Texas Instruments LM2756 Bedienungsanleitung
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LM2756
D1A
V
IN
V
OUT
-+
D2A
D3AD4A
D53
I
2
C Control
Signals
D1B
SDIO
1 µF
1 µF
1 µF
1 µF
GND
D62
C1+
C1-
C2+
C2-
SCL
D1C
HWEN
GROUP A
GROUP B
GROUP C
I
SET
Capacitors: Murata GNM1M2R61C105ME18D 1 µF dual
capacitors, or 1 µF single capacitor equivalent
LM2756
www.ti.com
SNVS504C–JULY2007–REVISEDMAY2013
LM2756Multi-DisplayInductorlessLEDDriverwith32ExponentialDimmingStepsin
DSBGA
CheckforSamples:LM2756
1
FEATURES
APPLICATIONS
2
•Drivesupto8LEDswithupto30mAofDiode
•DualDisplayLCDBacklightingforPortable
CurrentEachApplications
•32ExponentialDimmingStepswith800:1•LargeFormatLCDBacklighting
DimmingRatioforGroupA(Upto6LEDs)
•DisplayBacklightingwithIndicatorLight
•8LinearDimmingStatesforGroupsB(Upto3
LEDs)andD1C(1LED)DESCRIPTION
TheLM2756isahighlyintegrated,switched-
•ProgrammableAuto-DimmingFunction
capacitor,multi-displayLEDdriverthatcandriveup
•3IndependentlyControlledLEDGroupsVia
to8LEDsinparallelwithatotaloutputcurrentof
I
2
CCompatibleInterface
180mA.Regulatedinternalcurrentsourcesdeliver
•Upto90%Efficiency
excellentcurrentandbrightnessmatchinginallLEDs.
•TotalSolutionSize<21mm
2
TheLEDdrivercurrentsinksaresplitintothree
•LowProfile20BumpDSBGAPackage
independentlycontrolledgroups.Theprimarygroup
(1.615mm×2.015mm×0.6mm)
(GroupA)canbeconfiguredtodrivefour,fiveorsix
LEDsforuseinthemainphonedisplay,whilethe
•0.4%AccurateCurrentMatching
secondarygroup(GroupB)canbeconfiguredto
•InternalSoft-StartLimitsInrushCurrent
driveone,twoorthreeLEDsfordrivingsecondary
•TrueShutdownIsolationforLED’s
displays,keypadsand/orindicatorLEDs.An
additionaldriver,D1C,isprovidedforadditional
•WideInputVoltageRange(2.7Vto5.5V)
indicatorlightingfunctions.
•ActiveHighHardwareEnable
TypicalApplicationCircuit
1
Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsof
TexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
2Alltrademarksarethepropertyoftheirrespectiveowners.
PRODUCTIONDATAinformationiscurrentasofpublicationdate.
Copyright©2007–2013,TexasInstrumentsIncorporated
ProductsconformtospecificationsperthetermsoftheTexas
Instrumentsstandardwarranty.Productionprocessingdoesnot
necessarilyincludetestingofallparameters.
Produktspezifikationen
| Marke: | Texas Instruments |
| Kategorie: | Nicht kategorisiert |
| Modell: | LM2756 |
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