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SC635 PDF预览

SC635

更新时间: 2024-09-18 03:33:23
品牌 Logo 应用领域
商升特 - SEMTECH 驱动器闪光灯
页数 文件大小 规格书
12页 363K
描述
Charge Pump Flash LED Driver

SC635 数据手册

 浏览型号SC635的Datasheet PDF文件第2页浏览型号SC635的Datasheet PDF文件第3页浏览型号SC635的Datasheet PDF文件第4页浏览型号SC635的Datasheet PDF文件第5页浏览型号SC635的Datasheet PDF文件第6页浏览型号SC635的Datasheet PDF文件第7页 
SC635  
Charge Pump  
Flash LED Driver  
POWER MANAGEMENT  
Description  
Features  
TheꢁSC635ꢁisꢁaꢁhigh-currentꢁchargeꢁpumpꢁdesignedꢁspe-  
cificallyꢀforꢀuseꢀwithꢀwhiteꢀLEDsꢀusedꢀinꢀcameraꢀflashꢀap-  
plications.ꢁOnlyꢁtwoꢁsmallꢁbucketꢁcapacitorsꢁareꢁrequiredꢁ  
toꢁdevelopꢁtheꢁoutputꢁdrive,ꢁprovidingꢁaꢁlowꢁEMIꢁsolutionꢁ  
comparedꢁtoꢁinductiveꢁboostꢁregulators.  
uꢁ Twoꢁselectableꢁmodesꢁ-ꢁFlashꢁandꢁSpotlight  
uꢁ 200mAꢁmaxꢁoutputꢁ-ꢁFlashꢁMode  
uꢁ Spotlightꢁmodeꢁsetꢁtoꢁ40%ꢁofꢁFlashꢁCurrent  
uꢁ 3.0Vꢁtoꢁ5.25VꢁInputꢁRange  
uꢀ Externalꢀpinsꢀforꢀcontrolꢀofꢀflashꢀandꢀspotlightꢀmodesꢀ  
forꢁsynchronizationꢁtoꢁaꢁcameraꢁmoduleꢁorꢁgraphicsꢁ  
controller  
TheꢁSC635ꢁhasꢁtwoꢁmodesꢁofꢁoperation:ꢁFlashꢁmodeꢁandꢁ  
Spotlightꢁmode.ꢁInꢁFlashꢁmode,ꢁtheꢁSC635ꢁisꢁcapableꢁofꢁ  
deliveringꢁ 200mAꢁ toꢁ aꢁ high-intensityꢁ LEDꢁ duringꢁ imageꢁ  
capture.ꢁꢁInꢁSpotlightꢁmodeꢁtheꢁSC635ꢁoutputsꢁ40%ꢁofꢁtheꢁ  
Flashꢁmodeꢁcurrentꢁforꢁgeneralꢁpurposeꢁlightingꢁorꢁstatusꢁ  
indication.  
uꢁ Shortꢁcircuit,ꢁover-voltage,ꢁandꢁover-temperature  
protection  
uꢁ Soft-startꢁfunctionality  
uꢁ MicroꢁLeadꢁPackageꢁMLPD-ꢀ0,ꢁ3mmꢁxꢁ3mm  
AnꢁexternalꢁresistorꢁisꢁconnectedꢁinꢁseriesꢁwithꢁtheꢁLEDꢁtoꢁ  
setꢁtheꢁcurrent.ꢁInꢁFlashꢁmode,ꢁthisꢁresistorꢁcanꢁdissipateꢁ  
upꢁtoꢁ50mW,ꢁreducingꢁtheꢁpowerꢁdissipationꢁrequirementꢁ  
ofꢀtheꢀSC635.ꢀTheꢀflashꢀinputꢀ(FLASH)ꢀoverridesꢀtheꢀcon-  
trolinput(CTRL)tomakesureꢀtheꢀflashꢀfunctionꢀisꢀacti-  
vatedꢁwhenꢁcalledꢁfor.  
Applications  
uꢁ MobileꢁCameraꢁPhones  
uꢁ DigitalꢁCameras  
uꢁ PDAsꢁwithꢁBuilt-inꢁCameras  
TheꢀthermallyꢀefficientꢀMLPD-10ꢀpackageꢀandꢀceramicꢀby-  
passꢁandꢁbucketꢁcapacitorsꢁmakeꢁtheꢁSC635ꢁaꢁhighꢁout-  
putꢁcurrentꢁdriverꢁthatꢁrequiresꢁminimalꢁPCBꢁarea.ꢁ  
TypicalꢁApplicationꢁCircuit  
TypicalꢁApplicationꢁCircuit  
SC635  
1
9
VIN  
C1+  
C1-  
C2+  
C2-  
VOUT  
white LED  
10µF  
1µF  
3
VBAT  
8
4
GND  
1µF  
1µF  
6
7
5
ISET  
CTRL  
10  
2
RSET  
FLASH  
FLASH  
CTRL  
www.semtech.com  
Decemberꢁ2,ꢁ2005  

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