BPA300 Eagle File .BRD - No Catches

DJ Exprice · 22nd November 2006, 08:26 PM

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!

DJ Exprice · 23rd November 2006, 06:24 PM

Opinions, anyone?

Is it great, good, okay, not so good, bad, or very bad? Please feel free to give me your opinions.

DJ Exprice · 23rd November 2006, 07:27 PM

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

traw · 24th November 2006, 01:47 AM

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.

DJ Exprice · 24th November 2006, 09:12 PM

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 here for Full Sized Image!

DJ Exprice · 24th November 2006, 09:15 PM

By the way, this board will require 5oz (minimum), 6oz (recommended), or even more (optimum) copper thickness.

...otherwise...

jleaman · 24th November 2006, 09:35 PM

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 here for Full Sized Image!

That is big. 6 chip's Is that 12 chips per channel or 6 chips per channel ?

DJ Exprice · 24th November 2006, 09:38 PM

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.

BWRX · 24th November 2006, 09:58 PM

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.

DJ Exprice · 24th November 2006, 10:02 PM

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.

24th November 2006, 09:58 PM	#9
BWRX diyAudio Moderator Emeritus Join Date: Jan 2005 Location: Pennsylvania	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. __________________ Brian

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23rd November 2006, 06:24 PM	#2
DJ Exprice diyAudio Member Join Date: Mar 2006 Location: San Francisco, California	Opinions, anyone? Is it great, good, okay, not so good, bad, or very bad? Please feel free to give me your opinions.

23rd November 2006, 07:27 PM	#3
DJ Exprice diyAudio Member Join Date: Mar 2006 Location: San Francisco, California	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

24th November 2006, 01:47 AM	#4
traw diyAudio Member Join Date: Sep 2005	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.

24th November 2006, 09:12 PM	#5
DJ Exprice diyAudio Member Join Date: Mar 2006 Location: San Francisco, California	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 here for Full Sized Image!

24th November 2006, 09:15 PM	#6
DJ Exprice diyAudio Member Join Date: Mar 2006 Location: San Francisco, California	By the way, this board will require 5oz (minimum), 6oz (recommended), or even more (optimum) copper thickness. ...otherwise...

24th November 2006, 09:38 PM	#8
DJ Exprice diyAudio Member Join Date: Mar 2006 Location: San Francisco, California	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.

24th November 2006, 10:02 PM	#10
DJ Exprice diyAudio Member Join Date: Mar 2006 Location: San Francisco, California	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.