ucd 25 watts to 1200 watts using 2 mosfets - Page 15 - diyAudio
Go Back   Home > Forums > Amplifiers > Class D

Class D Switching Power Amplifiers and Power D/A conversion

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 19th July 2010, 02:18 PM   #141
lycanlk is offline lycanlk  Sri Lanka
diyAudio Member
 
Join Date: Sep 2009
Default Hi luka,

Quote:
Originally Posted by luka View Post
what? last guy said it doesn't. Do you really want to find that for yourself too?

look at post #95 to #105..

and I have gone through a couple of your threads, Luka.. you are very good in this subject so please share what you have with this

regards,
Lycanlk
  Reply With Quote
Old 19th July 2010, 02:26 PM   #142
luka is offline luka  Slovenia
diyAudio Member
 
luka's Avatar
 
Join Date: Sep 2005
Location: in Slovenia :)
Send a message via Skype™ to luka
its not the schematic that is the problem(probably), its the board, you can make Damp to work just with any kind of build and it will work at low powers... but at high is where you can have problems...

Mine work ok, for low volumes, up to say 100w... but board was just too bad for any higher power, and it didn't matter if I had 2R to 8R loads, or +/-30 to 60v for supply... I think this is the same there

If not prove it and help andrewlebon
__________________
home page @ http://www.classdaudio.tk/ @ 24/7 all year long
I FEEL SLOVENIA
  Reply With Quote
Old 19th July 2010, 02:52 PM   #143
diyAudio Member
 
andrewlebon's Avatar
 
Join Date: Feb 2008
hi savu
greetings want to ask you if the schematic really works if the circuit is ok please tell me as i am attempting d class for first time not very sure why no
output
1 voltage plus70 0 70 negative used series bulb
2 modified it like opor said changed ir 2110 4 times no one seems to have tested it at full voltage even read all pages at foros de electronica
3 any voltage readings of your amp
can you help me
thanking you
andrew lebon
  Reply With Quote
Old 19th July 2010, 02:58 PM   #144
diyAudio Member
 
andrewlebon's Avatar
 
Join Date: Feb 2008
hi luka
greetings have you made this amp if so what voltage did you feed it
thank you for your thought very kind of you
thanking you
andrew lebon
  Reply With Quote
Old 19th July 2010, 02:59 PM   #145
luka is offline luka  Slovenia
diyAudio Member
 
luka's Avatar
 
Join Date: Sep 2005
Location: in Slovenia :)
Send a message via Skype™ to luka
no not this one, "my" is diffrent
__________________
home page @ http://www.classdaudio.tk/ @ 24/7 all year long
I FEEL SLOVENIA
  Reply With Quote
Old 19th July 2010, 03:31 PM   #146
lycanlk is offline lycanlk  Sri Lanka
diyAudio Member
 
Join Date: Sep 2009
Default Ok i'm gonna build with my own design..

I'm not a good PCB designer.. anyway it is worth to try building this amp as it is so simple.. and thanks for the idea dear Luka.. if the schematic is fine then I can check out with different layouts..

I'll keep the space for any pro designers to make it while i'm trying my own..

regards,
Lycanlk
  Reply With Quote
Old 19th July 2010, 04:52 PM   #147
savu is offline savu  Romania
diyAudio Member
 
savu's Avatar
 
Join Date: Feb 2007
Location: Cluj - Napoca
Send a message via MSN to savu Send a message via Yahoo to savu
Hello all,

A friend of mine built this amp:
first try was "up in smoke"
he redesigned the PCB and built it again.
it works but it has some distortion problems when connected to anything else but a portable MP3 player.
the voltage is only +/- 28Vdc because i have to build him a smps and i haven't kept my part of the deal because of lack of time.
Now i have the time to make the smps and i also intend to make this with smd components and smd switching fets. the link below is my thread using rasmir's schematic.
PQFN 5X6mm Packaged N channel Power Mosfet in ClassD ...
__________________
1'st rule of chess:
The only way to get smarter is by playing a smarter opponent.
  Reply With Quote
Old 19th July 2010, 05:16 PM   #148
diyAudio Member
 
Join Date: Apr 2009
Location: In a IRFP4229
Here are some technical data given by the author on the design of the amplifier UCD.

Distortion 0.01% to 50% power (for a 600W amplifier, a maximum of 1200W).
Low distortion even if it uses less power. And the measurement of distortion that I give is for any frequency in the audio band, from 20Hz to 20kHz! (Cleared, because many distortion amplifiers are only 1kHz, 10kHz but is much larger. It is not the case with this amp)
Output Noise: 30uV approx.
Output impedance: Of the order of 20 milliohms, or better (depending on the mosfets used)
Power Bandwidth: 0 to 23kHz (-3db) (that is to get maximum power, but the amplifier reaches much higher frequencies, just not at full power)
Voltage gain: Simply, reaches maximum power 2Vpp input signal.
Supply ripple rejection: Better than 65dB (again, depends on the components, assembly, etc)
Efficiency: Close to 92% or even less (although, again dependent on the mosfets. Probably better than the 92% for smaller powers to 1000W)
The IMD (intermodulation product is also low, with 2 modulating 19kHz and 20kHz tones, intermodulation spurious signals are smaller 80db ...

Greetings!
__________________
See You On The Other Side
  Reply With Quote
Old 19th July 2010, 08:42 PM   #149
Pafi is offline Pafi  Hungary
diyAudio Member
 
Join Date: May 2004
Location: Budapest
To make it clear: are these the specifications of the original UcD made by Bruno Putzeys?
  Reply With Quote
Old 19th July 2010, 09:13 PM   #150
Banned
 
Join Date: Jan 2005
If it is, it have nothing what so ever to do with this design depicted in this thread, which aint a ucd what so ever. Its just another class d design by a diyer on a forum.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Philips 40/25/15 watts amplifier with Universal preamplifier circuit. renjiish Solid State 64 28th July 2014 11:33 AM
Decibel Watts VS Watts ? fivestring Solid State 11 1st April 2009 01:08 PM
AMP1-B: why only 25 watts @8ohms? theAnonymous1 Class D 10 15th August 2005 06:55 PM
Sound quality of amps at 0.3 watts vs @ typical 5 watts rick57 Solid State 2 26th March 2005 06:25 AM
Need 2 watts Vivek Everything Else 4 17th July 2003 08:29 AM


New To Site? Need Help?

All times are GMT. The time now is 03:33 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2