Class T Audio Amplifiers - Page 5 - diyAudio
Go Back   Home > Forums > Commercial Sector > Vendor Forums > Inactive Vendor Forums > Connexelectronic

Connexelectronic Commercial Vendors large & small hawking their wares

 
 
Thread Tools Search this Thread
Old 16th August 2010, 11:27 AM   #41
col is offline col  Australia
diyAudio Member
 
col's Avatar
 
Join Date: Feb 2008
Location: Melbourne, Victoria, Australia
I think I just found the problem. If I disconnect the GND that goes from the speaker protection module to the -Vaux on the SMPS250 the signal looks much cleaner. Will try some audio through it.

col.
__________________
http://www.minirig.org.au
 
Old 17th August 2010, 08:27 AM   #42
Cristi is offline Cristi  Europe
diyAudio Member
 
Join Date: Dec 2008
Location: Dortmund+Shenzhen
i think that the ic might be damged.
i've been searching when you purchased the TA2022 amplifier board, to see from which version belongs and if i have any particular comments regarding that version. i haven't found your order... then i searched again, and i saw that you bought this board without ic, and u used the ic form the first board which you haven't used anymore, due to similar noise issues. contact me by mail, i can send you replacement if you can't make-it work.
__________________
www.connexelectronic.com complete assembled amplifier and SMPS
 
Old 23rd August 2010, 04:23 PM   #43
diyAudio Member
 
Join Date: Oct 2004
Location: Denmark
I have a few questions about TA3020V3B.

1, What is the max output power in BTL with the IRFP4228 output FETs? The documentation says 540 W in 8 ohm/960 W 4 ohm. But when you look at the documentation for the TA3020V3C it says 780W 8 ohm/1160 W 4 Ohm if using the IRFP4228 FETs. I gues the documentation for V3B just havent been updated with the output numbers for the IRFP4228 FET option?

2, For BTL mode with the TA3020V3B and output of 540 W in 8 ohm/960 w 4 ohm, what should the secondaries of the transformer be? I guess 2 x 42 VAC is the correct voltage?

3, The BIPS is good for driving 2 TA3020V3B boards in BTL mode?

Thanks.

Last edited by Neutrality; 23rd August 2010 at 04:31 PM.
 
Old 23rd August 2010, 07:41 PM   #44
diyAudio Member
 
Join Date: Oct 2004
Location: Denmark
Quote:
Originally Posted by Neutrality View Post

3, The BIPS is good for driving 2 x TA3020V3B boards in BTL mode?

Thanks.
 
Old 24th August 2010, 11:09 AM   #45
Cristi is offline Cristi  Europe
diyAudio Member
 
Join Date: Dec 2008
Location: Dortmund+Shenzhen
The output power of the TA3020v3b is same as for the TA3020v3c module. the manual wasn;t updated since i added the IRFP4228 MOS-FET's option.
if you want to use 2 TA3020v3c modules in BTL mode each for one channel, then can use a single BIPS module.
__________________
www.connexelectronic.com complete assembled amplifier and SMPS
 
Old 24th August 2010, 06:47 PM   #46
diyAudio Member
 
Join Date: Oct 2004
Location: Denmark
Another question.

Since the TA3020V3C has already been made ready to work in BTL mode just by a single resistor that makes one channel work out of phase with the other, doesnt that remove the buspumping issue and thereby making it possible to use V3C in BTL without that issue. Would save people from buying a BIPS.

The caps on V3C, how big are they diameter wise, 35 mm? If one were to change them to some higher value caps.
 
Old 25th August 2010, 10:48 AM   #47
Cristi is offline Cristi  Europe
diyAudio Member
 
Join Date: Dec 2008
Location: Dortmund+Shenzhen
Yes, on the TA3020v3c there is a small solder bridge on the bottom layer of the pcb which allow easier connection for BTL mode. in this way the amplifier can be used without the BIPS. the role of the BIPS is not only to allow easier BTL connection, but also to be used as input interface, the XLR balanced input can be used or Cinch connectors for unbalanced. also there are 2 switches from which can select the mode, Stereo or BTL and balanced/unbalanced. this functions cannot be replicated by the solder bridge on the bottom of the amplifier pcb only.
the capacitors are standard 35mm diameter, and can choose their value from 10mF to 18mF each. other capacitors can be used as well, which have minimum working voltage of 63V and same footprint.
__________________
www.connexelectronic.com complete assembled amplifier and SMPS
 
Old 28th August 2010, 10:41 PM   #48
diyAudio Member
 
Join Date: Jul 2008
To run the v3c in BTL mode, Do I just bridge the solder point or do I need to connect it with a resistor of some value?

Thanks.
 
Old 29th August 2010, 11:32 AM   #49
Cristi is offline Cristi  Europe
diyAudio Member
 
Join Date: Dec 2008
Location: Dortmund+Shenzhen
On the first and second batch of the TA3020v3c pcb's there need to solder one resistor, same value as the one between pins 22 & 23 or 25 & 26. on the last versions, the resistor is already there and i small solder bridge must be connected which is in series with this resistor. I remember that your boards are from the first batches, and the resistor must be added. please to this careful, to not damage the pads or the pcb.
__________________
www.connexelectronic.com complete assembled amplifier and SMPS
 
Old 30th August 2010, 08:01 PM   #50
diyAudio Member
 
Join Date: Jul 2008
Thankyou cristi.

Can you confirm all changes needed from running in stereo to BTL using bips?

1) add resistor at r74
2)take speaker output from outR and outL (pin 1 and 7 on output side)
3)amplifier signal imput will be on the R side.

Is this correct?

Are any changes needed to the amp imput wiring from the bips unit?

Thanks.
 

 


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


Similar Threads
Thread Thread Starter Forum Replies Last Post
non surface mount class D mono audio power amplifiers Conor Digital Source 10 4th October 2013 07:38 PM
Single-Ended Class-A Audio Amplifiers shaan Everything Else 32 4th September 2009 02:42 AM
Class A vs. IC amplifiers for PC audio Beggar Solid State 15 26th July 2002 11:58 AM


New To Site? Need Help?

All times are GMT. The time now is 08:42 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