ta2020 anti "pop noise" relay - really needed? - 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 17th July 2011, 10:13 PM   #1
yakideo is offline yakideo  Poland
diyAudio Member
 
Join Date: May 2010
Default ta2020 anti "pop noise" relay - really needed?

Hello,

For the past months I've been designing a pcb for the tripath ta2020. I have read almost all information there is on this particular amp. One thing that however troubles my mind is the so called "pop noise" when turning on/off the amplifier. According to the datasheet the ta2020 has build in "turn-on & turn-off pop suppression". My question, is the build in pop suppression any good or should I invest in a solution involving a relay?
  Reply With Quote
Old 17th July 2011, 10:27 PM   #2
diyAudio Member
 
nigelwright7557's Avatar
 
Join Date: Apr 2008
Location: Carlisle, England
I cant speak for the 2020 but the irs2092 randomly pops on power off.
For some reason some chips do it and others dont.
The reset circuit is only one capacitor so its hard to get wrong !
__________________
PCBCAD50 software. http://www.murtonpikesystems.co.uk
  Reply With Quote
Old 17th July 2011, 11:32 PM   #3
diyAudio Member
 
Join Date: Sep 2004
Location: Minneapolis, Minnesota, USA
Don't forget that anything you connect to it's input might also cause pops, so it's a good idea to use anti-pop measures in any case.

Mike
  Reply With Quote
Old 18th July 2011, 12:38 AM   #4
yakideo is offline yakideo  Poland
diyAudio Member
 
Join Date: May 2010
Quote:
Originally Posted by nigelwright7557 View Post
The reset circuit is only one capacitor so its hard to get wrong !
What kind of reset circuit are you talking about?

Quote:
Originally Posted by Michael Bean
Don't forget that anything you connect to it's input might also cause pops, so it's a good idea to use anti-pop measures in any case.
A delay circuit would stop the pop noise on power up but what kind of circuit could prevent pops when connecting an audio source?
  Reply With Quote
Old 18th July 2011, 12:41 AM   #5
diyAudio Member
 
nigelwright7557's Avatar
 
Join Date: Apr 2008
Location: Carlisle, England
Quote:
Originally Posted by yakideo View Post
What kind of reset circuit are you talking about?
The IRS2092 has a capacitor on its reset input.
This sets the time constant for the reset cycle.
__________________
PCBCAD50 software. http://www.murtonpikesystems.co.uk
  Reply With Quote
Old 18th July 2011, 03:28 AM   #6
diyAudio Member
 
Join Date: Sep 2004
Location: Minneapolis, Minnesota, USA
I was talking about anything connected to an amplifier input will cause noise when it's turned on or off. A way of disconnecting and protecting speakers will prevent that. Take a look at this for ideas.

Loudspeaker Protection and Muting

Mike
  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


Similar Threads
Thread Thread Starter Forum Replies Last Post
"Gold pin" Texas Instr. tripath TA2020 chips? charliefreak100 Class D 0 7th June 2011 10:30 PM
CS4398 evaluation board schematic - Values for R and C's marked with "NO POP" Groundloops Digital Source 4 5th April 2011 11:55 AM
Reduce "pop" noise when power on/off veckans Class D 11 28th January 2009 09:53 AM
here "pop" there "pop" pls help! tone Digital Source 7 30th May 2003 07:17 PM
Need help with IC Based Amplifier "pop" problem (Integrated Component) Monolith Solid State 7 13th March 2003 03:01 PM


New To Site? Need Help?

All times are GMT. The time now is 12:22 PM.


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