n to
PDFS/L79L.pdf
rnally
h flag.
he package
area of
. The
k.***" >>>
Look at the difference between the
nt, with the same copper pour.
(I'm assuming they're measuring to the leads rather than the actual epoxy case, otherwise their lower junction-to-case for the SOT89 wouldn't make sense--it's thicker than an SO-8.)
Cheers, James Arthur
That's what we don't know and what a datasheet should specify.
Still, that's assumptions and I can't design on assumptions but John has hard data so that's good.
-- Regards, Joerg http://www.analogconsultants.com/
Half a watt should be easy from a SOT89. A little topside copper patch maybe. If you don't have much room, via down to a copper pour on the bottom and/or an inner layer. An isolated inner layer pour will spread heat and dump heat into adjacent planes.
-- John Larkin Highland Technology, Inc lunatic fringe electronics
Data sheet thermals are generally not to be trusted. When in doubt, experiment.
An 0603 resistor will safely dump half a watt, if you do it right.
-- John Larkin Highland Technology, Inc lunatic fringe electronics
No space at all, this board will look like the inside of a Tokyo subway during rush hour. After the pushers have squeezed the people in. So it'll have to be a few vias without thermal reliefs to a copper plane inside the board.
-- Regards, Joerg http://www.analogconsultants.com/
ion to
20PDFS/L79L.pdfnternally
tach flag.
f the package
ate area of
ing. The
sink.***" >>>>>
^2
mbient, with the
But it's moot--both sources indicate that the SOT89 wins.
z pour:
Cheers, James Arthur
ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.