Does anyone know a good rule of thumb for Power LED heatsinking?
(PLease, no guesswork )
Basically, I would like to know the ratio of Watts-in to Watts-heat for the average modern large surface mount LED.
I can't find info anywhere, regardless of make. I'm Googled-out.
e.g. assume a rated 3W white LED . It gets hot. How do I calculate the heatsink rating? Does anyone know of a link anywhere that will give a reasonable guide of power/heat/light 'efficiency'?
I realise I could heatsink it based on Watts In = Watts heat.
Nothing wrong with belt-and-braces, but something a bit more 'accurate' would be really nice.
(PLease, no guesswork )
Basically, I would like to know the ratio of Watts-in to Watts-heat for the average modern large surface mount LED.
I can't find info anywhere, regardless of make. I'm Googled-out.
e.g. assume a rated 3W white LED . It gets hot. How do I calculate the heatsink rating? Does anyone know of a link anywhere that will give a reasonable guide of power/heat/light 'efficiency'?
I realise I could heatsink it based on Watts In = Watts heat.
Nothing wrong with belt-and-braces, but something a bit more 'accurate' would be really nice.