ucd 25 watts to 1200 watts using 2 mosfets - Page 3

kanon · 8th May 2010, 04:39 AM

esperaba ver tu comentario eva....

otu pafi.. regars..

qsa · 12:48 PM

Hello,

Does somebody have circuit description ?

How about Short Circuit - Over Current Protection and turn On Delay / Fast off for speakers in this Design ? otherwise I can use relay for turn On Delay / Fast off for speakers

1250W without Short Circuit and Over Current Protection in catastrophic user failure makes a good firework.

does this design working with heavy 2 OHM loads too?

Im interested to make DIY Stereo/2 Channel PCB boards 220 x 80 mm from this Class D Design

including Balanced XLR IN and Triac Crowbar DC Protection for HI-FI or PA

Any idea or comments are welcome

regards

Macleod · 10th May 2010, 04:58 PM

Quote:

Originally Posted by ejtagle

As a sidenote, the amp is of the self oscillating class D type, based on the UCD technology and the associated patent, so, the amp itself is just for personal use. No commercial use is allowed for it

Really?

I read on NXP website that UCD use for commercial use was ok as long as NXP power MOSFET were used.

From what I see here, there are still some commercial use with MOSFET from competition?

81bas · 10th May 2010, 05:48 PM

Quote:

Originally Posted by Macleod

Really?

I read on NXP website that UCD use for commercial use was ok as long as NXP power MOSFET were used.

From what I see here, there are still some commercial use with MOSFET from competition?

Can you please provide a link to the NXP site with this info?
I think it was in this way as you said while Bruno had worked for Philips. Now he is at Hypex and owns UCD patent exclusively, as I heard...

Macleod · 11th May 2010, 08:59 AM

I can't find it right now. I read that about one year ago.

On UM10155, it is still written that patent is owned by philips, no update since 2006.

opor · 11th May 2010, 12:00 PM

I have try several type of class D amp with IRFP250 fets. But I have got the same problems. It is hot so quikly. So what about this one?

TicksNLeeches · 11th May 2010, 02:19 PM

Quote:

Originally Posted by opor

I have try several type of class D amp with IRFP250 fets. But I have got the same problems. It is hot so quikly. So what about this one?

Boggles the mind.. maybe BJT's are better?

andrewlebon · 12th May 2010, 01:11 AM

hi diyers
greetings can this circuit work are there any flaws
thanking you
andrew lebon

theAnonymous1 · 12th May 2010, 03:25 AM

Quote:

Originally Posted by andrewlebon

hi diyers
greetings can this circuit work are there any flaws
thanking you
andrew lebon

Are you serious? Did you bother reading any of the other posts in this thread?

Quote:

Originally Posted by tacatomon

Is a great amp!!! Really clear sound when properly assemble with quality components.

Quote:

Originally Posted by Bushell

The amplifier works. And does it very well.

ruferto · 12th May 2010, 02:32 PM

hello, i have an 150va 2x60v transf. is it any good for an class d amp. or should throw way. sorry for the question.

8th May 2010, 04:39 AM	#21
kanon diyAudio Member Join Date: Oct 2008	evaaaaaaaaaaa or pafiii esperaba ver tu comentario eva.... otu pafi.. regars..

10th May 2010, 12:34 PM	#22
qsa diyAudio Member Join Date: May 2007	Hello, Does somebody have circuit description ? How about Short Circuit - Over Current Protection and turn On Delay / Fast off for speakers in this Design ? otherwise I can use relay for turn On Delay / Fast off for speakers 1250W without Short Circuit and Over Current Protection in catastrophic user failure makes a good firework. does this design working with heavy 2 OHM loads too? Im interested to make DIY Stereo/2 Channel PCB boards 220 x 80 mm from this Class D Design including Balanced XLR IN and Triac Crowbar DC Protection for HI-FI or PA Any idea or comments are welcome regards Last edited by qsa; 10th May 2010 at 12:48 PM.

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11th May 2010, 08:59 AM	#25
Macleod diyAudio Member Join Date: Dec 2008 Location: Toulouse, south of France	I can't find it right now. I read that about one year ago. On UM10155, it is still written that patent is owned by philips, no update since 2006.

11th May 2010, 12:00 PM	#26
opor diyAudio Member Join Date: Nov 2005	I have try several type of class D amp with IRFP250 fets. But I have got the same problems. It is hot so quikly. So what about this one?

12th May 2010, 01:11 AM	#28
andrewlebon diyAudio Member Join Date: Feb 2008	hi diyers greetings can this circuit work are there any flaws thanking you andrew lebon

12th May 2010, 02:32 PM	#30
ruferto diyAudio Member Join Date: Oct 2004	hello, i have an 150va 2x60v transf. is it any good for an class d amp. or should throw way. sorry for the question.