Tiny 6x300W amp - diyAudio
Go Back   Home > Forums > Amplifiers > Class D

Class D Switching Power Amplifiers and Power D/A conversion

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 16th August 2009, 09:16 AM   #1
berni8k is offline berni8k  Slovenia
diyAudio Member
 
Join Date: May 2009
Send a message via MSN to berni8k Send a message via Yahoo to berni8k
Default Tiny 6x300W amp

When i looked at my old TAS5630 board i tought of putting all 3 amps on to a single board and it worked.

This is the result a 6x300W amp on only a 100x160 single layer board. For the power for all the amps will be distributed off a big busbar going on the bottom on the board (Shown in blue) As i find that the best way of feeding the power to all of the powerful amps as the total power is a ridiculous 1800W (over 35A from 50V rail). Even tho i never plan to run it even close to that (Its mainly headroom and to keep it cold) I like to make what i design run well at top specs even tho i dont need it to.

Mounting holes for the board and heat sink will come later.

So what do you guys think about the board? See space for improvements?
Attached Images
File Type: png 6ch amp.png (57.3 KB, 1116 views)
  Reply With Quote
Old 17th August 2009, 01:36 PM   #2
h_a is offline h_a  Europe
diyAudio Member
 
h_a's Avatar
 
Join Date: Sep 2006
Location: Graz, Austria
I didn't know this chip and just had a short look at its datasheet; if you look at the THD vs. power plot you'll find that a more realistic rating is 100W for this amp. The huge power figures are quoted at 10% THD which is only a number and has no connection to reality (that clipping can fry your tweeters). More reasonable is 1% THD IMHO.

So you don't have to worry too much about your bus bar

Certainly clean wiring is always a good thing.

Have fun, Hannes
  Reply With Quote
Old 17th August 2009, 03:47 PM   #3
berni8k is offline berni8k  Slovenia
diyAudio Member
 
Join Date: May 2009
Send a message via MSN to berni8k Send a message via Yahoo to berni8k
Yeah i know the distortion goes up at those levels and as i sead i dont plan to use it even close to max its mainly headroom and to keep it cold. The supply still have to be good for a D class.
  Reply With Quote
Old 17th August 2009, 04:19 PM   #4
h_a is offline h_a  Europe
diyAudio Member
 
h_a's Avatar
 
Join Date: Sep 2006
Location: Graz, Austria
Quote:
to keep it cold
With this ClassD amp you certainly will

If it's really 85% efficient, the 15W/channel power dissipation are really easy to handle - and that's at full power (100W).

Have fun, Hannes
  Reply With Quote
Old 17th August 2009, 04:23 PM   #5
berni8k is offline berni8k  Slovenia
diyAudio Member
 
Join Date: May 2009
Send a message via MSN to berni8k Send a message via Yahoo to berni8k
Yup thats why i using this chip,a lot of other chips from Texas use higher Rds mosfets that make it heat considerably more.

Il probably get this thing etched in a few days
  Reply With Quote
Old 17th August 2009, 04:27 PM   #6
sexya is offline sexya  India
diyAudio Member
 
Join Date: Jun 2007
Location: Bombay/India
Send a message via MSN to sexya Send a message via Yahoo to sexya
Default INDuctors

hiii
sexy design i would say... hmmm i m interested in CLass d.. Got a few samples... not the same chip though... its tooooooooo high power for me .. ( i love it but >... might get kicked by the landlord)
anyways i have a small baby TPA3122 & TPA3123... i not sure as to how to make the Inductors... i Dont have the LCR mEtter in BOmbay - inida... it a rare comodity in this country...... it would be a great help if you could help me in making 22uH / 4amps at 1khz i do have some ring ferrite core.. all would need how many turns and what diameter of wier to use ....
thanks
  Reply With Quote
Old 17th August 2009, 04:30 PM   #7
berni8k is offline berni8k  Slovenia
diyAudio Member
 
Join Date: May 2009
Send a message via MSN to berni8k Send a message via Yahoo to berni8k
One thing the chips from Texas work at 300Khz

As for the inductors they should work on a 2cm diameter toroid with around 24 to 28 turns
  Reply With Quote
Old 17th August 2009, 05:04 PM   #8
sexya is offline sexya  India
diyAudio Member
 
Join Date: Jun 2007
Location: Bombay/India
Send a message via MSN to sexya Send a message via Yahoo to sexya
Default inductor

hii
thanks for that tip. but i m concerend of the wire gauge... and secondly i read some where that the inductors affect the output as in its level... if its not right value you wont get its output to drve teh speaker to actuall power...
how true is it
  Reply With Quote
Old 17th August 2009, 05:07 PM   #9
berni8k is offline berni8k  Slovenia
diyAudio Member
 
Join Date: May 2009
Send a message via MSN to berni8k Send a message via Yahoo to berni8k
Well id use something like 1-2 mm2 wire on it. Oh and the thing is if you make a too big inductor its going to attenuate the high freqencys from the audio signal and that is a bad thing, A too small inductor will make a high idle current and dissipate more idle power in to the speaker while producing a lot of EMI.
  Reply With Quote
Old 17th August 2009, 05:26 PM   #10
sexya is offline sexya  India
diyAudio Member
 
Join Date: Jun 2007
Location: Bombay/India
Send a message via MSN to sexya Send a message via Yahoo to sexya
Default hii

hey my gmail id is adityamody@gmail.com ... can we chat up
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



New To Site? Need Help?

All times are GMT. The time now is 04:03 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2