Reference Design for Commercial Downlight with LED OS SSL AE LED Ch. Neureuther, Dr. A. Markytan

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

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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