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-   -   MPS7720 DIP08 Chip (http://www.diyaudio.com/forums/class-d/123631-mps7720-dip08-chip.html)

sled108 24th May 2008 01:24 AM

MPS7720 DIP08 Chip
 
2 Attachment(s)
Are these worth looking into? A DIP8 chip with a Cmoy simple circuit.. 20W @ 4 ohm 9-24V?

How do they sound? I guess that's the big question...

sled108 24th May 2008 02:41 AM

2 Attachment(s)
Here's the Eval. Board Schematic...

sled108 24th May 2008 04:43 AM

2 Attachment(s)
Oh well, so much for DIY....How can you do it yourself better than this..

The chip goes for $2.18 each...With $8.00 Handling + Shipping + Tax...

That's over $12 for the chips alone???

So, the next thing is to Hear how it Sounds...

Anyone heard one of these??...

dweekie 24th May 2008 05:11 AM

I posted in the other thread, but it kind of sucks stock. :devilr: You should grab another one and go BTL, or try a hand at a dual supply design, but that would complicate things a bit more.

lumanauw 24th May 2008 05:18 AM

There's a big thread about this chip

http://www.diyaudio.com/forums/showt...953&highlight=

sled108 24th May 2008 05:19 AM

Do you know how the 7720's Sound? Is it worth the trouble??
Are they on par with a TA2024?

If so, Than it's a whole nother story...

lumanauw 24th May 2008 09:44 AM

BWRX can answer your question :)

kenpeter 27th May 2008 04:40 AM

TI's webpage offers tpa3122d2 in a
20pin DIP.

15W+15W, bridgeable... PDF seems
to suggest 40W into 8ohm 28V BTL
is quite reasonable.

Around 4 bucks last I looked, I dunno
which distributor or shipping to use...

I would suggest solder to a PCB with
a heatsink worthy ground plane.
The DIP boards I have worked with,
did not use a socket. I suspect that
decision to solder was intentional.

http://focus.ti.com/docs/prod/folder...tpa3122d2.html

I've never tried MPS, I could not compare.

And to be fair, I rarely ever crank the
power supply past 12V unless a test
procedure calls for it. Its just too loud.

BWRX 27th May 2008 05:20 AM

Quote:

Originally posted by sled108
Are they on par with a TA2024?
In my opinion, yes.

I was never able to obtain samples of the DIP8 package, only the SO8 package.

sled108 3rd June 2008 12:14 PM

The MPS7720 Amp arrived, 6 days from Hong Kong to NJ....Not bad...

It sounds nice right out of the box, smooth and tight with none of that 'new chip' harshness. It has plenty of punch on 14V and I'll let it burn-in for a while.

The only issue I've found is a really odd Cap discharge sound when turned off...Kind of Ray Gun like.

No big deal, but it would be nice lessen it.


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