Note that the calculator we provide can only determine the c w rating of a heat sink for a single led.
Heat sink calculator led.
As an example we take a led cob model which has a nominal forward current if of 450ma and a maximal forward current of 900ma.
Calculate the required led heat sink.
Thermal calculation calculation of the required led cooler thermal resistance rth.
The basics to do that is to understand the scheme at the right each part of the design adds up some heat due to individual thermal resistances of each.
In our experience it generally estimates the overall heat sink volume within 15 of a final design.
In this document we show how to calculate the required thermal resistance of the led cooler.
For example let s say we are selecting a heat sink for an osram prevaled core z3 1100 led cob module which is 1100 lumens.
You could use the results as guidance in selecting a heat sink for multiple leds but this will not consider factors such as the distance between each led total wattage of multiple leds etc.
A reference link has been placed below the calculator for further reading.
This calculator uses the calculation methodology explained in the blog posts how to design a flat plate heat sink and performance of a led flat plate heat sink in multiple orientations the heat sink thermal resistance and temperature of the heat source are calculated by the calculator.