Here is another trick that works for SMT parts. Place a copper pour on the reverse of the PCB not electrically connected to the power dissipating circuits on the other side. Don't solder mask this poured area. Then attach an aluminum bar (I use 6mm High x 25mm Wide x <as long as needed>) on the copper pour side using machine screws. This bar then mounts the PCB to some kind of enclosure or panel. The metal bar stiffens the PCB and removes a significant amount of heat to the cabinet or back panel. You would need to try your configuration to see if the Rth is low enough for this to work.
The bad news is you can't run tracks on the reverse side where the bar is located. We used this idea on a product and it allowed us to replace 2512 parts with 2010 parts saving space and costs. -- Mike Salish ____________________________________________________________ You are subscribed to the PEDA discussion forum To Post messages: mailto:[email protected] Unsubscribe and Other Options: http://techservinc.com/mailman/listinfo/peda_techservinc.com Browse or Search Old Archives (2001-2004): http://www.mail-archive.com/[email protected] Browse or Search Current Archives (2004-Current): http://www.mail-archive.com/[email protected]
