Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Class D Switching Power Amplifiers and Power D/A conversion

TPA3255 - all about DIY, Discussion, Design etc.
TPA3255 - all about DIY, Discussion, Design etc.
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 10th August 2018, 10:03 AM   #781
FauxFrench is offline FauxFrench  France
diyAudio Member
 
Join Date: Dec 2017
If you mean a circuit diagram when you write "the TPA3255 China schema", the low power parts are found appended to posting #303 of this thread: What is wrong with TPA3255?
  Reply With Quote
Old 10th August 2018, 10:14 AM   #782
FauxFrench is offline FauxFrench  France
diyAudio Member
 
Join Date: Dec 2017
Quote:
Originally Posted by doctormord View Post
Interesting to see these converters now being sold as 40A modules, they where 30A a year ago and even only 20A without fan and single-core inductor. Keep in mind, current rating is primary limited, so at 10Vin the 1800W converter only does 400W input side * efficiency (like 0.85) = 340W
It must be the inflation that affects more-and-more details of our life. When the truth is only a matter of the perception of those listening, the absolute value may become "fake news".

As can be concluded from this, always be skeptical when it sounds less likely and apply a good operational margin. The module discussed is really cheap for such a performance and is most likely sold by a trading company not well aware of the technical realities.
  Reply With Quote
Old 10th August 2018, 01:38 PM   #783
FauxFrench is offline FauxFrench  France
diyAudio Member
 
Join Date: Dec 2017
Quote:
Originally Posted by Kurtsmiling View Post
....... in the Couserans in Ariege.
Just stunning beauty. I understand why Kurt is smiling. And, no EDF bill to pay.
  Reply With Quote
Old 12th August 2018, 01:43 PM   #784
dekron is offline dekron  France
diyAudio Member
 
Join Date: Aug 2018
Hi everyone,


The Tpa3255 board from 3e audio is unavaiable for some weeks now on their ebay's webstore, do you got any intel about any new batch release date or an other providing way ?
  Reply With Quote
Old 13th August 2018, 12:56 AM   #785
earsofgold is offline earsofgold
diyAudio Member
 
Join Date: Aug 2018
I've sent them an email to ask.
  Reply With Quote
Old 13th August 2018, 07:13 AM   #786
Kurtsmiling is offline Kurtsmiling  France
diyAudio Member
 
Join Date: Jan 2017
Quote:
Originally Posted by FauxFrench View Post
Just stunning beauty. I understand why Kurt is smiling. And, no EDF bill to pay.
Yes, absolutely stunning. Thank you FauxFrench and doctormord for the information on the voltage converters.
  Reply With Quote
Old 13th August 2018, 02:41 PM   #787
earsofgold is offline earsofgold
diyAudio Member
 
Join Date: Aug 2018
Quote:
Originally Posted by dekron View Post
Hi everyone,


The Tpa3255 board from 3e audio is unavaiable for some weeks now on their ebay's webstore, do you got any intel about any new batch release date or an other providing way ?
They've said they'll have them back this week, so that's good.

Now for my stupid question. How would I use that board as an finished amp, since it doesn't have a way to control the gain, ie no volume pot. Is it just running at a fixed gain all the time?

Do I need a separate preamp, and if so what cheap Chinese board with amazing specs do people recommend to do that?
  Reply With Quote
Old 13th August 2018, 02:57 PM   #788
silasmellor is offline silasmellor  Denmark
diyAudio Member
 
Join Date: Nov 2016
Location: Denmark
TPA3255 - all about DIY, Discussion, Design etc.
That or a DAC with digital volume control (provided it has the proper gain). I’ve run one off a preamp/streamer with good results.
  Reply With Quote
Old 13th August 2018, 03:32 PM   #789
earsofgold is offline earsofgold
diyAudio Member
 
Join Date: Aug 2018
Quote:
Originally Posted by silasmellor View Post
That or a DAC with digital volume control (provided it has the proper gain). Iíve run one off a preamp/streamer with good results.
How do I find out what gain the board is (I was thinking about the je audio tpa3255 board), and how to calculate what kind of preamp to use? I saw that the tpa3255evm uses NE5532 opamps and there are NE5532 boards available on ebay but not exactly sure what I'll need or if there are better options.

I'm not really a fan of having everything set up with massive gain with no physical volume knob! My Focusrite 6i6 audio interface has a knob on the breakout box for the monitor outputs, but I'd rather have a control on the preamp or amp as well.
  Reply With Quote
Old 14th August 2018, 12:16 PM   #790
lithoc is online now lithoc  Malaysia
diyAudio Member
 
lithoc's Avatar
 
Join Date: Jul 2005
Location: Seremban2
Hi All,

Just bought a new TPA3255 2.1 board from
2018 TPA3255 2.1 Amplifier Board -in Amplifier from Consumer Electronics on Aliexpress.com | Alibaba Group
2018 TPA3255 2.1 Amplifier Board -in Amplifier from Consumer Electronics on Aliexpress.com | Alibaba Group to Clipboard"]2018 TPA3255 2.1 Amplifier Board
2018 TPA3255 2.1 Amplifier Board -in Amplifier from Consumer Electronics on Aliexpress.com | Alibaba Group to Clipboard[/URL]

The amp have 3 knobs. One for bass and only affect the subwoofer channel. One knob for treble which only affect the stereo channel.
And a master volume knob.

My setup is using Visaton FR58 + GF200 8ohm
Power adapter is 48v 3a

After listening to more than 24hours , I notice the amp is very clean and definitely a major improvement compare to TPA3116/8 , TDA7498 and even STA326

But there's loud pop when turn on and that's my complain. Turn off doesn't have pop


Suggestions for improvement/mod:
- instead of bass circuit. A simpler low pass filter with volume knob is enough. Less component
- remove treble knob ? Less component
- can use smaller input capacitor value as high pass filter

Note: the step down regulator use for 12v is XL8005

Hope it help those who looking for this amp
  Reply With Quote

Reply


TPA3255 - all about DIY, Discussion, Design etc.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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Inexpensive HDMI 2 channel receiver design discussion brw02005 Construction Tips 1 6th March 2016 07:27 PM
A Discussion on Design Philosophy - OB vs Multiway vs NOB miragem3i Multi-Way 2 10th July 2014 03:02 AM
Discussion: push pull design and minimal distortion does it matter ? hoppaz Subwoofers 19 15th November 2012 08:34 PM
Car subwoofer (2x8" fancy design discussion) VEC7OR Subwoofers 11 29th May 2004 09:12 PM


New To Site? Need Help?

All times are GMT. The time now is 05:55 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki