Looking for a CLASS D amplifier design .

[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 !

[jwagnerhki]

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

[UrSv]

Why not check:

http://www.41hz.com/

[dmfraser]

See the audio power amp section at www.schematicsforfree.mattsoft.net

[classd4sure]

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.