Re: Ac to DC without transformer

From: Paul Mathews (optoeng_at_pioneernet.net)
Date: 02/10/05 

Date: 10 Feb 2005 08:42:46 -0800

At these power levels (1/2 Watt), switchers aren't much smaller than
linear transformers. If ALL of your circuitry is isolated properly,
you can consider using series capacitance instead of a transformer, but
you'll need about 3uF, and properly rated capacitor(s) could also be
about as large as a 1VA transformer. You might want to put your
energies into looking for the smallest possible linear transformer,
especially if your product has any exposed metal.
Paul Mathews

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