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DI-131 PDF预览

DI-131

更新时间: 2022-04-23 23:00:11
品牌 Logo 应用领域
帕沃英蒂格盛 - POWERINT 驱动器卤素灯
页数 文件大小 规格书
2页 758K
描述
LED Driver for Halogen Light Bulb Retrofit

DI-131 数据手册

 浏览型号DI-131的Datasheet PDF文件第2页 
Design Idea DI-131  
LinkSwitch®-TN  
LED Driver for Halogen Light Bulb Retrofit  
Application  
Device  
Power Output Input Voltage  
3 W 85-265 VAC  
Output Voltage  
Topology  
LED Lighting LNK306DN  
10 VTYP (9-15 V), 300 mA Non-isolated Buck  
Design Highlights  
DiodeꢀbridgeꢀBR1ꢀrectifiesꢀtheACꢀinputꢀwhileꢀcapacitorsꢀC1ꢀ  
andC2lterit.InductorL1andRF1attenuateconductedEMI.ꢀ  
Inꢀcaseꢀofꢀaꢀcomponentꢀfailure,ꢀRF1ꢀwillꢀactꢀasꢀaꢀfuse.  
•ꢀ FitsꢀinsideꢀstandardꢀGU10ꢀlampꢀbase  
•ꢀ Constantꢀcurrentꢀ(CC)ꢀoutput  
•ꢀ DriveꢀcurrentꢀindependentꢀofꢀLEDꢀVFꢀvariations  
•ꢀ Tightꢀlineꢀregulationꢀ(±5%)ꢀforꢀconstantꢀlightꢀoutput  
•ꢀ Noꢀannoyingꢀlineꢀfrequencyꢀflickerꢀ  
TheMOSFETwithinU1,diodeD3,inductorL2andcapacitorꢀ  
C3formthebuckconverterstage.Thecontrollerwithinꢀ  
U1ꢀregulatesꢀtheꢀoutputꢀcurrentꢀbyꢀenablingꢀandꢀdisablingꢀ  
MOSFETꢀswitchingꢀcycles.  
•ꢀ Universalꢀinputꢀvoltageꢀrangeꢀ  
•ꢀ Aꢀsingleꢀdesignꢀcanꢀbeꢀsoldꢀworldwide  
•ꢀ Consistentlyꢀhighꢀefficiencyꢀacrossꢀentireꢀrange  
•ꢀ MeetsꢀEN55022ꢀBꢀconductedꢀEMIꢀlimits  
•ꢀ Completeꢀovervoltageꢀandꢀoverꢀtemperatureꢀprotection  
•ꢀ Operatesꢀunloaded:ꢀcanꢀbeꢀtestedꢀwithoutꢀtheꢀLEDs  
•ꢀ Auto-restart:ꢀwithstandsꢀshortedꢀoutputꢀindefinitely  
•ꢀ Thermalꢀshutdown:ꢀprotectsꢀentireꢀlampꢀassembly  
Duringꢀ normalꢀ operation,ꢀ theꢀ outputꢀ currentꢀ developsꢀ aꢀ  
voltageꢀdropꢀacrossꢀR8ꢀandꢀR10,ꢀwhichꢀisꢀimpressedꢀacrossꢀ  
C6.WhenthevoltageacrossC6exceedstheꢀVBEofQ1,ꢀ  
Q1andQ2bothturnon.WhenQ2turnson,currentisꢀ  
injectedꢀintoꢀtheꢀFEEDBACKꢀ(FB)ꢀpinꢀofꢀU1ꢀfromꢀC5,ꢀviaꢀ  
R3.ꢀꢀWheneverꢀtheꢀcurrentꢀintoꢀtheꢀFBꢀpinꢀexceedsꢀ49ꢀmA,ꢀ  
MOSFETꢀswitchingꢀisꢀdisabled.ꢀꢀTheꢀcontrollerꢀadjustsꢀtheꢀ  
ratioꢀofꢀenabledꢀandꢀdisabledꢀcyclesꢀtoꢀregulateꢀtheꢀoutputꢀ  
currentꢀatꢀ330ꢀmA.  
Operation  
Theꢀ non-isolatedꢀ buckꢀ converterꢀ shownꢀ inꢀ Figureꢀ 1ꢀ wasꢀ  
designedꢀaroundꢀaꢀmemberꢀofꢀtheꢀLinkSwitch-TNꢀICꢀfamily,ꢀ  
theꢀ LNK306DNꢀ (U1).Aꢀ LNK306ꢀ wasꢀ selectedꢀ sinceꢀ itsꢀ  
minimumꢀcurrentꢀlimitꢀ(450ꢀmA)ꢀensuresꢀthatꢀitꢀwillꢀbeꢀableꢀ  
toꢀdeliverꢀtheꢀrequiredꢀ330ꢀmAꢀofꢀoutputꢀcurrent.  
Duringꢀno-loadꢀoperation,ꢀtheꢀoutputꢀvoltageꢀisꢀsensedꢀbyꢀ  
D1,ꢀD2ꢀandꢀC2.ꢀꢀTheꢀvoltageꢀacrossꢀC5ꢀfeedsꢀcurrentꢀintoꢀ  
theꢀFBꢀpinꢀofꢀU1ꢀthroughꢀdividerꢀR7ꢀandꢀR1.ꢀꢀTheꢀFBꢀpinꢀ  
D1  
D2  
R7  
30 k  
BAV21WS-7-F BAV21WS-7-F  
Q2  
MMST3906  
C5  
100 nF  
25 V  
R3  
10 kΩ  
R6  
10 kΩ  
R1  
4.7 kΩ  
R4  
10 kΩ  
R9  
4.7 kΩ  
Q1  
MMST3904  
C4  
100 nF  
25 V  
BP  
C6  
100 nF  
25 V  
9-15 V,  
300 mA  
FB  
S
D
J3  
L2  
BR1  
MB6S  
600 V  
R8  
1 mH  
RF1  
10 Ω  
2.5 W  
2 Ω  
LinkSwitch-TN  
U1  
LNK306DN  
L
R10  
R11  
1 kΩ  
C1  
4.7 µF  
380 V  
C2  
C3  
2.2 µF  
25 V  
12 Ω  
4.7 µF  
85-265  
VAC  
D3  
MURS160T3  
380 V  
L1  
1 mH  
N
J4  
PI-4575-030707  
Figure 1. 3 W LED, Halogen Bulb Replacement using LinkSwitch-TN in Non-Isolated Buck Converter Technology.  
March 2007  
DI-131  

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