Texas Instruments LM3530 Handleiding
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SW
IN
OVP
ILED
SCL
SDA
GND
ALS1
C
IN
LM3530
2.7V to 5.5V
Up to 40V
L
D1
ALS2
HWEN
VIN
VIN
Ambient Light
Sensor
Ambient Light
Sensor
INT
PWM
10 k:
V
LOGIC
10 k:10 k:10 k:
C
OUT
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LM3530
SNVS606L–JUNE2009–REVISEDDECEMBER2014
LM3530High-EfficiencyWhite-LEDDriverwithProgrammableAmbientLightSensing
CapabilityandI
2
C-CompatibleInterface
1Features3Description
TheLM3530currentmodeboostconvertersupplies
1
•Drivesupto11LEDsinseries
thepowerandcontrolsthecurrentinupto11series
•1000:1DimmingRatio
whiteLEDs.The839-mAcurrentlimitand2.7-Vto
•90%Efficient
5.5-Vinputvoltagerangemakethedeviceaversatile
backlightpowersourceidealforoperationinportable
•ProgrammableDualAmbientLightSensorInputs
applications.
withInternalALSVoltageSettingResistors
•I
2
CProgrammableLogarithmicorLinear
TheLEDcurrentisadjustablefrom0mAto29.5mA
viaanI
2
C-compatibleinterface.The127different
BrightnessControl
currentstepsand8differentmaximumLEDcurrent
•ExternalPWMInputforSimpleBrightness
levelsgiveover1000programmableLEDcurrent
Adjustment
levels.Additionally,PWMbrightnesscontrolis
•TrueShutdownIsolationforLEDsandAmbient
possiblethroughanexternallogiclevelinput.
LightSensors
ThedevicealsofeaturestwoAmbientLightSensor
•InternalSoft-StartLimitsInrushCurrent
inputs.Thesearedesignedtomonitoranalogoutput
•Wide2.7-Vto5.5-VInputVoltageRange
ambientlightsensorsandprovideprogrammable
adjustmentoftheLEDcurrentwithchangesin
•40-Vand25-VOvervoltageProtectionOptions
ambientlight.Eachambientlightsensorinputhas
•500-kHzFixedFrequencyOperation
independentlyprogrammableinternalvoltagesetting
•839-mAPeakCurrentLimit
resistorswhichcanbemadehighimpedanceto
reducepowerduringshutdown.The500-kHz
2Applications
switchingfrequencyallowsforhighconverter
efficiencyoverawideoutputvoltagerange
•SmartphoneLCDBacklighting
accommodatingfrom2to11seriesLEDs.Finally,the
•PersonalNavigationLCDBacklighting
supportofContentAdjustedBacklightingmaximizes
•2to11SeriesWhite-LEDBacklitDisplayPower
batterylifewhilemaintainingdisplayimagequality.
Source
TheLM3530operatesoverthe−40°Cto85°C
space
temperaturerange.
DeviceInformation
(1)
PARTNUMBERPACKAGEBODYSIZE(MAX)
LM3530DSBGA(12)1.64mmx1.24mm
(1)Forallavailablepackages,seetheorderableaddendumat
theendofthedatasheet.
SimplifiedSchematic
1
AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,
intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.
Product specificaties
| Merk: | Texas Instruments |
| Categorie: | Niet gecategoriseerd |
| Model: | LM3530 |
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