UcD like topology amp. - Page 24

Whortless · 25th February 2012, 07:43 AM

Hi All,

After some measurements, I found the reason why one channel oscillating at a lower frequency. The reason is the LM311 itself. Interestingly it is ~100ns slow than the others. And hence replacing it with a new one solve all the problems. Now all the channels running around 400-430kHz. The idling loss for SMPS itself is around 2Ws(none of the channels connected) and the idling loss for two Channels around 5Ws. It looks the channels not fighting to eachother in the sw frequency means. So the amp is fine just now and i am going on to complete it up to final version. I have to build output protection relay board and fit it into the place. Then I can start tests at idle, mid and full power.

Chreers

Hari W · 29th February 2012, 06:46 AM

hi, bender i can't open your file, could you sent to my email please:
hari_wibowo_jmb@yahoo.com

thankyou verimuch.

Aucosticraft · 21st March 2012, 03:55 AM

Quote:

Originally Posted by Bender.ru

Hi all.
Here is light version amp docs & pcb.
Please connect me if you find bugs.

Cakeamp.zip
(link will be available for 30 days)

http://rapidshare.com/files/107380802/Cakeamp.zip.html
(i dont know how long it will be available

)

Bender
The Specs, and the compact looks like, more than for a DIYers. Thanks for sharing.

If your tool can generate BOM with footprints of components. Can I request you to post it here. So that I can check if its available for me to buy and built one for myself. I am very much eager to hear this.

Whortless · 25th June 2012, 09:09 PM

Hi all,

I think there are several questions around and there are many others similar to the amp discussed here. Anyway, I started to do the amp below for a very long time ago. And now it went into a good PCB. The entire PCB is 105um Cu thickness and i had it made from a China manufacturer (hell, it was a difficult process to get them). The photos below are nearly completed amp but, still 3 auxiliary PCB are missing. They will be available soon.

I hope you all like it.
Best wishes

luka · 25th June 2012, 09:29 PM

man, they came out very very good, is it playing yet?

Whortless · 25th June 2012, 10:05 PM

Quote:

Originally Posted by luka

man, they came out very very good, is it playing yet?

Sub channels playing! others need the xformer to be mounted! The transformer is nearly ready but need some additional windings.

dudaindc · 26th June 2012, 12:04 AM

Quote:

Originally Posted by Whortless

...
I hope you all like it.
...

Baldin · 26th June 2012, 07:32 AM

Looks really good. Is it an isolated smps on the board as well?

Whortless · 26th June 2012, 12:25 PM

Quote:

Originally Posted by Baldin

Looks really good. Is it an isolated smps on the board as well?

Yes,sure it is!

)

kvazi13 · 17th October 2012, 08:48 PM

hello Whortless
good job1 i like it)
but same question to you..
do U synchronized all your drivers IRS???
how u do it, if yes (sorry for my english)

25th June 2012, 09:29 PM	#235
luka diyAudio Member Join Date: Sep 2005 Location: in Slovenia :)	man, they came out very very good, is it playing yet? __________________ home page @ http://www.classdaudio.tk/ @ 24/7 all year long I FEEL SLOVENIA

26th June 2012, 07:32 AM	#238
Baldin diyAudio Member Join Date: Jan 2005 Location: Copenhagen	Looks really good. Is it an isolated smps on the board as well? __________________ Visit www.sensibleaudio.dk or read latest news on Baldin's Blog

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25th February 2012, 07:43 AM	#231
Whortless diyAudio Member Join Date: Nov 2005 Location: Kocaeli,Turkey	Hi All, After some measurements, I found the reason why one channel oscillating at a lower frequency. The reason is the LM311 itself. Interestingly it is ~100ns slow than the others. And hence replacing it with a new one solve all the problems. Now all the channels running around 400-430kHz. The idling loss for SMPS itself is around 2Ws(none of the channels connected) and the idling loss for two Channels around 5Ws. It looks the channels not fighting to eachother in the sw frequency means. So the amp is fine just now and i am going on to complete it up to final version. I have to build output protection relay board and fit it into the place. Then I can start tests at idle, mid and full power. Chreers

29th February 2012, 06:46 AM	#232
Hari W diyAudio Member Join Date: Dec 2006 Location: Jambi	hi, bender i can't open your file, could you sent to my email please: hari_wibowo_jmb@yahoo.com thankyou verimuch.

17th October 2012, 08:48 PM	#240
kvazi13 diyAudio Member Join Date: Dec 2009	hello Whortless good job1 i like it) but same question to you.. do U synchronized all your drivers IRS??? how u do it, if yes (sorry for my english)