Has anyone heard anything about this.... MPS7722...
2 X 20w @4 ohm w/ 9-24v.
http://products.monolithicpower.com/Products/evalLanding.do?evalId=51
Fedex is driving me one across the country, but the Spec. Sheets look promising. If you'd like to see them, you can get them at AllDataSheet by searching EV7722DF-00C......
It's such fun....$4 Eval. Board.... Plus $14 Shipping, Handling & Tax for 7 day delivery.... An Amp6 Basic cost $7 S&H in 4 days from Sweden!
2 X 20w @4 ohm w/ 9-24v.
http://products.monolithicpower.com/Products/evalLanding.do?evalId=51
Fedex is driving me one across the country, but the Spec. Sheets look promising. If you'd like to see them, you can get them at AllDataSheet by searching EV7722DF-00C......
It's such fun....$4 Eval. Board.... Plus $14 Shipping, Handling & Tax for 7 day delivery.... An Amp6 Basic cost $7 S&H in 4 days from Sweden!
sled108 said:
I hate to be the bearer of bad news, but I'm pretty sure you ordered just the IC.
Did you click the "buy" button on this page for the MP7722?
http://products.monolithicpower.com/Products/ParametricTable.do?categoryId=12
If so, it sends you to AVNET to purchase just the IC for $4.07 each.
You've got to be kidding me.....There goes my weekend....I must of paid $18 for a $4 Chip!! I'll get a whole lot of listening pleasure out of that. And then, they're Ground Fedexing me a microscopic Bug...I was directed from Monolithic to Avnet, for the last time.
If it's too good to be true......
Well, here's what I was hoping for....
http://pdf1.alldatasheet.co.kr/datasheet-pdf/view/189053/MPS/EV7722DF-00C.html
But it doesn't seem to be any way to buy the thing..
So much for buying "Locally".....Looks like I'll have to send my $ to China for one of these...On E-buy....
2*15 watt @ 4ohm, TA2024 D-class Audio Amplifier Board
So it goes......
http://pdf1.alldatasheet.co.kr/datasheet-pdf/view/189053/MPS/EV7722DF-00C.html
But it doesn't seem to be any way to buy the thing..
So much for buying "Locally".....Looks like I'll have to send my $ to China for one of these...On E-buy....
2*15 watt @ 4ohm, TA2024 D-class Audio Amplifier Board
So it goes......
Hi,
You can order an eval PCB (Stereo) from SureElectronics2 on e-bay for $7 + $5 shipping. They use the MP7720 which is according to MPS a 20W@4ohm (10% THD)
See here; http://cgi.ebay.com/2-8W-8ohm-4ohm-...photoQQcmdZViewItemQQ_trksidZp1742.m153.l1262
The SureElectronics says 8W at 4 or 8 ohm but according to the spec sheet of MP7720 it is more
Regards,
Eric
You can order an eval PCB (Stereo) from SureElectronics2 on e-bay for $7 + $5 shipping. They use the MP7720 which is according to MPS a 20W@4ohm (10% THD)
See here; http://cgi.ebay.com/2-8W-8ohm-4ohm-...photoQQcmdZViewItemQQ_trksidZp1742.m153.l1262
The SureElectronics says 8W at 4 or 8 ohm but according to the spec sheet of MP7720 it is more
Regards,
Eric
e_fortier said:
It looks like just a little over 10w RMS @ 4 ohm; after that THD shoots almost straight up.
For the SureElectronics board it looks like the best way to use it would be with differential inputs (BTL). That way you could remove the output coupling caps and get a clean 20w RMS @ 8 ohms. You would need two boards for stereo, but they are cheap enough.
An externally hosted image should be here but it was not working when we last tested it.
For the SureElectronics board it looks like the best way to use it would be with differential inputs (BTL). That way you could remove the output coupling caps and get a clean 20w RMS @ 8 ohms.
That sounds very good, overall size for the 2 PCB would be would be 3.5 inches x 4 inches.
The nice thing about the one I have (50W stereo) is that it's dead quiet, I always found that the SureElectronics had some hiss into them.
I have told them about the hiss issue and hopefully they will report back.
Removing the output cap sounds also very good since the one on the PCB are too small.
Way too many amp to play with, I'm going crazy ! I recently salvaged a power transformer from a Crown CE-2000 (+-85Vdc) and I also found 15 pairs of NOS lateral mosfet 2SK134/2SJ49 TO-3 case. These components with a few LME49830 would be nice but not enough time unfortunately but maybe some day...
Regards,
Eric
That sounds very good, overall size for the 2 PCB would be would be 3.5 inches x 4 inches.
The nice thing about the one I have (50W stereo) is that it's dead quiet, I always found that the SureElectronics had some hiss into them.
I have told them about the hiss issue and hopefully they will report back.
Removing the output cap sounds also very good since the one on the PCB are too small.
Way too many amp to play with, I'm going crazy ! I recently salvaged a power transformer from a Crown CE-2000 (+-85Vdc) and I also found 15 pairs of NOS lateral mosfet 2SK134/2SJ49 TO-3 case. These components with a few LME49830 would be nice but not enough time unfortunately but maybe some day...
Regards,
Eric
Well, I finally found how to get what I thought I was getting......
https://emwcs.avnet.com/webapp/wcs/...ion=products&N=0&term=EV7722DF%2D00C&x=13&y=3
Too late now....I'll just have to build one myself.....
https://emwcs.avnet.com/webapp/wcs/...ion=products&N=0&term=EV7722DF%2D00C&x=13&y=3
Too late now....I'll just have to build one myself.....
Hi Sled108,
The eval board you are refering uses the MPS7722 which is identical to MPS7720 except that it is a stereo IC. The mono type (MPS7720) also has slightly less distorsion at 1W.
If you buy the one from Sure-Electronics2 at $7 (+ $5 shipping) it is a stereo PCB using 2 x MPS7720 so basically you will get the same as using 1 x MPS7722.
Building your own will cost you more and we did not talk yet about the PCB layout possible issues. These MPS IC usually runs around 600kHz.
BTW, you can get free sample of output coils at www.coilcraft
These IC do sound very good but I'm not an audiophile how can you go wrong with $12 including shipping versus $30 for the eval PCB from MPS.
My 2 cents.
Eric
The eval board you are refering uses the MPS7722 which is identical to MPS7720 except that it is a stereo IC. The mono type (MPS7720) also has slightly less distorsion at 1W.
If you buy the one from Sure-Electronics2 at $7 (+ $5 shipping) it is a stereo PCB using 2 x MPS7720 so basically you will get the same as using 1 x MPS7722.
Building your own will cost you more and we did not talk yet about the PCB layout possible issues. These MPS IC usually runs around 600kHz.
BTW, you can get free sample of output coils at www.coilcraft
These IC do sound very good but I'm not an audiophile
how can you go wrong with $12 including shipping versus $30 for the eval PCB from MPS.My 2 cents.
Eric
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