hi all
having succesfully got my sound to light circuit
working, thanks to the forum, i know have to address
heatsinking. im hoping i have understood the maths of
heatsink calculation so here goes.
circuit supply 12VDC
A TIP41 with a max of 6A continuous, Switchs 2*12V/20W
halogen G4 bulbs.
the bulbs draw 3.33A leaving 2.67A across the TIP41
2.67A*12V=32.04W
i need to keep the temp of the TIP below 100oC inc
ambient tempreture. so......................
100oC/32.04W=3.12oC/W
meaning the spec of my heatsink must be =<3.12oC/W
this seems ok i dare say i have it wrong and explianing it to me wont help
my english is better than my maths, my concern is i cant find a heatsink
of the value or less as calculated.
Regards
Fenris
having succesfully got my sound to light circuit
working, thanks to the forum, i know have to address
heatsinking. im hoping i have understood the maths of
heatsink calculation so here goes.
circuit supply 12VDC
A TIP41 with a max of 6A continuous, Switchs 2*12V/20W
halogen G4 bulbs.
the bulbs draw 3.33A leaving 2.67A across the TIP41
2.67A*12V=32.04W
i need to keep the temp of the TIP below 100oC inc
ambient tempreture. so......................
100oC/32.04W=3.12oC/W
meaning the spec of my heatsink must be =<3.12oC/W
this seems ok i dare say i have it wrong and explianing it to me wont help
my english is better than my maths, my concern is i cant find a heatsink
of the value or less as calculated.
Regards
Fenris