
willincrease,ascanbeseenbycomparisonof
thetwographs.Thereforeitisimportanttofind
a compromise between current ripple, PWM
frequencyanddutycyclerange.
---PWM
---LEDcurrent,voltageata1Ω
resistor
---clocksignal(testpin)
Conditions: dutycycle=50%
C =470µF
IN
C =100µF
LED
C =220nF
5VHi/Lo
Vcc=15V
R =0.25Ω
SENSE
1x3WLuxeonLED
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LEDDriverPR4101
ApplicationNotes
SELECTIONOFTHEINPUTCAPACITORC
SELECTIONOFINDUCTORANDC
in
LED
TheinputcapacitorisnecessaryincaseofAC
supplyvoltagestosmooththesupplyvoltage.A
Selectionoftheinductorvaluedependsaloton
thesupplyvoltage,thenumberofconnected
valuebetween100µFand4700µFfornormal LEDs,butalsoontheallowedcurrentrippleand
ACandof470µFupto10000µFforphase-cut thedesiredefficiency.ForasmallerLEDcurrent
supplyvoltagesisrecommended.
Inparallela100nFcapacitorshouldbeplaced
closetotheICsupplypins.
Step-downregulatorsdrawcurrentfromthe
inputsupplyinpulseswithveryfastriseand
falltimes.Theinputcapacitorisalsorequiredto
highervaluesabove660µHshouldbeused.In
casethataminimizedboardsizeisdesired
inductorvaluesaround100µHmaybeselected
butefficiencyandLEDcurrentripplearenot
optimizedinthiscase.Thesaturationcurrentof
theinductorsmustbehigherthantheLEDpeak
reducetheresultingvoltagerippleatthePR4101 current.AlowDCresistanceofthecoilavoids
inputandtoforcethisswitchingcurrentintoa additionallossofefficiency.
tight local loop, minimizing EMI. The input AcapacitorvalueofCLEDbetween22µFand
capacitormusthavealowimpedanceatthe 1000µFinparalleltotheLEDisrecommended
switchingfrequencytodothiseffectively,andit to reduce the LED current ripple and avoid
shouldhaveanadequateripplecurrentrating.
exceedingtheLEDcurrentrating.
SELECTIONOFEXTERNALMOSFET
SELECTIONOFR ANDR
VSENSE
SENSE
The n-channel MOSFET must have a gate
thresholdvoltageoflessthan3VandalowON
resistance. A recommended transistor is the
InternationalRectifierIRLL024N.Toimprovethe
behaviourofthemodule,longlinesbetween
theICandthetransistorshouldbeavoided.
The input V needs a series resistor
SENSE
R =1kΩwhiletheLEDcurrentisdefinedby
VSENSE
theselectionofR .Thenominalvalueofthe
SENSE
currentsenseresistorcanbecalculatedwith
thefollowingformula:
VSENSE
SELECTIONOFTHEEXTERNALDIODE
RSENSE
=
ILED
ASchottkydiodewithfastrecoveryisneeded
toreducethevoltagedrop.Thediodemustbe
abletocarrytheLEDcurrentflowingduringthe
OFFtimeofthedriver.Thereversevoltageof
the diode should be higher than the input
voltage.
ThevalueofV canbefoundin
SENSE
„ElectricalCharacteristics“.
Forexample:WithanLEDcurrentof1Aand
V =200mV,R hasavalueof200mΩ.
SENSE
SENSE
Thefollowingtablegivessomeresistorvalues
DELAYSTARTFEATURE(onlyPR4101A)
LEDCurrent
R
SENSE
Adelayedstartispossiblebyconnectingthe
pinDelaytoGnd.Withinthedelaystartperiod
theoutputcurrentisswitchedoff. Afterthe
delaystartperiodtheoutputcurrentrisesto
100%ofthenominalcurrent.Thedelaystart
period is fixed and cannot be changed by
externalcomponents.
