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DI-131 参数 Datasheet PDF下载

DI-131图片预览
型号: DI-131
PDF下载: 下载PDF文件 查看货源
内容描述: LED驱动器的卤素灯改装 [LED Driver for Halogen Light Bulb Retrofit]
分类和应用: 驱动器卤素灯
文件页数/大小: 2 页 / 758 K
品牌: POWERINT [ Power Integrations ]
 浏览型号DI-131的Datasheet PDF文件第1页  
DI-131  
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voltageꢀisꢀspecifiedꢀasꢀ1.63ꢀVꢀatꢀ49ꢀmA,ꢀwhichꢀallowsꢀitꢀtoꢀbeꢀ  
usedꢀasꢀaꢀreference.ꢀꢀTheꢀoutputꢀvoltageꢀisꢀregulatedꢀtoꢀ<18ꢀVꢀ  
byꢀdisablingꢀMOSFETꢀswitchingꢀcyclesꢀasꢀtheꢀcurrentꢀintoꢀtheꢀ  
FBꢀpinꢀexceedsꢀ49ꢀmA.  
QP  
AV  
QP  
Key Design Points  
AV  
•ꢀ ToꢀpreventꢀEMIꢀcouplingꢀbetweenꢀtheꢀswitchingꢀnodesꢀonꢀ  
theꢀmainꢀboardꢀandꢀtheꢀinputꢀfilterꢀboard,ꢀaꢀshieldꢀboardꢀ  
(connectedꢀtoꢀC2ꢀnegative)ꢀwasꢀplacedꢀbetweenꢀtheꢀtwoꢀ  
PCꢀboardsꢀ(seeꢀFigureꢀ3).ꢀꢀThisꢀgreatlyꢀimprovedꢀtheꢀ  
marginꢀtoꢀtheꢀconductedꢀEMIꢀlimits.  
•ꢀ DiodesꢀD1ꢀandꢀD2ꢀcanꢀbeꢀreplacedꢀbyꢀaꢀsingleꢀ600ꢀVꢀ  
diode.ꢀꢀTwoꢀ250ꢀVꢀdiodesꢀwereꢀusedꢀbecauseꢀtheyꢀtookꢀupꢀ  
lessꢀspaceꢀthanꢀaꢀsingleꢀ600ꢀVꢀdiode.  
-10  
-20  
0.15  
1.0  
10.0  
100.0  
MHz  
•ꢀ IncreasingꢀtheꢀvalueꢀofꢀC3ꢀwillꢀreduceꢀtheꢀrippleꢀcurrentꢀ  
throughꢀtheꢀLEDꢀloadꢀatꢀtheꢀexpenseꢀofꢀincreasedꢀ  
componentꢀsizeꢀandꢀcost.  
Figure 2. Worst Case Conducted EMI (230 VAC).  
•ꢀ Pre-loadꢀresistorꢀR11ꢀensuresꢀcorrectꢀno-loadꢀoperation,ꢀ  
whichꢀenablesꢀtheꢀpowerꢀsupplyꢀtoꢀbeꢀtestedꢀwithoutꢀtheꢀ  
loadꢀconnectedꢀtoꢀit.  
•ꢀ VerifyꢀthatꢀL2ꢀdoesꢀnotꢀsaturateꢀheavilyꢀatꢀtheꢀmaximumꢀ  
currentꢀlimitꢀofꢀU1ꢀ(647ꢀmA).ꢀꢀReferꢀtoꢀtheꢀInductorꢀ  
Manufacturer’sꢀLꢀ–ꢀ20%ꢀcurrentꢀrating.  
0.780  
TOL 0.0ꢀ0”  
•ꢀ Inꢀlessꢀthermallyꢀchallengedꢀenclosures,ꢀtheꢀFBꢀpinꢀcanꢀ  
beꢀusedꢀtoꢀdirectlyꢀsenseꢀtheꢀvoltageꢀacrossꢀresistorsꢀ  
R8ꢀandꢀR10.ꢀꢀThisꢀcanꢀeliminateꢀQ1,ꢀQ2ꢀandꢀassociatedꢀ  
components,ꢀbutꢀrequiresꢀtheꢀcurrentꢀlimitꢀsenseꢀvoltageꢀ  
toꢀincreaseꢀfromꢀ0.65ꢀVꢀtoꢀ1.65ꢀV.ꢀꢀThisꢀwillꢀincreaseꢀtheꢀ  
senseꢀresistorꢀdissipationꢀbyꢀaboutꢀ300ꢀmWꢀandꢀcauseꢀtheꢀ  
internalꢀambientꢀtemperatureꢀofꢀtheꢀsupplyꢀtoꢀincrease.  
•ꢀ MaximizeꢀtheꢀPCBꢀareaꢀthatꢀtheꢀU1ꢀSOURCEꢀpinsꢀ  
connectꢀto,ꢀforꢀoptimalꢀheatsinking.  
1.080”  
1.024”  
0.742”  
0.614”  
•ꢀ Sinceꢀthisꢀdesignꢀdoesꢀnotꢀprovideꢀinputꢀtoꢀoutputꢀ  
isolation,ꢀtheꢀloadꢀLEDsꢀmustꢀbeꢀisolatedꢀfromꢀtheꢀuserꢀviaꢀ  
theꢀlightꢀbulbꢀenclosure.  
PI-4ꢀ77-030707  
Figure 3. Assembled Unit, Dimensions: 0.78 × 1 inch  
(19.8 × 25.4 mm).  
For the latest updates, visit www.powerint.com  
Power Integrations reserves the right to make changes to its products at any time to improve reliability or  
manufacturability. Power Integrations does not assume any liability arising from the use of any device or circuit  
described herein. POWER INTEGRATIONS MAKES NO WARRANTY HEREIN AND SPECIFICALLY DISCLAIMS ALL  
WARRANTIES INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS  
FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT OF THIRD PARTY RIGHTS. The products and applications  
illustrated herein (transformer construction and circuits external to the products) may be covered by one or more U.S.  
and foreign patents or potentially by pending U.S. and foreign patent applications assigned to Power Integrations. A  
complete list of Power Integrations' patents may be found at www.powerint.com. Power Integrations grants its  
customers a license under certain patent rights as set forth at http://www.powerint.com/ip.htm.  
Power Integrations  
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San Jose, CA 95138  
Phone: 1-408-414-9200  
Apps: 1-408-414-9660  
Apps Fax: 1-408-414-9760  
The PI logo,TOPSwitch, TinySwitch,LinkSwitch, DPA-Switch,PeakSwitch,EcoSmart,ꢀ  
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Integrations, Inc. Other trademarks are property of their respective companies. ©2007, Power Integrations, Inc.  
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Rev. B 03/07