+/-12V 5A, 100W filterless class D
 

Is it possible to get

Is it possible to get 100W of power with a 17-0-17V, 5A supply (obtained from 12-0-12 tfr) in fullbridge configuration?

Load impedance = 4 ohms

The intended circuit looks like this. Does anyone see any problems? Power supply is well capable of 5A.

its not possible to get 100w in any way with 17v into 4R

So how much is it going to be max?
50W?

i need to get 250W (at least 100W worst) into 4E. I have 25-0-25 3A tfr. Does it seem possible in anyway?

even if you bridge you might get as high as ~30V peak into 4ohm which will still not be 100W into 4 ohms.

So what power suppply should i use to get
a) 100W into 4 ohms?
and b) 250W into 4 ohms?
and how many amperes?

30V peak is actually a little more than 100W into 4 ohms. Prms=Vpeak^2/(2*R)=112.5 W. If somebody doesn't know these elementary calculations, then I suggest him not to build any amplifiers.

But for those who are capable of designing something (and have good soldering skill), I recommend TAS5162 or similar power stage for this power level.