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Old 27th February 2012, 06:28 PM   #81
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Ok I correct all errors that I made in SCH file and I think that is now ok

Here is image file:
http://www.dodaj.rs/f/1Z/bJ/3mXEm1Hs/sch1.png

The resistence of 2R7 need to be 5W wire type?

I have one question for pinkmouse, "That's just a workaround to aid laying out a star ground, if you look at the pcb you can see what I mean." so I need to conect CHNGND to PGND with jumper wire in the middle off PGND1 and PGND2 pad?

Thanks from Serbia
Dragan
Belgrade
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Old 27th February 2012, 07:20 PM   #82
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You can do it that way, or if you have a single star ground somewhere else in your enclosure, run them separately back to that.
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Old 27th February 2012, 07:39 PM   #83
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Default Altium Designer SS PCB LM4780

Here is my version of bridged LM4780 Single side PCB
Attached Images
File Type: png Bottom.PNG (101.2 KB, 442 views)
File Type: png Top.PNG (92.0 KB, 427 views)
File Type: png PCB.PNG (112.2 KB, 435 views)
Attached Files
File Type: pdf LM4780.pdf (142.1 KB, 137 views)
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Old 28th February 2012, 06:25 PM   #84
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Default tnx

ritvarsrizikovs Great PCB.

pinkmouse

Now I understand what you saing about grounding You are talking about all ground need to be connected to chassiss in one point right? I read about that on this link:
Power Supply & Wiring
I think now the schematic and values are ok and I can start with building this amp. I got 3 peaces of LM4780 and torid transformmer 2x20V 6A so let the building begin
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Old 16th April 2012, 01:23 AM   #85
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Hello again

First of all big thanks to pinkmouse for nice PCB that he share.

Here is my work in progrese:

Click the image to open in full size.
http://www.dodaj.rs/f/2W/JC/3xW0qdTk/draganche0234.jpg

Click the image to open in full size.
http://www.dodaj.rs/f/1l/MW/4uFebWLi/draganche0238.jpg

Click the image to open in full size.
http://www.dodaj.rs/f/29/vW/3yl4V6cH/draganche0243.jpg

Click the image to open in full size.
http://www.dodaj.rs/f/n/n7/28E9S2Io/draganche0244.jpg

Click the image to open in full size.
http://www.dodaj.rs/f/7/j9/1eyOxUAL/draganche0245.jpg

Click the image to open in full size.
http://www.dodaj.rs/f/e/mo/4xga1mJJ/draganche0246.jpg

To be continued...

Last edited by tesla017; 16th April 2012 at 01:26 AM.
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Old 16th April 2012, 05:48 AM   #86
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My old universal design...
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File Type: jpg DSC06193.jpg (313.3 KB, 169 views)
File Type: jpg DSC06032a.jpg (337.9 KB, 118 views)
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Old 16th April 2012, 06:45 AM   #87
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Nice, but I was was aiming for something slightly simpler.
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Old 4th July 2012, 02:24 PM   #88
RSK is offline RSK  Malaysia
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Default LM4780 works!

Quote:
Originally Posted by pinkmouse View Post
Afternoon folks, updated version is now attached. Layout and grounding improved, and dimensions reduced to fit my current application. As always, files in Eagle format, lines on top copper are jumpers. Enjoy.
Hi Al,

I put together your layout and it sings. I am surprised a chip like this produce very nice sound. Bass kicking. Amp is very silent.

Thank you very much.

Raj
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Old 18th November 2012, 03:13 PM   #89
spoco is offline spoco  Philippines
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Hello everyone,

i have a few lm4780 in my bin and i would also like to try this one. care to share a single sided pcb design in pdf format.

Thanks.

Regards.
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Old 18th November 2012, 03:42 PM   #90
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Spoco, if you download the free version of Eagle you can produce artwork from that.
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