UPC1237 speaker protection - diyAudio
Go Back   Home > Forums > Amplifiers > Chip Amps

Chip Amps Amplifiers based on integrated circuits

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 9th January 2012, 01:33 AM   #1
jazzlap is offline jazzlap  Canada
diyAudio Member
 
Join Date: Jan 2012
Location: Near Montréal, Québec
Default UPC1237 speaker protection

Hi everyone,

I just finish my TDA2050 30W/channel amp and it works very well. Now I am just about to add a UPC1237 chip for speaker protection and here is my problem.

The datasheet of the UPC1237 sais that the overload detection fonction is not avalaible (on pin 1)

Can anybody help me with this.

Is there a external circuit that I could connect to this chip in order to give my amp an overload detection fonction?

Thanks
  Reply With Quote
Old 9th January 2012, 03:45 PM   #2
diyAudio Member
 
Join Date: Sep 2009
Location: Pretoria
That's a great question. I've searched far and wide, but no avail.
I'm sure someone on the forum will be able to help us.
  Reply With Quote
Old 9th January 2012, 04:28 PM   #3
diyAudio Moderator
 
pinkmouse's Avatar
 
Join Date: Apr 2002
Location: Chatham, England
As always, Jan Didden is way ahead of us all.

http://www.linearaudio.nl/SOA-1.htm
__________________
Rick: Oh Cliff / Sometimes it must be difficult not to feel as if / You really are a cliff / when fascists keep trying to push you over it! / Are they the lemmings / Or are you, Cliff? / Or are you Cliff?
  Reply With Quote
Old 18th January 2012, 05:50 AM   #4
diyAudio Member
 
Join Date: Sep 2009
Location: Pretoria
The link is about SOA??????
  Reply With Quote
Old 18th January 2012, 06:39 AM   #5
diyAudio Moderator
 
pinkmouse's Avatar
 
Join Date: Apr 2002
Location: Chatham, England
Yes.
__________________
Rick: Oh Cliff / Sometimes it must be difficult not to feel as if / You really are a cliff / when fascists keep trying to push you over it! / Are they the lemmings / Or are you, Cliff? / Or are you Cliff?
  Reply With Quote
Old 19th January 2012, 03:58 AM   #6
diyAudio Member
 
Join Date: Jul 2003
Location: Dona paula, Goa
There is a clip detector circuit on the leach amp site. Knowing the IC functionality, u can use this ckt, IMO, but not sure.

Gajanan Phadte
  Reply With Quote
Old 19th January 2012, 08:01 AM   #7
diyAudio Member
 
jan.didden's Avatar
 
Join Date: May 2002
Location: Great City of Turnhout, Belgium
Blog Entries: 7
Quote:
Originally Posted by jazzlap View Post
[snip]The datasheet of the UPC1237 sais that the overload detection fonction is not avalaible (on pin 1)
[snip]Thanks
What they mean is that the overload detection circuitry is proprietory so they can't show it.
Pin one is a switching input that will switch off the relay when it is taken high. It's up to you to design a circuit that will make pin 1 high when there is an overload condition.

BTW Clipping is not understood as overload in the context of these kind of circuits - clipping is simply defined as 'clipping'

jan didden
__________________
If you don't change your beliefs, your life will be like this forever. Is that good news? - W S Maugham
Check out Linear Audio!
  Reply With Quote
Old 19th January 2012, 10:50 AM   #8
diyAudio Member
 
Join Date: Jul 2003
Location: Dona paula, Goa
Overload protection needs speaker/ic current detection. You have to include a resistor(of small value) either in series with the speaker or the power rails, one on each rail and detect the drop across each. Then use a comparator or opamp circuit.

Gajanan Phadte
  Reply With Quote
Old 19th January 2012, 02:25 PM   #9
jazzlap is offline jazzlap  Canada
diyAudio Member
 
Join Date: Jan 2012
Location: Near Montréal, Québec
thank janneman,
Now what will happen if I connect pin 1 directly to the ground.
  Reply With Quote
Old 20th January 2012, 04:39 AM   #10
diyAudio Member
 
Join Date: Jul 2003
Location: Dona paula, Goa
It's time for u to read some fundas
  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
speaker protection audiofan Solid State 0 19th February 2009 02:35 PM
Speaker protection help ronjodu Chip Amps 9 16th July 2007 11:49 PM
speaker protection (OR) overload protection myanmar Solid State 7 13th July 2006 08:21 AM
FS: Niles HDS-6L speaker selector w/ speaker protection. Spasticteapot Swap Meet 0 27th May 2006 11:14 PM


New To Site? Need Help?

All times are GMT. The time now is 05:09 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