+/-12V 5A, 100W filterless class D

[newvirus2008]

Is it possible to get

[newvirus2008]

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

[newvirus2008]

Load impedance = 4 ohms

[newvirus2008]

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

[luka]

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

[newvirus2008]

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

[newvirus2008]

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

[tangmonster]

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

[newvirus2008]

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

[Pafi]

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.