Mosaic
Well-Known Member
Hi :
Sometimes you salvage heatsinks and you don't know their C/W temp ratio.
Well here's a site that has a reasonable approach. All u need are the heat sink measurements.....I found it to be helpful when computing heatsink perf. with a 120mm Fan (16L/sec flow loaded).
http://robots.freehostia.com/Heatsinks/Heatsinks.html
Also, here's another calculator for determining how your heatsink C/W can derive the junction temp of your heatsunk devices. Use the device data sheet for the thermal data.
http://www.daycounter.com/Calculators/Heat-Sink-Temperature-Calculator.phtml
These calcs allowed me to up the designed drive on a linear power supply to 16A from 12A with no prototyping.
Sometimes you salvage heatsinks and you don't know their C/W temp ratio.
Well here's a site that has a reasonable approach. All u need are the heat sink measurements.....I found it to be helpful when computing heatsink perf. with a 120mm Fan (16L/sec flow loaded).
http://robots.freehostia.com/Heatsinks/Heatsinks.html
Also, here's another calculator for determining how your heatsink C/W can derive the junction temp of your heatsunk devices. Use the device data sheet for the thermal data.
http://www.daycounter.com/Calculators/Heat-Sink-Temperature-Calculator.phtml
These calcs allowed me to up the designed drive on a linear power supply to 16A from 12A with no prototyping.
