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 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. 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.

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Compare leds and simulate system performance.

Cree led heatsink calculator.

We can now write a formula for the junction temperature of any given led. Thermal resistance model for a simple led lighting assembly. Heat sink 85 w. Heat sink 30 w.

Product categories xlamp leds. 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. Edison opto led cooling. 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.

Heat sink 70 w. In our experience it generally estimates the overall heat sink volume within 15 of a final design. Heat sink 40 w. 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.

Temperature ww 0 020 0 015 0 010 0 005 0 000 0 005 0 010 0 015 0 020. J series leds. Cree xlamp leds are designed with an electrically isolated thermal path. Metalized vias in fr 4 pcbs.

Compare leds within each product family. Cree s heat sinks provide a simple and cost effective method to improve the lmh2 thermal performance in various lighting applications. 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. 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. 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. Find the right leds and led modules for your lighting needs. So rth heatsink 3 31 c w 0 2 c w 3 11 c w maximal.

For all valid led drive currents the pct quickly and easily does the following. For certain illumination systems design thermal vias enable the use of fr 4 circuit boards. Cree the thermal resistance between the led junction and ambient r th j a is the sum of these resistances.

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