NXP have produced the SSL2101 can be directly connected to rectified 
mains power.  As the actual chips Vcc range is 8.5 - 40V, I'm sure 
this should have other uses as it is really nothing but a fancy SMPS.

http://www.nxp.com/acrobat_download/datasheets/SSL2101_1.pdf
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cdb,   13/03/2009
 
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colin@btech-online.co.uk

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