Homebrew PCBs

Hi Randy,

Here are a few links for you. It's not that trivial, but there are a few
rules of thumb that you can use. I have been involved with design switching
supplies for high power car stereos since 1982, so email me directly if you
can't find what your'e looking for.

http://www.powerdesigners.com/
http://www.ogradyeng.com/Pages/frameset2.html
http://www.powersimtech.com/download.html
http://www.geocities.com/genomeuk/
http://www.chipcenter.com/power/powparch.htm
http://www.national.com/appinfo/power/
http://www.ee.uts.edu.au/~venkat/pe_html/peintro.htm
http://www.sonic.net/~sjl/power.html
http://www.smpstech.com/tutorial/t02top.htm
http://www.powersupplies.net/
http://www.smpstech.com/websites.htm
http://www.fgl.com/pwrapps.htm
http://www.mag-inc.com/

Have fun......

Regards,
Lukas Louw
louw1@...


>
> Hi:
> I know this is off the pcb topic but I was wondering if anyone on this
list knew how to design transformers or where to look to find this
information out. I am trying to build a 500 watt 100khz switching power
supply that will bring 12volts to 60 volts. I understand the concept of
turns ratio but my question is how do I treat the primary of the
transformer? Do I treat it as merely an inductor whose value I would need to
calculate? I was also wondering about the magnetic selection of a core. How
much permeability can I have before I saturate the core using a given power
level?
> Thanks!
> -=Randy Knutson



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