Class D amplifier 1 KW RMS

[rth]

But this is a DIY site....

 

[km]

hi,

i would also recommend buying a finished amplifier/module.

best rgds - karsten madsen - cadaudio.dk/digiamps.com

 

[38628]

ive been in car audio for long time...

these 2300wrm car amps are rated for very low impedance drive, like one ohm and lower.

Mmats used to build them...

picture taken at CES back in 97 or 98...

 

[38628]

another picture...one of these amps was driving something like 12 15" subwoofers in this boom box...

enter at your own risk...that was totaly crazy, they were driving 135db+ with a 20-30hz sine wave...

lol, that was gooood time

 

[demogorgon]

damn, i'l say...

my Alpine kinda looks weak in comparasin..

 

[zilog]

Anyone know the brand/make/model of the power and speaker connectors used in the 2.3 kW amplifier? I am looking for something similar for my amp.

 

[serhatkay]

The real class d power amplifiers here!

Hi everyone...
This professional class d power amplifiers are very very quality and very-high power...

First Crest Audio
Second Yorkville sound

Good luck...

 

[mzzj]

I dont know why some people make fun of attempting high power low frequency class d.. I built quite a few smps but never built class d for real use and now i`d try it because it works on same principle. If i understand that properly it wouldnt need that high switching frequency for amplifying signals up to 500hz (or 1 khz)..

Would 10khz switching frequency be enough?
And is negative feedback necessary?

I tried once building class d with sg2524 for fun, it was very simple and it worked but i wonder if this would work for that power too?

10khz switching frequency is impractical. Size of output filter components become huge.

I have done full-bridge with 300v rail witch is good for about 6kW to 8ohms. (have measured 4.5kW to 4.5ohms) If you decide to desing it for 16ohms load things get easier and 300v rail with full-bridge still gives you almost 3kW.

4pcs of STW45NM50FD in full-bridge should be capable of that power if you drive them properly at enough low frequency. Infineon has some even better candidates, but usually with slow body-diode.

 

[samborambo]

10khz switching frequency is impractical. Size of output filter components become huge.

I have done full-bridge with 300v rail witch is good for about 6kW to 8ohms. (have measured 4.5kW to 4.5ohms) If you decide to desing it for 16ohms load things get easier and 300v rail with full-bridge still gives you almost 3kW.

4pcs of STW45NM50FD in full-bridge should be capable of that power if you drive them properly at enough low frequency. Infineon has some even better candidates, but usually with slow body-diode.

What chipset did you use for the PWM? You wouldn't happen to still have an (eagle) schematic of this beast would you?

Sam.

 

[mzzj]

What chipset did you use for the PWM? You wouldn't happen to still have an (eagle) schematic of this beast would you?

Sam.

"Chipset"
http://www.ee.oulu.fi/~masaj/class-d/P1040036.jpg

Some schematics here: http://www.diyaudio.com/forums/showthread.php?s=&threadid=69429&highlight=

I am currently doing layout for SMD PWM-stage board and opto/mag-couplers for drive signals. Plus tiny powersupply with 4x floating 15v outputs for gate drivers.

Anyone intrested in lower-power(100w-1kW) project based on Crown-BCA topology?

 

[demogorgon]

Anyone intrested in lower-power(100w-1kW) project based on Crown-BCA topology?

offcource i would! seems i'm alone though..

 

[Anzgar]

Re: Class T Option

You may consider building a Class T amplifier. It also has a switching output topology but the creation of the switching signal follows a digital route. Tripath, www.tripath.com, make the necessary processing chips all you have to do is add the output FETs. Again it is a very power efficient design which results in low weight but high power. There was a 300W per channel, bridge-able to 600W, described in Elektor Magazine starting June 2004 based on Tripath's TA3020. If you would like the articles I have them in soft format, I can email them to you.

Hi, will you please email the Elektor articles to me?

Anzgar

 

[lumanauw]

I've looked at Crown BCA power amp (K1-K2), and their output filter is quite complicated. Before the main amp, the signal is passing through "7th order gaussian low pass" and the output node is going through 7th order filter (L-C is 2nd order).

Is that properly designed classD should look this complex?

 

[lenz]

Hi Anzgar

I`m not "Antz", but I can send you this article in german,french.dutch or english . Your choice.
But I need an adress.

 

[Anzgar]

Hi Anzgar

I`m not "Antz", but I can send you this article in german,french.dutch or english . Your choice.
But I need an adress.

That's nice of you,thanks!

anzgar@gmail.com

 

[Anzgar]

That's nice of you,thanks!
English preferably.
anzgar@gmail.com

 

[SSassen]

Lenz,

Since you're offering I'll take the Dutch copy off your hands, you can fire it off to ssassen(at)hardwareanalysis(dot)com.

Thanks!

Sander Sassen
http://www.hardwareanalysis.com

 

[ashok]

Hi Lenz,
Would appreciate it, if you could send me an English copy .
Thanks.

ashokm( at )sify.com
Please replace the ( at ).

 

[_world_]

Hello Pafi

I am interesting about power amplifiers and a sow in your personal sit that you have made some such amps. My i ask you for some curcuit if you have of 1kW amp if you have. I ask other members in this forum but their offers don`t like me.
Regards

 

[savu]

"Chipset"
http://www.ee.oulu.fi/~masaj/class-d/P1040036.jpg

Some schematics here: my new 4.5kW class-d amp (crown BCA topology) - diyAudio

I am currently doing layout for SMD PWM-stage board and opto/mag-couplers for drive signals. Plus tiny powersupply with 4x floating 15v outputs for gate drivers.

Anyone intrested in lower-power(100w-1kW) project based on Crown-BCA topology?

hi mzzj,

care to share the project with us since the links you provided are dead.
i am working on something simmilar and i am curious how you have done the power stage and also the feedback loops.
mine (a simulation for the moment) goes up 6.8kw @ 2 R with 180Vdc single supply using fullbridge configuration.

regards,
savu