BPA300 Eagle File .BRD - No Catches - diyAudio
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Old 22nd November 2006, 09:26 PM   #1
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Default BPA300 Eagle File .BRD - No Catches

Finally after all of those anxious days of waiting for this to arrive, it is here!

The BPA300 Eagle File!

Stereo 300 watts* per channel using LM3886 Chips.

I will have Gerber files and PDF files soon!



*Note: If you give this amp enough power, it is possible to achieve 400 watts of amplification per channel. Not completely recommended, but if you know you can do this and you know you have the heat sinks to handle this, give it a shot - why not?

I would also like to thank Monster very much for putting a schematic and a picture of the boards he made on the internet for DIY hobbyists! You rock, Monster!
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File Type: zip bpa300_v2.brd.zip (56.5 KB, 701 views)
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Old 23rd November 2006, 07:24 PM   #2
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Opinions, anyone?

Is it great, good, okay, not so good, bad, or very bad? Please feel free to give me your opinions.
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Old 23rd November 2006, 08:27 PM   #3
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BPA300 Files (http://www.the-diy-life.com mirror):

BRD:

http://www.the-diy-life.com/BPA300/BPA300_v2.brd.zip

Gerber:

http://www.the-diy-life.com/BPA300/BPA300_v2_gerber.zip
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Old 24th November 2006, 02:47 AM   #4
traw is offline traw  United States
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at quick glance can see it is not cheap to be fabbed given sq inch. haven't looked over circuit in detail. see that it's using 'phase spliiter' (drv134/ssm2142). i've have mixed results using balanced line drivers - not sure if missing something like a resistor or cap somewhere my own attempts but get a hiss using them. used non-inv opamp followed by inv opamp with better results myself.
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Old 24th November 2006, 10:12 PM   #5
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It is big, I will say that, but it's 300-400 watts of power per channel, so it's going to be a big board one way or another.

Eagle's PS Printout (Anti-aliasized screen shot):

Click the image to open in full size.
Click here for Full Sized Image!
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Old 24th November 2006, 10:15 PM   #6
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By the way, this board will require 5oz (minimum), 6oz (recommended), or even more (optimum) copper thickness.



...otherwise...
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Old 24th November 2006, 10:35 PM   #7
jleaman is offline jleaman  Belgium
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Quote:
Originally posted by DJ Exprice
It is big, I will say that, but it's 300-400 watts of power per channel, so it's going to be a big board one way or another.

Eagle's PS Printout (Anti-aliasized screen shot):

Click the image to open in full size.
Click here for Full Sized Image!

That is big. 6 chip's Is that 12 chips per channel or 6 chips per channel ?
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Old 24th November 2006, 10:38 PM   #8
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Six chips per channel. It's 2 channel.


LM3886T is recommended.
LM3886TF can be used only if you do not run above 300 watts per channel.
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Old 24th November 2006, 10:58 PM   #9
BWRX is offline BWRX  United States
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So that's what, about 16" by 7"? And you want 5oz, 6oz, or more copper weight... I hope you have some good connections in the PCB manufacturing industry otherwise you'll be paying a lot to have that made! You'd be better off splitting that up into at least two boards. One board for the power/output section and one for the input section. A little layout tip - try to keep it as compact as possible without compromising other design criteria.
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Old 24th November 2006, 11:02 PM   #10
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It is actually pretty much single boarded.

Look at Monster's BPA.

My board has rectifiers, some caps, the drv134 balancers, and the power amp all in one.

I agree. It will be expen$ive.
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