While pondering the heat shedding capability of a 100mm diameter sheet of 3mm thick aluminium with an led on a star board bolted to it, I came across the rule of thumb formula: Rha = 50/√(area in cm2) I believe this is for ‘sufficiently thick’ plates Does anyone know where this comes from? And if ...
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from Electronics Weekly https://www.electronicsweekly.com/blogs/led-luminaries/flat-plate-heatsinks-rule-thumb-help-please-2018-08/
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