amp with at least 2*300wpc

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kon10

Member
2010-04-19 4:11 pm
Hello, now i want to do a project. A nice amp with at least 2*300wpc.
Shall i use Lm3886 or TAS5630? I shall drive the amp with a pair of Cerwin Vega D6-E speakers so sound quality is not a big problem, i just want good bass. Stuff i have now is 2 big heatsings and a 600va 2*24v transformer. can i use that transformers with
TAS5630 ?
And do someone have a finished board layout?
How shall i do?

Regards
 
Hello, now i want to do a project. A nice amp with at least 2*300wpc.
Shall i use Lm3886 or TAS5630? I shall drive the amp with a pair of Cerwin Vega D6-E speakers so sound quality is not a big problem, i just want good bass. Stuff i have now is 2 big heatsings and a 600va 2*24v transformer. can i use that transformers with
TAS5630 ?
And do someone have a finished board layout?
How shall i do?

Regards

That can be done with eight of the LM3886TF chips and a drv134 kit.

Its four chips per channel. (four little amplifiers per speaker)

Bridging is done at the preamplifier level with the drv134 kit or a similar approach.

BPA200 is the name for it. National Semiconductor has this document on the topic: http://www.national.com/an/AN/AN-1192.pdf although they use a somewhat more complicated approach, it is quite similar. See page 12.

The BPA200 amplifier is rated 200 watts per channel but this is not fictional advertisement peaks. Its enough power to break those speakers. I'm sure that you don't need more power than that much.

See also Decibel Dungeon examples for a good starting place. Scaling up any of those amplifiers just requires some output resistors (parallel amplifiers need those), four times as many amplifiers, and the drv134 kit to bridge the parallel amplifiers.

Parallel amplifier:
Two amplifiers sharing the same input circuit. Both amplifiers have a small value, but sturdy, resistor at the output, which connect to the speaker jack.
The parallel amplifier handles twice the load.
It could handle two of those cerwin vegas per each channel.

Bridge amplifier:
Two amplifiers, one connects to the speaker negative and one connects to the speaker positive. At the small signal (input area) these are driven from a split signal via the drv134 chip or similar option for preamp.
The bridge amplifier puts out twice the power but only handles half as much load; SO, because of that.
It cannot handle one of those cerwin vegas; however. . .

Bridge Parallel Amplifier:
Like the bridge amplifier, except that you have bridged paralleled amplifiers--four of lm3886 chips per each speaker. This can handle a lot AND it can do a lot.
A tandem pair (parallel amp) drives the speaker negative and a tandem pair (parallel amp) drives the speaker positive. This makes a heck of a lot of power. Its about enough to send those speaker cones right out onto the floor.
 
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