High Power Chip-based Amplifier?

deiksac · 23rd October 2006, 04:05 PM

Tried some basic searching on the forum but did not get to any satisfactory result.

My question is: Is it easily possible to build a chip-based amplifier able to deliver say 600W peak / 300 W average into 8 Ohm load?

Nordic · 23rd October 2006, 04:39 PM

Have a look at this, not quite up there where you wanted... but better than no reply...

http://www.national.com/an/AN/AN-1192.pdf

SpittinLLama · 23rd October 2006, 05:48 PM

Look into the LM4702, it should be possible but not as easy to use as a chip amp. With up to +/-100V rails (A version, not out yet) there is great potential for power. +/-75V, the B or C version, can't remember, should get you pretty close to 300W into 8 ohms. Not a ton of info about this part out there but check out the datasheet at National's website.

-SL

halo0925 · 23rd October 2006, 07:57 PM

use LM3886 Times 6 at 40VDC+/- rails in a bridged parallel configuration will give you about 300 watts into an 8 ohm load.
The LM4870 is not a good idea becuase of its reduced dissipation, and dissipation is of major concern with a BPA design.

chingon · 24th October 2006, 04:09 AM

seems to me this is what halo is talking about:
http://www.shine7.com/audio/bpa300.htm

audioPT · 24th October 2006, 11:31 AM

chingon,

check my site:
http://audiopt.pm-si.com/

It's in portuguese, but you can use google to translate it.

deiksac · 24th October 2006, 01:30 PM

Thanks for the info, guys :-)

23rd October 2006, 04:05 PM	#1
deiksac diyAudio Member Join Date: Jun 2004 Location: Prague	High Power Chip-based Amplifier? Tried some basic searching on the forum but did not get to any satisfactory result. My question is: Is it easily possible to build a chip-based amplifier able to deliver say 600W peak / 300 W average into 8 Ohm load?

23rd October 2006, 07:57 PM	#4
halo0925 diyAudio Member Join Date: Aug 2006	high power GC use LM3886 Times 6 at 40VDC+/- rails in a bridged parallel configuration will give you about 300 watts into an 8 ohm load. The LM4870 is not a good idea becuase of its reduced dissipation, and dissipation is of major concern with a BPA design.

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23rd October 2006, 04:39 PM	#2
Nordic diyAudio Member Join Date: Sep 2005	Have a look at this, not quite up there where you wanted... but better than no reply... http://www.national.com/an/AN/AN-1192.pdf

23rd October 2006, 05:48 PM	#3
SpittinLLama diyAudio Member Join Date: Apr 2005 Location: In the Wild, Wild West	Look into the LM4702, it should be possible but not as easy to use as a chip amp. With up to +/-100V rails (A version, not out yet) there is great potential for power. +/-75V, the B or C version, can't remember, should get you pretty close to 300W into 8 ohms. Not a ton of info about this part out there but check out the datasheet at National's website. -SL

24th October 2006, 04:09 AM	#5
chingon diyAudio Member Join Date: Oct 2006	seems to me this is what halo is talking about: http://www.shine7.com/audio/bpa300.htm

24th October 2006, 11:31 AM	#6
audioPT diyAudio Member Join Date: Aug 2002 Location: Right here	chingon, check my site: http://audiopt.pm-si.com/ It's in portuguese, but you can use google to translate it.

24th October 2006, 01:30 PM	#7
deiksac diyAudio Member Join Date: Jun 2004 Location: Prague	Thanks for the info, guys :-)

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