Cree Led Heatsink Calculator

Any led cooler which does better than a thermal resistance lower value of 3 11 c w in free air conditions would make that our led case temperature tc will remain below the required 75 c.

Cree led heatsink calculator. So rth heatsink 3 31 c w 0 2 c w 3 11 c w maximal. Cree xlamp leds are designed with an electrically isolated thermal path. The power dissipated by the led p d is determined by multiplying the led s forward voltage v f by its forward current i f. Heat sink 70 w.

Heat sink 40 w. Cree product characterization tool pct identifies the best cree xlamp leds for your design the cree product characterization tool pct allows you to select from multiple lighting system design parameters to compare up to three led models simultaneously to help in making critical design choices. Temperature ww 0 020 0 015 0 010 0 005 0 000 0 005 0 010 0 015 0 020. Cree xlamp led lm 80 summary a tm 21 calculator from the environmental protection agency epa can be used with the lm 80 data to predict lumen degradation and expected lifetime under specific operating conditions.

Compare leds within each product family. A cob led module of 20x20mm for 20w or a cob led module of 40x40mm for 20w can have a total different heat conduction towards the heat sink so that is why some smd led down light keep 180mm. Heat sink 85 w. Cree the thermal resistance between the led junction and ambient r th j a is the sum of these resistances.

Cree leds xhp35 star xp l star xm l2 star xp e2 color stars xp e2 white stars xp g2 star xt e white star xt e royal blue star cxb 1310 hd array cxb 1520 hd array custom 3 up cree nichia leds 12v nichia 757 led nichia 157 led. Cree pioneered this led feature almost ten years ago to enable the use of 1 see the long term lumen maintenance application note. A reference link has been placed below the calculator for further reading. Edison opto led cooling.

Find the right leds and led modules for your lighting needs. Compare leds and simulate system performance. For certain illumination systems design thermal vias enable the use of fr 4 circuit boards. Cree s heat sinks provide a simple and cost effective method to improve the lmh2 thermal performance in various lighting applications.

Designed to be used with the 6000 and 8000 lm lmh2 cree s 85 w heat sink is part of the ecosystem of parts for the lmh2 led module family to help lighting manufacturers speed their time to market. The heat sink size calculator is based on a well established equation for estimating heat sink volume during the early stages of heat sink design. We can now write a formula for the junction temperature of any given led. Thermal resistance model for a simple led lighting assembly.

For all valid led drive currents the pct quickly and easily does the following. J series leds. Metalized vias in fr 4 pcbs.