LM3886 Schematics + PCB

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#531
Dear Mr. Mile, please be reminded that I am still awaiting for Your answer:

Dear Mr. Mile (and other members),

I have seen a lot of designs of LM3886/3875 but there are two opinions - one claims that these "Chipamps" are "rugged" and safe to use without speaker DC protection circuit. Mr. Mile loves rugged designs and always (99%) uses DC protection in his designs, but in this design I do not see it. Why?
Other claims that it should be used without compromises.
What is Your opinion/experience?
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#533
franziscko said:
I know!! it is for this i need a variable psu!
Thanks!
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You could use LM338 voltage regulators to bring it down to +-35VDC. These regulators work well and are inexpensive. They also save money by using less capacitors. I have personally used the design (snubberized version at bottom of page) at Building an LM3886 Gainclone chip amp with a regulated power supply (PSU).. It works very well for chipamp power supply and is easy to build. Don't try to drop more than 7 volts or the IC will get hot.
 
#535
prasi said:
Thanks Mr. Mile.

Here are the schematic, stuffing guide, pdf's and gerbers for anyone willing to try🙂.
reg
Prasi
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prasi said:
Finally PCB's came.
i have components procured too, from a local store here. i plan to use TL072 instead of OPA2134 as they are not available here.

ready to ship out, those who have booked, pl pm me with name, country, paypal, shipping address, postal code.
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Hi Prasi, for the final PCB that you tested, would you mind sharing the gerbers and stuffing guide/schematic? Thank you for considering.
 
#536
jwicaksana said:
Hi Prasi, for the final PCB that you tested, would you mind sharing the gerbers and stuffing guide/schematic? Thank you for considering.
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Hi,
sure , here they are.
All the best for your build.
I also have a single sided version(untested), if you are interested, posted previously.

regards
Prasi
 

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#540
mexmike said:
Hi Prasi,

Enta vishesham?

I'm interested in the single side SGC (untested ) layout if you still have. I'm trying to get a Cordell amp up. I've also posted a possible design asking for advice, it includes the Klever Klipper!

Thanks!
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Hello Mexmike,
you know some Indians? Nice... That phrase is spoken somewhat further south from where I live, although I understand it.

The single sided SGC is posted in post # 245 LM3886 Schematics + PCB
I have posted both gerbers and pdfs. I dont have the boards myself.
You could etch them yourself with pdfs or simply order the boards from pcbway.

All the best for your build.

regards
Prasi
 
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