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Class D Switching Power Amplifiers and Power D/A conversion

UcD like topology amp.
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Old 25th February 2012, 07:43 AM   #231
Whortless is offline Whortless  Turkey
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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
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Old 29th February 2012, 06:46 AM   #232
Hari W is offline Hari W  Indonesia
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hi, bender i can't open your file, could you sent to my email please:
hari_wibowo_jmb@yahoo.com

thankyou verimuch.
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Old 21st March 2012, 03:55 AM   #233
Aucosticraft is offline Aucosticraft  India
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Quote:
Originally Posted by Bender.ru View Post
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.
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Old 25th June 2012, 09:09 PM   #234
Whortless is offline Whortless  Turkey
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Default Last situation of my amp

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
Attached Images
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Old 25th June 2012, 09:29 PM   #235
luka is offline luka  Slovenia
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UcD like topology amp.
man, they came out very very good, is it playing yet?
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Old 25th June 2012, 10:05 PM   #236
Whortless is offline Whortless  Turkey
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Originally Posted by luka View Post
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.
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Old 26th June 2012, 12:04 AM   #237
dudaindc is offline dudaindc  United States
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Quote:
Originally Posted by Whortless View Post
...
I hope you all like it.
...
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Old 26th June 2012, 07:32 AM   #238
Baldin is offline Baldin  Denmark
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Looks really good. Is it an isolated smps on the board as well?
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Old 26th June 2012, 12:25 PM   #239
Whortless is offline Whortless  Turkey
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Looks really good. Is it an isolated smps on the board as well?
Yes,sure it is!
)
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Old 17th October 2012, 08:48 PM   #240
kvazi13 is offline kvazi13
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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)
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