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Old 24th September 2005, 03:16 PM   #1
darkm4n is offline darkm4n  Romania
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Default Looking for a CLASS D amplifier design .

Hi ,

I'am looking for a class D amplifier schematic .. more than 300 W RMS into 4 Ohm ... anyone have such a thing ? I searched google .. but nothing ....

Thanks !
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Old 28th September 2005, 01:58 PM   #2
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That's what annoys me maybe most, there are not really any DIY class-d amp "kits" or complete project pages. And no-one appears to have e.g. complete-and-working Eagle schematics and PCB designs. (unlike "analog" amps where tens to hundreds of very good and documented kits/projects are available)

You could try googling for "class-d reference design", although these are sometimes based around some hard to get proprietary IC.

Some links:

http://www.irf.com/technical-info/re...audiokits.html
http://www.irf.com/technical-info/re.../iraudamp1.pdf
(schematics and layout, but no PCB)

http://www.zetex.com/audio/audio04_3.asp
http://www.zetex.com/audio/audio05-1-5.asp
(for low-power ones, schematics and PCB)

and for example the ZXCD1000 datasheet
http://www.zetex.com/audio/audio05-1-2a.asp

Max output power is basically determined by the voltage of the voltage supply that feeds the full/halfbridge. With some reference designs like zetex ones you may get lucky by simply increasing the rail voltages (and maybe swap mosfets for higher voltage ones).

- Jan
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Old 28th September 2005, 02:08 PM   #3
UrSv is offline UrSv  Sweden
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Why not check:

http://www.41hz.com/
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Old 17th October 2005, 04:29 PM   #4
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Default Amp Schematics

See the audio power amp section at www.schematicsforfree.mattsoft.net
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Old 19th October 2005, 11:49 PM   #5
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Default Re: Looking for a CLASS D amplifier design .

Quote:
Originally posted by darkm4n
Hi ,

I'am looking for a class D amplifier schematic .. more than 300 W RMS into 4 Ohm ... anyone have such a thing ? I searched google .. but nothing ....

Thanks !

On top of those links just dig through this forum you'll find some amazing stuff.
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