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

TDA8954TH - XH-M252 board - anyone?
TDA8954TH - XH-M252 board - anyone?
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 1st November 2018, 01:27 PM   #1
dzwer is offline dzwer  Bulgaria
diyAudio Member
 
dzwer's Avatar
 
Join Date: Jun 2009
Location: Sofia
Default TDA8954TH - XH-M252 board - anyone?

Anyone tried this amp board?
TDA8954TH Class D High Power Dual-Channel Digital Audio Amplifier Board 420 I1A2 192948093630 | eBay
I think to purchase one and to try to convert it to 4 SE channels to make active speakers with a DSP.
And maybe one cheaper mono board with the same TDA8954 IC for subwoofer.
How it sounds for full range speakers?
The default sampling frequency is 350kHz, but it can be set up to 500kHz, according the datasheet.
__________________
Nothing moves you like a hydropneumatic Citroen...
  Reply With Quote
Old 14th November 2018, 12:42 PM   #2
dzwer is offline dzwer  Bulgaria
diyAudio Member
 
dzwer's Avatar
 
Join Date: Jun 2009
Location: Sofia
Nobody?
__________________
Nothing moves you like a hydropneumatic Citroen...
  Reply With Quote
Old 14th November 2018, 01:05 PM   #3
chermann is offline chermann  Austria
diyAudio Member
 
Join Date: Jan 2017
Location: Vienna
after using the search function
i found this

maybe something for you..
TDA8954 Weak Output
  Reply With Quote
Old 14th November 2018, 01:13 PM   #4
IVX is offline IVX  Ukraine
diyAudio Member
 
IVX's Avatar
 
Join Date: Jul 2003
Location: south of China
I didn't try exactly the same board but 8 years ago I used 8954 in commercial design and have to say that idea to use sendust-125 core in the output filter is very bad. 8954 using feedback before filter, hence you need some coils with good linearity, as IR used micrometals#2 or gapped ferrite.
__________________
Let's do smth nearly impossible!
E1.
  Reply With Quote
Old 14th November 2018, 03:27 PM   #5
dzwer is offline dzwer  Bulgaria
diyAudio Member
 
dzwer's Avatar
 
Join Date: Jun 2009
Location: Sofia
Quote:
Originally Posted by chermann View Post
after using the search function
i found this

maybe something for you..
TDA8954 Weak Output
I used Search too, before opening the thread.
This is different board, with different parts and different routing...

IVX, I don't know what are the cores of the output filters of these boards.
Thanks for the information!
__________________
Nothing moves you like a hydropneumatic Citroen...
  Reply With Quote
Old 14th November 2018, 07:05 PM   #6
chermann is offline chermann  Austria
diyAudio Member
 
Join Date: Jan 2017
Location: Vienna
Quote:
Originally Posted by dzwer View Post
I used Search too, before opening the thread.
This is different board, with different parts and different routing...

IVX, I don't know what are the cores of the output filters of these boards.
Thanks for the information!

sorry I do not want to blame you. it is always a try to read other threads.
air coils look like so:
http://www.ultrafinecopperwire.com/s...-inductor.html


the ouput coils are mounted near the terminals of the speakers.
For SE = 2 Speakers in series you use 2x 4ohm speakers per channel?
  Reply With Quote
Old 16th November 2018, 11:21 AM   #7
dzwer is offline dzwer  Bulgaria
diyAudio Member
 
dzwer's Avatar
 
Join Date: Jun 2009
Location: Sofia
This board is with two TDA8954 chips, both in BTL configuration.
I think to convert it to 4 single ended channels.
The speakers are with 8 ohm impedance.
__________________
Nothing moves you like a hydropneumatic Citroen...
  Reply With Quote
Old 16th November 2018, 01:51 PM   #8
IVX is offline IVX  Ukraine
diyAudio Member
 
IVX's Avatar
 
Join Date: Jul 2003
Location: south of China
I see black rings with marking -125 at their pics, it is 99% of probability if sendust cores. If it so, I guaranty THD >.5% ))
__________________
Let's do smth nearly impossible!
E1.
  Reply With Quote
Old 19th November 2018, 08:39 AM   #9
tacoman5000 is offline tacoman5000
diyAudio Member
 
Join Date: Oct 2018
Hi, I bought this exact same board. Just finished recapping with Panasonic FS caps because it arrived with one dented cap so I just replaced everything with much better ones. I'm sorry to not be able to offer any impressions about sound quality though because I have no way to test it right now as I don't have the necessary wires, etc.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.


This person on youtube thoroughly tested this unit:

YouTube

This amp puts out about ~220 watts per channel @ 1% THD.

Last edited by tacoman5000; 19th November 2018 at 08:50 AM.
  Reply With Quote
Old 19th November 2018, 08:50 AM   #10
chermann is offline chermann  Austria
diyAudio Member
 
Join Date: Jan 2017
Location: Vienna
just for the first try:
do not use the Class D amp without load
do not use your good speakers - dummy load = resistor

use some cheap chassis from old spakers or 2nd hand....

often the chinese board use fake caps...its marked normaly with better values --> voltage / capacity
  Reply With Quote

Reply


TDA8954TH - XH-M252 board - anyone?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
My Cambridge 500SE, needs an output board (to replace internal DAC Board) slbender Digital Source 1 11th July 2018 03:43 AM
Unknown Board DC12V TPA3116 amplifier board DIY L163-9 AUS Ben Class D 0 8th December 2016 05:05 AM
Wanted: LM1036 tone board (no ebay or aliexpress board) schdrag Swap Meet 0 2nd December 2016 07:47 PM
problem with tda8954th shahpoori Class D 2 22nd May 2016 06:52 PM
HIFI 700W Subwoofer Mono Amplifier Board By 10 Pairs 1943/5200 Amp Board For Subwoofe nelnar Solid State 2 21st July 2014 07:35 PM


New To Site? Need Help?

All times are GMT. The time now is 05:38 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki