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Reference Design for Commercial Downlight with LED
OS SSL AE LED
Ch. Neureuther, Dr. A. Markytan
Seite 27. Lux et Color Veszpremiensis Szimposium | 2008 november 6 | OS SSL AE LED |
Reference Designs
1. Introduction
2. Commercial Downlights
3. Construction & Optical parts of the luminaire
4. Part list & involved suppliers & LLFY-partners
5. Illuminance simulation of the luminaire
6. Measurement of the luminaire
7. Thermals Engineering
8. Electrical Engineering
9. Conclusions
Seite 37. Lux et Color Veszpremiensis Szimposium | 2008 november 6 | OS SSL AE LED |
Commercial Downlights
Seite 47. Lux et Color Veszpremiensis Szimposium | 2008 november 6 | OS SSL AE LED |
Commercial Downlights
RocketLIGHT DiscLIGHT
Seite 57. Lux et Color Veszpremiensis Szimposium | 2008 november 6 | OS SSL AE LED |
Optical parts of Luminaire
1
2
LW W5KM JZ 7LTc TYP = 5600 K
1 LED 71 lm x 37 = 2627 lm
LCW W5AM-JXKX-4O9QTc TYP = 3500K
1 LED 63.5 lm x 37 = 2350 lm
Seite 67. Lux et Color Veszpremiensis Szimposium | 2008 november 6 | OS SSL AE LED |
Part list of Luminaire + involved suppliers & LLFY-partners
OOSSRRAAMM OOSSJJuunnggbbeecckkeerr
FFiisscchheerreelleekkttrroonniikk
BBeerrggqquuiissttHHooffmmaannnnLLeeiitteerrppllaatteenn
FFrraaeenn
Seite 77. Lux et Color Veszpremiensis Szimposium | 2008 november 6 | OS SSL AE LED |
Illuminance simulation of Luminaire
Seite 87. Lux et Color Veszpremiensis Szimposium | 2008 november 6 | OS SSL AE LED |
all-1-Lall-1-xall-1-y
L(Pixel)1.3001.2501.2001.1501.1001.0501.000950900850800750700650600550500450400350300250200150100500
L(cd
/m²)
;x;y
280260240220200180160140120100806040200
L [cd/m2]
2500 mm
f = 25 mm
3000 mm
2600 mm
Luminaire
Measurements on luminaire
Rho = 0.9
Luminance distribution
Lambertian wall
Seite 97. Lux et Color Veszpremiensis Szimposium | 2008 november 6 | OS SSL AE LED |
Measurement on luminaire
L [cd/m2]
Luminance on Reflector
E[lx]
Illuminance distribution
Em = 1007 lx
L*πρE=
Ωο
Ω0
Seite 107. Lux et Color Veszpremiensis Szimposium | 2008 november 6 | OS SSL AE LED |
Measurement on luminaire
all-1-xall-1-y
L(Pixel)1.3001.2501.2001.1501.1001.0501.000950900850800750700650600550500450400350300250200150100500
x;y
0,36
0,355
0,35
0,345
0,34
0,335
0,33
Color distribution
chromaticity coordinates x,y
Seite 117. Lux et Color Veszpremiensis Szimposium | 2008 november 6 | OS SSL AE LED |
Thermal Considerations and Resultsemissivity correction factor = 0.95ambient temperature = 22°CRth JS max = 11 K/W (GD+)
Rth FR4 (Thermal Vias) = 9.7 K / W
Measured:P_min = 350mA* 2.85V = 0.99 W P_max = 350mA* 3.2V = 1.12 W
T_heatsink = 40 °CT_solderpoint = 45 °C
Tj ~ 55°C Phiv@55°C/Phiv@25°C ~ 0.94 dcx,dcy < -0.003
Seite 127. Lux et Color Veszpremiensis Szimposium | 2008 november 6 | OS SSL AE LED |
Thermal Engineering / Components
• Thermal Interface:
• PCB: FR4 with thermal vias:
• FISCHER Heatsinks:SK 546 1000 ALSK 505 1000 AL
Seite 137. Lux et Color Veszpremiensis Szimposium | 2008 november 6 | OS SSL AE LED |
Electrical Engineering - Luminaire
Luminaire• 37 x 1 W Golden DRAGON Argus• 6 independent circuits• Board Material: FR4 d = 0.8 mm• Electric Layer (Cu) 35 µm
•Possible: • µc (ATmega), PDs, NTC
Seite 147. Lux et Color Veszpremiensis Szimposium | 2008 november 6 | OS SSL AE LED |
Electrical Engineering - Ballast
Ballast• Supertex Driver HV9931LG & Design• Use of 2 boards, each 80V 350 mA PWM dimmable• Prototype status
Seite 157. Lux et Color Veszpremiensis Szimposium | 2008 november 6 | OS SSL AE LED |
Conclusions
Seite 167. Lux et Color Veszpremiensis Szimposium | 2008 november 6 | OS SSL AE LED |
Spotlight White- HexLIGHT: Diamond Dragon LCW W5AP-LZMZ-4L8N
Seite 177. Lux et Color Veszpremiensis Szimposium | 2008 november 6 | OS SSL AE LED |
Tasklight White – BridgeLIGHT: OSTAR Helios CW
Seite 187. Lux et Color Veszpremiensis Szimposium | 2008 november 6 | OS SSL AE LED |
LEDs used
Downlight White - DiscLIGHT:Golden DRAGON Plus (LCW W5AM)
Downlight White – RocketLIGHT:Golden DRAGON ARGUS (LW W5KM)
Spotlight White- HexLIGHT: Diamond DRAGON (LCW W5AP)
Tasklight White – BridgeLIGHT: OSTAR SMT in warmwhite