Big-t - 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 25th October 2006, 04:35 PM   #1
djQUAN is offline djQUAN  Philippines
diyAudio Member
 
Join Date: May 2004
Location: manila
Send a message via MSN to djQUAN Send a message via Yahoo to djQUAN
Default Big-t

my biggest T-amp.

I designed it to do 600W per channel into 2 ohms based on 41Hz's amp8.

note: first time to attach pics so hopefully it would come out.....

(edit: it did come out....good! )

the case is estimated to be about 7" wide, 29" long and slightly taller than 2".

this will be a big car amp.
Attached Images
File Type: jpg dsc01297.jpg (98.9 KB, 3848 views)
  Reply With Quote
Old 25th October 2006, 04:38 PM   #2
djQUAN is offline djQUAN  Philippines
diyAudio Member
 
Join Date: May 2004
Location: manila
Send a message via MSN to djQUAN Send a message via Yahoo to djQUAN
dual toroid SMPS with 14 IRFZ44 fets, 60A ixys rectifiers, four 6800uF primary side caps, and 10,940uF per rail on output side
Attached Images
File Type: jpg dsc01298.jpg (81.2 KB, 3324 views)
  Reply With Quote
Old 25th October 2006, 04:43 PM   #3
djQUAN is offline djQUAN  Philippines
diyAudio Member
 
Join Date: May 2004
Location: manila
Send a message via MSN to djQUAN Send a message via Yahoo to djQUAN
control PCB which has the aux SMPS for +/-15V for the op amps, 5V for the logic control (delayed signal for mute) and the amp8 chipset. also has preamp for added gain for weak sources and bass boost. also has a temp control for the fans soon to be added in the final case.
(red cap used for covering LED......too much glare. )
Attached Images
File Type: jpg dsc01300.jpg (83.5 KB, 2970 views)
  Reply With Quote
Old 25th October 2006, 04:46 PM   #4
djQUAN is offline djQUAN  Philippines
diyAudio Member
 
Join Date: May 2004
Location: manila
Send a message via MSN to djQUAN Send a message via Yahoo to djQUAN
close up of amp8 board

note: have not installed a heatsink for the driver chip....the result? it got too hot even if the chip slug was soldered to the PCB.
Attached Images
File Type: jpg abcd0001.jpg (94.4 KB, 3076 views)
  Reply With Quote
Old 25th October 2006, 04:48 PM   #5
djQUAN is offline djQUAN  Philippines
diyAudio Member
 
Join Date: May 2004
Location: manila
Send a message via MSN to djQUAN Send a message via Yahoo to djQUAN
and finally, the work bench
Attached Images
File Type: jpg dsc01299.jpg (90.5 KB, 3126 views)
  Reply With Quote
Old 25th October 2006, 05:00 PM   #6
BWRX is offline BWRX  United States
diyAudio Moderator Emeritus
 
Join Date: Jan 2005
Location: Pennsylvania
Nice job! Looks like a beast. Did you make the SMPS and control PCB? What speakers do you plan on driving?
__________________
Brian
  Reply With Quote
Old 25th October 2006, 05:11 PM   #7
RX5 is offline RX5  Philippines
diyAudio Member
 
RX5's Avatar
 
Join Date: Apr 2004
Location: TaC
djQUAN,



nice workbench



keep it up!!
__________________
RoCk On!!! I love my diy UcD!!
  Reply With Quote
Old 25th October 2006, 05:12 PM   #8
djQUAN is offline djQUAN  Philippines
diyAudio Member
 
Join Date: May 2004
Location: manila
Send a message via MSN to djQUAN Send a message via Yahoo to djQUAN
yep. the SMPS PCB has a small daughterboard that holds the PWM oscillator and driver (same with the aux supply) so the main PCB holds all high current stuff. the main PCB was drawn by hand.

main SMPS high current terminal blocks were hand made using hand tools. I can't find anything that could handle the current over here.

the control board was made using EAGLE and photoetching.

so far, I have tested it on full range and it sounds good. but it will be driving two Kicker comp VR subs in parallel 4 ohms bridged.
  Reply With Quote
Old 25th October 2006, 06:00 PM   #9
Baldin is offline Baldin  Denmark
diyAudio Member
 
Baldin's Avatar
 
Join Date: Jan 2005
Location: Copenhagen
Send a message via MSN to Baldin
Hi djQUAN

Really cool.
What controller are you using for the SMPS?

Great project
__________________
Visit www.sensibleaudio.dk or read latest news on Baldin's Blog
  Reply With Quote
Old 26th October 2006, 09:12 AM   #10
djQUAN is offline djQUAN  Philippines
diyAudio Member
 
Join Date: May 2004
Location: manila
Send a message via MSN to djQUAN Send a message via Yahoo to djQUAN
the same circuit that I posted in my website (www.djquan.angelcities.com/smps.html) but with different mosfet drivers. the one I used in that SMPS used totem pole drivers.
  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 08:23 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