350mA
700mA
1000mA
0.571Ω
0.286Ω
0.200Ω
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LEDDriverPR4101
ApplicationNotes
SOFTSTART
Thefollowingtablegivessomecapacitorvalues:
WithanexternalcapacitoratRTKtheoutput
current can ramp up continuously within a
programmableperiod.
SoftStartTime
C
SOFT
10ms
100ms
3s
100nF
1µF
22µF
It is possible to combine temperature
compensationandsoftstartfunctionality.Asoft
startistriggeredbyaresetthatisinitiated
eitherbyapplyingthesupplyvoltage, orby
startingtheICupwiththePWRDWNsignal.
PassingthethresholdatVDIdoesnottrigger
thesoftstarthowever,thereforesupplybya
phase-cut voltage from a dimmer does not
interfere with soft start - see oscilloscope
diagram.
CORRESPONDINGOSCILLOSCOPEIMAGES
SoftstartonRTK,C =100nF
SoftstartonRTK,C =1µF
(phase-cutinputvoltage)
SOFT
SOFT
---Vcc
---PwrDwn
---LEDcurrent(voltageata1Ωresistor)
---clocksignal(testpin)
Measuredwith C =470µF
C =100µF
C =220nF
IN
LED
5VHi/Lo
L=470µH
Vcc=15V
R =0.25Ω
SENSE
1x3WLuxeonLED
Supply by a phase-cut voltage from a dimmer does not interfere with soft start - see right diagram.
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LEDDriverPR4101
ApplicationNotes
TEMPERATURECOMPENSATIONOFTHEOUTPUT
CURRENT
itsnominalsetvaluewhentheLEDtemperature
rises above a predefined threshold. For this
thermalcompensationanNTCresistoratthe
RTKpincanbeusedtosensethetemperature.
TheNTCvaluehastobeselectedaccordingto
the application requirements. For many
purposes a nominal value around 470kΩ is
suitable.
800
600
400
200
TheNTCchangesthevoltageatRTK,thusinfluencing
theVSensethresholdandtheLEDcurrent.
0
0 20 40 60 80100120140160180200
HighbrightnessLEDsoftenneedtobesupplied
byatemperaturecompensatedcurrentinorder
togetastableandreliableoperationalsoat
highertemperatures.Thisisnormallyachieved
byreducingtheLEDcurrentproportionallyfrom
V_RTK[mV]
TherelationshipbetweenthevoltageatRTKandthe
LEDcurrent(1x1W)forRsense=0.25Ωisshown.
ThenominalRTKvoltagewithoutNTCis200mV
OVERTEMPERATUREPROTECTION(onlyPR4101)
OPERATIONWITHINSUFFICIENTVOLTAGE
Aninternaltemperaturesensordetectsthechip
InoperationwithseveralLEDsinseries,itis
temperature.Overtemperatureisdetectedat possiblethatthesupplyvoltageishigherthan
T ,thentheNDRVandthe5VHi-regulatorsare
the undervoltage detection threshold, but
insufficient to drive the programmed LED
currentbecauseoftheLEDforwardvoltage.
ThenthedesiredLEDcurrentcanobviouslynot
bereached.
In this case the MOSFET is permanently
switchedthrough,allowingthemaximumLED
current possible, but always less than the
currentsetpoint.
PWMcontroldoesnotworkinthismode.
When the supply rises, the converter will
resumenormaloperation.
In any mode the converter can be safely
switchedoffwiththePwrDwnsignal.
OFF
switchedoffandswitchedonagainatachip
temperatureofT .ThevoltageV atthepin
ON
TEMP
TEMPrelatestotheinternalchiptemperature,
pleasesee„ElectricalCharacteristics“.
FREQUENCYSPREADING
To reduce the EMI of the converter the
switchingfrequencyisvariedinarangearound
thecenterfrequency.ThisdecreasestheEMI
powerdensitythatisotherwiseconcentrated
atasingleclockfrequency.
