I too am making an ATX power supply and at the moment im going with the following specs:

Input:

8 - 14 volts DC, non regulated

Outputs:

12v @ 2.2 amps > 75% efficient @ 12 volts in

3.3v @ 5 amps > 80% efficient @ 12 volts in

5v @ 4.8 amps > 85% efficient @ 12 volts in

-12 volts @ 0.1 amps

-5 volts @ 0.1 amps

Power output approx = 67.9 Watts

Power input = 81.48 Watts (80% efficiency at rated load.)

Typicial Full load Input Current = 6.79 Amps @ 12 volts.

Plus I would make it compatible with the ATX standard ie. all atx signals (power good, power standby, and power on)

If I had double sided plated boards built and the whole thing was about 3.8" by 2.5" by 2" with an aluminum heatsink/casing, would people be interested in buying one? How much would anyone pay?

I was also thinking of having the -5 voltage be an adjustable one so that if you didn't need the -5 and you needed say, -8 you could do it.

What do ya think?

Jeff_

Input:

8 - 14 volts DC, non regulated

Outputs:

12v @ 2.2 amps > 75% efficient @ 12 volts in

3.3v @ 5 amps > 80% efficient @ 12 volts in

5v @ 4.8 amps > 85% efficient @ 12 volts in

-12 volts @ 0.1 amps

-5 volts @ 0.1 amps

Power output approx = 67.9 Watts

Power input = 81.48 Watts (80% efficiency at rated load.)

Typicial Full load Input Current = 6.79 Amps @ 12 volts.

Plus I would make it compatible with the ATX standard ie. all atx signals (power good, power standby, and power on)

If I had double sided plated boards built and the whole thing was about 3.8" by 2.5" by 2" with an aluminum heatsink/casing, would people be interested in buying one? How much would anyone pay?

I was also thinking of having the -5 voltage be an adjustable one so that if you didn't need the -5 and you needed say, -8 you could do it.

What do ya think?

Jeff_

## Comment