Re: [CAD_CAM_EDM_DRO] Re: lm317

Entering this thread a bit late, so I may be missing something, but 24V --> 5V
is a significant drop, and you'll generate a LOT of heat that needs to be
heatsunk, and may cause problems. You can either split the regulator into 2
parts such as 24V --> 15V --> 5V, or why not just use a switching regulator?

Even if you don't care about the efficiency of the switcher, you'll save
yourself a lot of heatsinking hassles.

Cheers,
-Neil.


On Sunday 06 June 2004 01:30 pm, afogassa scribbled:

> > Hi All,
> > I need to get 24 and 5v from the same transformer,I had in mind
> that
> > I could set one lm317 to 24v. than feed another lm317 and set that
> to
> > 5v. The 24v would feed a relay card and the 5v a pic 18c452
> > I've searched on the lm317 application notes and haven't found any
> > thing like it,will it work?
> >
> > Thank's
> > fogassa
>
> Thank you all, Yup it gives up a lot heat, I'll change the design and
> use a center tap trans. or a double output trans, the only problem is
> to have a new photoplot and boards made.