> Depending what total current at 12v you need
> it shouldn't be too hard. ie you did say LOW
> current. I'm not sure if it's suitable but my
> preference would be to do away with opto to
> improve reliability, and no feedback winding
> for lower cost and make a constant power mains
> SMPS with a two winding inductor. This can be
> VERY simple, 2 transistors and a few discretes.
>

Can you point me to a example circuit ?

At the moment I'm thinking about using the MAX5022, this does however need a
small transformer and opto ( these often fail in tv psu's). But its small,
cheap, works over a wide input range and has overvoltage and current
protection.

Steve

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