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Old 17th October 2008, 08:26 PM   #1
Ulew is offline Ulew  Sweden
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Default A good single sided PCB for bridged LM4780?

Hi! I'm new here and I'm about to build a pair of bridged LM4780-amps. I've searched a hole lot but I haven't found a good single sided PCB for a bridged LM4780. Does anyone have one that I can use right of?
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Old 18th October 2008, 02:01 AM   #2
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Old 18th October 2008, 08:05 AM   #3
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Originally posted by mightydub
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But don't even try. It is next to impossible. Due to the pin layout you have to pass power traces in between pins that are much too narrowly spaced for the required trace width. People, who know how to make a single-sided version for the LM4780 also know that it makes no sense.

If you want a two-channel IC that can be implemented on a single-sided PCB, use the LM1876 (2 x 20 W), the LM4765 (2 x 30 W) or the LM4766 (2 x 40 W) without connecting the mute and stand-by functions. Else use a double-sided PCB or two LM3886.
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Old 18th October 2008, 09:29 AM   #4
Cobra2 is offline Cobra2  Norway
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Old 18th October 2008, 09:59 AM   #5
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Default check this out

single sided DIY lm4780 pcb
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Old 18th October 2008, 10:04 AM   #6
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Default impossible is nothing my friend...

Quote:
Originally posted by pacificblue



But don't even try. It is next to impossible. Due to the pin layout you have to pass power traces in between pins that are much too narrowly spaced for the required trace width. People, who know how to make a single-sided version for the LM4780 also know that it makes no sense.
impossible is nothing my friend...check this out , i have made a dozens of this at home..

http://diygainclone.blogspot.com/200...780-based.html
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Old 18th October 2008, 11:35 AM   #7
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Default Re: impossible is nothing my friend...

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Originally posted by kuldeepsingh
impossible is nothing my friend...[/url]
I know. That's why I only wrote "next to impossible".
On the other hand using jumpers is cheating, is it not?
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Old 18th October 2008, 02:42 PM   #8
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Default Re: Re: impossible is nothing my friend...

Quote:
Originally posted by pacificblue

On the other hand using jumpers is cheating, is it not?
no dear, cheating to whom?.. the purpose should me solved. it was difficult to get double sided blank PCB at my place and even if i get one, it is more difficult to match top and bottom layer for correct hole drilling,

but here using jupers, i achieved very good results, but there are no jumpers in the signal path, i had only 4 jumpers in my final layout, which i feel is quite a decent number keeping simplicity of layout in mind.
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Old 18th October 2008, 02:59 PM   #9
ratza is offline ratza  Romania
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Default Re: Re: impossible is nothing my friend...

Quote:
Originally posted by pacificblue

On the other hand using jumpers is cheating, is it not?

This means that also using dual layer PCB is cheating, as it serves the same purpose: the shortest routes as possible. Isn't it?
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Old 18th October 2008, 03:50 PM   #10
Ulew is offline Ulew  Sweden
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kuldeepsingh: Nice! Is it bridged?
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