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LEDDriverPR4101
Demoboard
ForPR4101ademoboardisavailablethatshowstheoperationofthecomponents.Here,aLEDdriverand
severalpowerLEDsarereplacinghalogenlamps.AtthepinsIN+andIN-anACvoltageupto24VoraDC
voltagefrom9Vupto35Vcanbesupplied.SeveralLEDscanbeconnected,thepotentalnumber
dependsontheinputvoltage.Thedemoboardincludesabridgerectifier,necessarycapacities,an
externalMOStransistor,asenseresistorandaninductor.Thesizeoftheboardis35x35±2mm.
SCHEMATICDIAGRAM
LISTOFCOMPONENTS
Name
D1–D7
C1
Value
Descriptions
40V/1ASchottkydiodeMBRS140
100nF/100V
Cin
C3/C5
C8/C9
C10
100nF/63V
100µF/35Velectrolyticcapacitors ifhighercurrentripplesareallowed,C9(Cled)isnotneeded
2.2nF
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LEDDriverPR4101
R2/R4R1/R3 1.2Ω/1%1Ω/1%
Rsense
R5
R6
10Ω
1kΩ
10Ωresistorasashuntforcurrentmeasurements
Rvsense
TogetherwithC10alowpassfilterforoperationwith
electronictransformers
R8
120kΩ
L1
IC1
T1
220µH,WE-PDTypeL(Würth)
PR4101A(PREMA)
SO14package
IRLL024N(InternationalRectifier) ExternalNDMOSswitch
Solderbridge(open)
Open:Iledaround350mA*(Rsense=0.54Ω)
J1
SetsRsense
Closed:Iledaround700mA*(Rsense=0.27Ω)
J2
J3
J4
ActivatesPwrDwn
ActivatesDelay
Solderbridge(open)
Solderbridge(open)
Dimmingoperation
Solderbridge(open),closefordeactivatedimmingoperation
*LEDcurrentcanvaryanddependsonsupplyvoltageandnumberofLEDs
DEMOBOARD
st
1 SIDE
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LEDDriverPR4101
Demoboard
nd
2 SIDE
CONNECTIONS
Name
IN+/IN-
LED+/A
LED-/K
Description
ConnectVacupto24VorVdcfrom9Vupto35V
ConnecttheanodeoftheLED
ConnectthecathodeoftheLED
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LEDDriverPR4101
Demoboard
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LEDDriverPR4101
AvailablePackage
TECHNICALDRAWING
Packagetype:SOP08L(PR4101B)orSOP14Lpackage(PR4101A)
Deliveryindieformuponrequest.
Package
D E H A A1 e b L Copl. w
SOP08L Nom 4.90 3.90 6.00 1.75 0.15 1.27 0.41 0.72
PR4101B max
4°
4°
0.10
0.10
SOP14L Nom 8.65 3.90 6.00 1.75 0.15 1.27 0.41 0.72
PR4101A max
ALLPARTSDELIVERED,COMPLYWITHRoHS.FINISHISPURETIN.
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LEDDriverPR4101
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LEDDriverPR4101
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LEDDriverPR4101
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LEDDriverPR4101
Disclaimer
InformationprovidedbyPREMAisbelievedtobeaccurateandcorrect.However,noresponsibilityisassumedby
PREMAforitsuse,norforanyinfringementsofpatentsorotherrightsofthirdpartieswhichmayresultfromitsuse.
PREMAreservestherightatanytimewithoutnoticetochangecircuitryandspecifications.
LifeSupportPolicy
PREMASemiconductorsproductsarenotauthorizedforuseascriticalcomponentsinlifesupportdevicesor
systemswithouttheexpresswrittenapprovalofPREMASemiconductor.Asusedherein:
1.Lifesupportdevicesorsystemsaredevicesorsystemswhich,(a)areintendedforsurgicalimplantintothebody,
or(b)supportorsustainlife,andwhosefailuretoperformwhenproperlyusedinaccordancewithinstructionsfor
useprovidedinthelabeling,canbereasonablyexpectedtoresultinasignificantinjurytotheuser.
2.Acriticalcomponentisanycomponentofalifesupportdeviceorsystemwhosefailuretoperformcanbe
reasonablyexpectedtocausethefailureofthelifesupportdeviceorsystem,ortoaffectitssafetyoreffectiveness.
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