It seems that the best way to get a universal input power supply
is to go to a switcher.  There are now a variety of "wall wart" universal
input switchers.  These are nice in that they already have all the safety
approvals and EMC approvals.
        Several companies are now making flyback switcher chips that
include the controller and power FET on one chip.
        Here are a few places to check...
<ul>
<li>Power Supplies</li>
    <ul>
      <li><a href="http://www.astrodyne.com">Astrodyne</a> - Switchers
and DC to DC converters</li>
      <li><a href="http://www.autec.com">Autec</a> - Switchers including
power supply used in DRC190</li>
      <li><a href="http://www.aultinc.com">Ault</a> - Extensive line of
international wall warts.  Available
        from Scott Partlow at Powerspec at +1 408 748 9900 x229</li>
      <li>CET Technology - phone +1 603 894 6100 - Wallmount, desktop,
linear and switcher</li>
      <li><a href="http://www.elpac.com">Elpac</a> - Universal input AC
adaptors and more</li>
      <li><a href="http://www.friwo.com">Friwo</a> - AC/DC wall adaptors,
including international.
        Pages list part numbers for DC output wall warts for US, Euro and
UK use.  The MultiPower Plug 10
        has interchangeable input plugs for US, Japan, Europe, UK, and
Australia.</li>
      <li><a href="http://www.gpelectronics.com">Golden Pacific</a> -
External switchers</li>
      <li><a href="http://www.jeromeindustries.com">Jerome Industries</a>
- Various, including wall wart</li>
      <li><a href="http://www.newportcomps.com">Newport Components</a> -
DC to DC converters</li>
      <li><a href="http://www.operatingtech.com">Operating Technical
Electronics<a/> - Universal input switchers, including external</li>
      <li><a href="http://www.phihongusa.com">Phihong USA</a> - Universal
input switching wall warts, and more</li>
      <li><a href="http://www.eemonline.com/pillarind">Pillar
Industries</a> - AC/DC adaptors, including international</li>
      <li><a href="http://www.rodaletech.com">Rodale</a> - Wall warts,
transformers, power supplies</li>
      <li><a href="http://www.shogyo.com">Shogyo</a> - Transformers and
wall warts</li>
      <li><a href="http://www.total-power.com">Total Power
International</a> - Wall warts and table top</li>
      <li><a href="http://www.xentek.com">Xentek</a></li>
    </ul>
 <li>Semiconductors</li>
    <ul>
     <li><a href="http://www.powerint.com">Power Integrations</a> -
Switching power chips</li>
       <li><a href="http://www.st.com">STMicro</a> - SGS
        <ul>
          <li><a
href="http://www.st.com/stonline/books/pdf/docs/5137.pdf">Viper100</a> -
100W SMPS chip</li>
        </ul>
</ul>

Harold





Harold Hallikainen
harold@hallikainen.com
Hallikainen & Friends, Inc.
See the FCC Rules at http://hallikainen.com/FccRules and comments filed
in LPFM proceeding at http://hallikainen.com/lpfm


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