View Single Post
Old
  (#46)
What's_nitro?
Soldermaster Extraordinaire
 
What's_nitro?'s Avatar
 
Offline
Posts: 4,529
Join Date: Apr 2007
Location: Plymouth, MA, USA
04.19.2010, 07:06 PM

Quote:
Originally Posted by BrianG View Post
Isolation like that could be done, but the diodes would:

- Be VERY beefy. A diode capable of handling 15+ amps each would be large indeed.

- Have a low forward voltage drop. Most diodes have a drop of 0.7v. Schottkey diodes can get as low as ~0.3v.

- Must be mounted on a heatsink. Even a 0.3v drop diode will dissipate 4.5w @ 15A.

- Expensive.
Ok, what about these?

$3.99 for 20 diodes w/ free shipping...

5 diodes needed for full PS output per pad. 0.5V drop at full load = 1.5W per diode max. Use 10 diodes per pad, so 0.75W dissipated per diode max (probably less since each diode would see 1.5A max load). A diode that size should be able to dissipate that amount of power by itself, or just mount them all under the PS fan.

It may be a bit clunky looking, but it would fit into the PS case no problem.
   
Reply With Quote