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Old 8th May 2010, 04:39 AM   #21
kanon is offline kanon  Mexico
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Default evaaaaaaaaaaa or pafiii

esperaba ver tu comentario eva.... otu pafi.. regars..
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Old 10th May 2010, 12:34 PM   #22
qsa is offline qsa  Germany
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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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Old 10th May 2010, 04:58 PM   #23
Macleod is offline Macleod  France
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Quote:
Originally Posted by ejtagle View Post
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?
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Old 10th May 2010, 05:48 PM   #24
81bas is offline 81bas  Germany
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Originally Posted by Macleod View Post
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...
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Old 11th May 2010, 08:59 AM   #25
Macleod is offline Macleod  France
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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.
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Old 11th May 2010, 12:00 PM   #26
opor is offline opor  Thailand
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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?
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Old 11th May 2010, 02:19 PM   #27
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Quote:
Originally Posted by opor View Post
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?
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Old 12th May 2010, 01:11 AM   #28
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hi diyers
greetings can this circuit work are there any flaws
thanking you
andrew lebon
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Old 12th May 2010, 03:25 AM   #29
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Quote:
Originally Posted by andrewlebon View Post
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 View Post
Is a great amp!!! Really clear sound when properly assemble with quality components.
Quote:
Originally Posted by Bushell View Post
The amplifier works. And does it very well.
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Old 12th May 2010, 02:32 PM   #30
ruferto is offline ruferto  Portugal
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hello, i have an 150va 2x60v transf. is it any good for an class d amp. or should throw way. sorry for the question.
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