I have the following power supply requirements: 24VAC input power (20 to 27 VAC) Output #1: 5VDC @ 500mA Output #2: 20VDC @ 150mA The design requires isolation of the ground from primary to secondary. (The 24VAC input has one lead at earth ground and the output circuit also has the low side connected to earth ground. Therefore, if the grounds are connected the full wave retifier is defeated.) Further, I do not want a seperate winding for the regulator. Could you recommend a design that would meet these requirements?