ucd 25 watts to 1200 watts using 2 mosfets - Page 63 - 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 30th November 2010, 02:22 PM   #621
stewin is offline stewin  Kenya
diyAudio Member
 
Join Date: Jul 2007
hi guyz about the 106-26 core i managed to add the 1mm gap with a hacksaw . my supply is +/- 70vlts the core gets hot but i've been playing it for like 7 hours .despite of the heat every thing is ok mosfets irfp260 are warm but my load is 4ohms and i'm using a very small heatsink .

but i've noted if i increase the gap to 3mm distortion and crackling in high frequency at high volume disappears ican't explain it scientifically but it works great here are my layout and schema
Attached Images
File Type: png ucd 25 - 1200.png (73.4 KB, 1299 views)
File Type: png ucd 25 - 1200 schema .png (15.8 KB, 1293 views)
  Reply With Quote
Old 30th November 2010, 02:44 PM   #622
diyAudio Member
 
andrewlebon's Avatar
 
Join Date: Feb 2008
hi stewin
greetings can you share pcb pattern for this amplifier failed once
want to make it again to good to miss out
thanking you
andrew lebon
  Reply With Quote
Old 30th November 2010, 04:27 PM   #623
diyAudio Member
 
Join Date: Apr 2010
Location: Nis, Serbia
Ok, thank you guys

Now I'm understanding this about gap and number of turns

Still, I will use core with 1mm gap and 23 turns, like all of you said, only I waiting
PCB

P.S I read somewhere about T106-26, that it has 40+10 degrees with 12 turn of 1,85mm wire (15uH) and that's totaly normal
  Reply With Quote
Old 30th November 2010, 05:11 PM   #624
Pafi is offline Pafi  Hungary
diyAudio Member
 
Join Date: May 2004
Location: Budapest
Quote:
Originally Posted by darkfenriz View Post
Dzony988

Why did you make a gap in a powder toroid?
Because it was told. :-)

To decrease flux change rate, therefore decrease heat. And to achieve higher saturation current.

Quote:
Originally Posted by Dzony988
P.S I read somewhere about T106-26, that it has 40+10 degrees with 12 turn of 1,85mm wire (15uH) and that's totaly normal
OK, but with what supply voltage? I guess much less than 40 V.
  Reply With Quote
Old 30th November 2010, 07:18 PM   #625
stewin is offline stewin  Kenya
diyAudio Member
 
Join Date: Jul 2007
Quote:
Originally Posted by andrewlebon View Post
hi stewin
greetings can you share pcb pattern for this amplifier failed once
want to make it again to good to miss out
thanking you
andrew lebon
here is my plot but i have another which is stereo and uses droper resistor instead of transistors to power the lm311 .. pls note if you are going to use +/-70vlts change the small transistors regulating power of lm 311, from(2n5401,2n5551 ) to (bd140,bd139)respectively "remember to interchange their pins"and mount them on a small sink . not to forget also to interchange the lin and hin pins of ir2110 . "i was trying to drive the amp in an opposite phase in order to bridge it easily" , never got the time to change it but i,ve managed in my another board.

thanks again andrew lebon 4 this wonderfull thread GOD bless you .
Attached Files
File Type: pdf ucd ir2110 schematic.pdf (28.1 KB, 863 views)
File Type: pdf ucd ir2110 top .pdf (149.1 KB, 817 views)
File Type: pdf ucd ir2110 bottom .pdf (144.2 KB, 695 views)
File Type: pdf ucd ir2110 components .pdf (25.3 KB, 568 views)
  Reply With Quote
Old 1st December 2010, 06:42 AM   #626
diyAudio Member
 
Join Date: Sep 2009
Location: Romania,Calarasi
Send a message via Yahoo to ionutzxpo
Dzony988
because my toroid was not an iron powder one ,looks exactlly as yours but is not iron powder i have iron powder T130-2 from micrometals I bought from here
Kits And Parts Store I do not know if I'm allowed to post
I apologize if I did not
  Reply With Quote
Old 1st December 2010, 10:17 PM   #627
diyAudio Member
 
Join Date: Apr 2010
Location: Nis, Serbia
Ok, I'm understanding my friend

What do you suggest I use, iron powder 15turns without gap (20uH) T106-26 or 23 turns with 1mm gap (17uH) t106-26

Thanks to all
Regards, Nikola
  Reply With Quote
Old 2nd December 2010, 09:36 AM   #628
Pafi is offline Pafi  Hungary
diyAudio Member
 
Join Date: May 2004
Location: Budapest
Quote:
Originally Posted by ionutzxpo View Post
Dzony988
because my toroid was not an iron powder one ,looks exactlly as yours but is not iron powder i have iron powder T130-2 from micrometals

Iron powder, not iron powder, what are you talking about?
  Reply With Quote
Old 2nd December 2010, 10:22 AM   #629
akraj is offline akraj  Bangladesh
diyAudio Member
 
Join Date: Nov 2010
Quote:
Originally Posted by stewin View Post
here is my plot but i have another which is stereo and uses droper resistor instead of transistors to power the lm311 .. pls note if you are going to use +/-70vlts change the small transistors regulating power of lm 311, from(2n5401,2n5551 ) to (bd140,bd139)respectively "remember to interchange their pins"and mount them on a small sink . not to forget also to interchange the lin and hin pins of ir2110 . "i was trying to drive the amp in an opposite phase in order to bridge it easily" , never got the time to change it but i,ve managed in my another board.

thanks again andrew lebon 4 this wonderfull thread GOD bless you .

Hi Stewin:

Thanks for sharing the design! What is the maximum voltage can be applied and what will be output (Watt)?

Thanks
Raj
  Reply With Quote
Old 2nd December 2010, 10:29 AM   #630
diyAudio Member
 
Ouroboros's Avatar
 
Join Date: Dec 2003
Location: Nottingham UK
Perhaps it was a ferrite toroid, not iron powder? I am quite a fan of the white ferrite 'Polo Mint' gapped toroids from Ferroxcube, but wish that RS or Farnell or similar stocked them.
  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 62 28th June 2014 05:02 PM
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 04:49 PM.


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