TDA8954 output filter - 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
Thread Tools Search this Thread
Old 28th January 2011, 04:46 PM   #1
riktw is offline riktw  Netherlands
diyAudio Member
Join Date: Sep 2007
Default TDA8954 output filter


i am busy with a TDA8954 PCB.
the TDA8954 looks like a fairly easy IC for a high power amplifier.
PCB design should work out, PCB will be professionally made in china (so cheap )
but one thing bothers me, the output filter, especially the inductors.
i can imagine these should be able to withstand some serious currents.
i want to make a stereo amplifier for 4 ohm speakers, so roughly 200 watts per channel.
but a classmate wants to make a BTL version of it (8 ohm 400 watts)
what coils are good for this kind of currents?

when looking trough the coilcraft site i found two types look promising:
Coilcraft PCV-1 Vertical Mount Power Chokes
Coilcraft VER2923 High Current Power Inductors

would one of those types be good enough to handle high currents and have decent audio performance?

datasheet TDA8954:

  Reply With Quote
Old 28th January 2011, 08:20 PM   #2
beun is offline beun  United States
diyAudio Member
Join Date: Feb 2010
The VER2923 looks like a good candidate with a nice flat inductance versus current curve, seems shielded too. I didn't see a place where you can buy them though.
  Reply With Quote
Old 28th January 2011, 08:34 PM   #3
riktw is offline riktw  Netherlands
diyAudio Member
Join Date: Sep 2007
i kind of sampled 4 to try them hehe
  Reply With Quote
Old 29th January 2011, 12:42 AM   #4
diyAudio Member
nigelwright7557's Avatar
Join Date: Apr 2008
Location: Carlisle, England
The main problem I have found with class d output inductors is some of them cook far too easily.

I bought a selection and used the best one from then on.
One of the poor ones ran at 180 degrees C !
PCBCAD51 pcb design software.
  Reply With Quote
Old 30th March 2015, 10:28 PM   #5
diyAudio Member
Join Date: Mar 2015
Dear Nigel,

using your previous experience, please could you help me to select the best inductor regarding effectiviness, in order to decrease the temperature on it? I'm suffering a lot to find the right inductor matching with the TDA8954.

Thanks in advance.
  Reply With Quote


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
Inductors for output filter bernroth Class D 5 14th April 2010 01:22 PM
Output filter Skorpio Class D 5 8th August 2008 06:44 PM
Output filter m-tech Class D 11 22nd September 2007 07:04 AM
What matrial for output filter? lumanauw Class D 62 16th March 2005 05:15 AM
output LR filter Helix Solid State 7 8th February 2002 12:08 PM

New To Site? Need Help?

All times are GMT. The time now is 07:19 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd.
Copyright 1999-2015 diyAudio

Content Relevant URLs by vBSEO 3.3.2