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newvirus2008 11th September 2010 11:39 AM

+/-12V 5A, 100W filterless class D
Is it possible to get

newvirus2008 12th September 2010 07:16 AM

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 12th September 2010 07:18 AM

Load impedance = 4 ohms

newvirus2008 12th September 2010 08:09 AM

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

luka 12th September 2010 08:15 AM

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

newvirus2008 12th September 2010 08:21 AM

So how much is it going to be max?

newvirus2008 12th September 2010 08:24 AM

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 12th September 2010 08:25 AM

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

newvirus2008 12th September 2010 08:52 AM

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 12th September 2010 09:29 AM

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.

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