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Class D Switching Power Amplifiers and Power D/A conversion

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Old 28th April 2004, 01:51 PM   #11
sonu is offline sonu  India
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Default Class D amp

Thanks,
can you please refer to any website for the PCB layout.
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Old 28th April 2004, 08:05 PM   #12
Ryssen is offline Ryssen  Sweden
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Did a serch maybe there is something there http://www.google.se/search?q=AN9525...%B6kning&meta=

Im interested to.
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Old 28th April 2004, 11:36 PM   #13
Ryssen is offline Ryssen  Sweden
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http://www.intersil.com/support/dist...n=HIP4080AEVAL
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Old 30th April 2004, 01:25 PM   #14
sonu is offline sonu  India
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The links you mentioned, they have no stock for Evaluation Boards.

Anybody there who could help in getting a Evaluation board,
----OR----
Postscipt, Gerber Files of the PCB.

I am very desparate to get it working & getting good performance from these cool Amps Design.

ANYBODY THERE.

Regards,
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Old 30th April 2004, 04:07 PM   #15
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HIP4080 is quite choosy with mosfets. I've tried with IRF540, but failed. Maybe the input cap is too big. Try other/newer kind of mosfet, with lower input cap. I've tried with FDP mosfets, and works fine.
There will be always little noise/hiss, and DC offset. Usually can be made minimum, but cannot eliminate them.

It seems Intersil cant (or wouldnt) give as much support, as they have sell the technology to Behringer.
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Old 30th April 2004, 04:41 PM   #16
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You cannot very easily make a quiet class D amp on a single sided board. I found ground planes are very important for quiet operation. The B&O mdules i use are done with a 4 layer PCB to get the 115db S/N ratio they have.

Also, the HIP4080 IC has a primitive single comparitor modulator that is not particularly good. Whie it is a decent FET driver, the quality of the modulator means that you have to either use an external modulator or you use this amplifier just as a sub-woofer amplifier. Many class D car amps, like Kicker use the 4080 in the sub channel but class B for the other channels.

There are some class D amp schematics available at:

www.schematicsforfree.mattsoft.net
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Old 30th April 2004, 06:20 PM   #17
Ryssen is offline Ryssen  Sweden
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Quote:
HIP4080 is quite choosy with mosfets. I've tried with IRF540, but failed. Maybe the input cap is too big. Try other/newer kind of mosfet, with lower input cap. I've tried with FDP mosfets, and works fine.
I have ordered a couple of samples of HIP4080,but I could not get a hold of any HIP2060 the N chanel,halfbrigde Power MOSfets that they have,does anyone have a schema with IRF540 or FDP mosfets,Whatever they are?And what is the output with these,I am going for a sub amp for my computer or iRiver.By the way if I happend to get a hold on HIP2060 what would the outputpower be?
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Old 1st May 2004, 06:57 PM   #18
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Why not go for the HIP4081 and have independent control over all of the FETs?

I can tell you from experience that doing a buck converter (very similar to a Class D design) is fussy on vero board.
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