Texas Instruments LP8862-Q1 Bedienungsanleitung
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Brightness (%)
System Efficiency (%)
0102030405060708090100
50
55
60
65
70
75
80
85
90
95
D001
VIN=5V
VIN=8V
VIN=12V
VIN=16V
LP8862-Q1
FB
PWM
OUT1
L1
D1
V
OUT
up to 45 V
4.5...40 V
C
OUT
SD
VSENSE_N
R
ISET
Up to 160 mA/string
SW
LDO
FSET
V
IN
VDDIO/EN
PGND
GND
PAD
VIN
R
ISENSE
ISET
FAULT
VDDIO
FAULT
R
FSET
Q1
R1R2
R
GS
C
LDO
BRIGHTNESS
SYNC
EN
C
IN
C
IN BOOST
OUT2
C
FB
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AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,
intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.
LP8862-Q1
SNVSA75D–NOVEMBER2015–REVISEDMAY2017
LP8862-Q1Low-EMIAutomotiveLEDDriverWithTwo160-mAChannels
1
1Features
1
•QualifiedforAutomotiveApplications
•AEC-Q100QualifiedWiththeFollowingResults:
–DeviceTemperatureGrade1:–40°Cto
+125°CAmbientOperatingTemperature
•InputVoltageOperatingRange4.5Vto40V
•TwoHigh-PrecisionCurrentSinks
–CurrentMatching1%(Typical)
–LEDStringCurrentupto160mAperChannel
–DimmingRatioof10000:1at100Hz
•IntegratedBoost/SEPICConverterforLEDString
Power
–OutputVoltageupto45V
–SwitchingFrequency300kHzto2.2MHz
–SwitchingSynchronizationInput
–SpreadSpectrumforLowerEMI
•Power-LineFETControlforInrushCurrent
ProtectionandStandbyEnergySaving
•ExtensiveFaultDetectionFeatures
–FaultOutput
–InputVoltageOVP,UVLO,andOCP
–OpenandShortedLEDFaultDetection
–ThermalShutdown
•MinimumNumberofExternalComponents
2Applications
•Backlightfor:
–AutomotiveInfotainment
–AutomotiveInstrumentClusters
–SmartMirrors
–Heads-UpDisplays(HUD)
–CentralInformationDisplays(CID)
–Audio-VideoNavigation(AVN)
SystemEfficiency
3Description
TheLP8862-Q1isanautomotivehigh-efficiency,low-
EMI,easy-to-useLEDdriverwithintegratedDC-DC
converter.TheDC-DCsupportsbothboostand
SEPICmodesofoperation.Thedevicehastwohigh-
precisioncurrentsinksthatcanprovidehighdimming
ratiobrightnesscontrolwithaPWMinputsignal.
Theboost/SEPICconverterhasanadaptiveoutput
voltagecontrolbasedontheLEDcurrentsink
headroomvoltages.Thisfeatureminimizespower
consumptionbyadjustingthevoltagetothelowest
sufficientlevelinallconditions.DC-DCsupports
spreadspectrumforswitchingfrequencyandan
externalsynchronizationwithadedicatedpin.Awide-
rangeadjustablefrequencyallowstheLP8862-Q1to
avoiddisturbanceforAMradioband.
TheinputvoltagerangefortheLP8862-Q1isfrom
4.5Vto40Vtosupportautomotivestop/startand
loaddumpconditions.ThedevicesupportsPWM
brightnessdimmingratioof10000:1for100-Hzinput
PWMfrequency.TheLP8862-Q1integrates
extensivefaultdetectionfeatures.Thedevicehasan
optiontodriveanexternalp-FETtodisconnectthe
inputsupplyfromthesystemintheeventofafault.
Thisfeaturealsoreducesinrushcurrentandstandby
powerconsumption.
DeviceInformation
(1)
PARTNUMBERPACKAGEBODYSIZE(NOM)
LP8862-Q1HTSSOP(20)6.50mm×4.40mm
(1)Forallavailablepackages,seetheorderableaddendumat
theendofthedatasheet.
SimplifiedSchematic
Produktspezifikationen
| Marke: | Texas Instruments |
| Kategorie: | Nicht kategorisiert |
| Modell: | LP8862-Q1 |
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