Texas Instruments LM36922 Handleiding
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LM36922
SNVSA29–MAY2015
LM36922HighlyEfficientDual-StringWhiteLEDDriver
1Features3Description
TheLM36922isanultra-compact,highlyefficient,
1
•1%MatchedCurrentSinksAcross(Process,
twostringwhite-LEDdriverdesignedforLCDdisplay
Voltage,Temp)
backlighting.Thedevicecanpowerupto8series
•3%CurrentSinkAccuracyAcross(Process,
LEDsatupto25mAperstring.Anadaptivecurrent
Voltage,Temp)
regulationmethodallowsfordifferentLEDvoltagesin
eachstringwhilemaintainingcurrentregulation.
•11-BitDimmingResolution
•Upto91.6%SolutionEfficiency
TheLEDcurrentisadjustedviaanI
2
Cinterfaceor
throughalogiclevelPWMinput.ThePWMdutycycle
•DrivesfromOnetoTwoParallelLEDStringsatup
isinternallysensedandmappedtoan11-bitcurrent
to28V
thusallowingforawiderangeofPWMfrequencies
•PWMDimmingInput
andnoise-freeoperation.
•I
2
CProgrammable
Thedeviceoperatesoverthe2.5-Vto5.5-Vinput
•Selectable500-kHzand1-MHzSwitching
voltagerangeand-40°Cto85°Ctemperaturerange.
FrequencywithOptional–12%shift
•AutoSwitchFrequencyMode(250kHz,500kHz,
DeviceInformation
(1)
1MHz)
PARTNUMBERPACKAGEBODYSIZE(MAX)
•FourConfigurableOvervoltageProtection
LM36922DSBGA(12)1.755mmx1.355mm
Thresholds(17V,21V,25V,29V)
(1)Forallavailablepackages,seetheorderableaddendumat
theendofthedatasheet.
•FourConfigurableOvercurrentProtection
Thresholds(750mA,1000mA,1250mA,1500
space
mA)
space
•ThermalShutdownProtection
space
2Applications
space
PowerSourceforSmartPhoneandTablet
space
Backlighting
space
SimplifiedSchematic
TypicalString-to-StringMatchingvsLEDCurrent
1
AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,
intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.
Product specificaties
| Merk: | Texas Instruments |
| Categorie: | Niet gecategoriseerd |
| Model: | LM36922 |
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