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參數(shù)資料
| 型號(hào)： | SC635MLTRT |
| 廠商： | Semtech Corporation |
| 英文描述： | Charge Pump Flash LED Driver |
| 中文描述： | 電荷泵閃光LED驅(qū)動(dòng)器 |
| 文件頁(yè)數(shù)： | 12/12頁(yè) |
| 文件大?。?/td> | 357K |
| 代理商： | SC635MLTRT |
2005SemtechCorp.
www.semtech.com
POWER MANAGEMENT
SC635
SuggestedLayout
ThesensetracebetweenPin6andRisroutedaround
thegroundvias,allowingtheshortestgroundreturnpath
possible.ThesensetraceisconnectedtoRattheposi-
tiveterminalpadforthemostaccurateoutputpossible.
Thebottomcopperlayerismostlyagroundplanewithno
obstructionsbetweenthegroundvias.Thesmallerrect-
angletotheleftconnectstheinputpowertoVINpin1and
inputcapacitorC4.Thetwotracesatthelowerleftarefor
logicinputsFLASHandCTRL.Thetracetotherightisthe
ISETpin“sense”trace.Thesensetraceisroutedoutof
thepathofthereturninggroundcurrent.
LayoutGuidelines
Thefollowinglayoutissuggestedforatwo-layerdesign.
ThecapacitorsCandC2arethebucketcapacitorsand
eachconductsthefullloadcurrentofupto200mApulsed
foronehalfclockcycle.C3istheoutputdecouplingca-
pacitorplacedneartheSC635VOUTpin.C4isthein-
putdecouplingcapacitorplacedneartheSC635VINpin.
Multipleviasshouldbeusedwheneveritisnecessaryto
changelayersonnetsconnectingtopinsVIN,VOUT,GND,
C1-,C1+,C2-andC2+.ResistorR1isroutedwithavery
low resistance connection between R1 and GND pin 3.
BottomCopper
TopCopper
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