Ne5532 Op Amp real world max voltage? - diyAudio
Go Back   Home > Forums > Design & Build > Parts

Parts Where to get, and how to make the best bits. PCB's, caps, transformers, 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 23rd October 2003, 03:59 AM   #1
sounder is offline sounder  Canada
diyAudio Member
 
Join Date: Sep 2003
Location: Toronto
Default Ne5532 Op Amp real world max voltage?

I've built an active subwoofer filter using a NE5532P op amp and my rail voltages are +22V/-22V. I haven't connected the PS to the board yet. I know some chips have higher tolerances than specified. Anyone overvoltaged (a word?) this chip and survived Am I really pushing it this time?

Thanks,

David
  Reply With Quote
Old 23rd October 2003, 10:36 AM   #2
DRC is offline DRC  United Kingdom
diyAudio Member
 
DRC's Avatar
 
Join Date: Jan 2003
Location: UK (south west)
According to the data sheet I saw (RS web site) this chip is rated for supply to +/- 22 v so you are within spec ...

(another) Dave
  Reply With Quote
Old 23rd October 2003, 12:12 PM   #3
sounder is offline sounder  Canada
diyAudio Member
 
Join Date: Sep 2003
Location: Toronto
Quote:
Originally posted by DRC
According to the data sheet I saw (RS web site) this chip is rated for supply to +/- 22 v so you are within spec ...

(another) Dave

Thanks Dave, I'm firing her up
David
  Reply With Quote
Old 23rd October 2003, 12:16 PM   #4
diyAudio Member
 
Join Date: Sep 2002
Location: Sweden
Check first that you rails really are at +/-22V, unless you have
already done so. I just mean, if the PSU is designed to give that
voltage, it will also have a tolrance and may give a higher
voltage.
  Reply With Quote
Old 23rd October 2003, 01:11 PM   #5
sounder is offline sounder  Canada
diyAudio Member
 
Join Date: Sep 2003
Location: Toronto
Quote:
Originally posted by Christer
Check first that you rails really are at +/-22V, unless you have
already done so. I just mean, if the PSU is designed to give that
voltage, it will also have a tolrance and may give a higher
voltage.

+/- 22V is the actual voltage. I noticed the op amp pec is 22V maximum. Do you think that will be an issue.

It's easier to buy a smaller transformer than desolder the op amp
  Reply With Quote
Old 23rd October 2003, 01:15 PM   #6
diyAudio Member
 
Join Date: Sep 2002
Location: Sweden
No, it is probably OK then.
  Reply With Quote
Old 23rd October 2003, 01:21 PM   #7
sounder is offline sounder  Canada
diyAudio Member
 
Join Date: Sep 2003
Location: Toronto
Quote:
Originally posted by Christer
No, it is probably OK then.

Thanks for the input
David
  Reply With Quote
Old 23rd October 2003, 02:35 PM   #8
diyAudio Moderator Emeritus
 
jean-paul's Avatar
 
Join Date: Sep 2002
Location: Germany
It is unwise to run components at their absolute maximum ratings. You are NOT running it within specs as another member posted, you'll be running it at absolute maximum. So no safety margin. Check datasheets and draw conclusions please. Most critical will be power on sequence when voltages might be higher than +/- 22 V for a short ( but effective ) while. This will certainly be the case if you have a unregulated supply and it will occur with regulators too in a smaller degree.

I would lower the voltage to + and - 21 or 20 V just to be safe on the long term. You've been warned anyway...
__________________
It's only audio. Official member of the Norske Brillegeit Gang.
  Reply With Quote
Old 23rd October 2003, 02:51 PM   #9
diyAudio Member
 
Join Date: Sep 2002
Location: Sweden
Jean-Paul
You are right, of course, and if it had been a new design, still
on paper only, I would have advised against using 22V.
Running them at the max limit, not over mind you, will probably
only give a slightly increased risk of failure. As I understand it,
the guy already has built this thing, so considering these op
amps cost next to nothing to replace, should they fail, I doubt
it is worth rebuilding the PSU.

I might be wrong, though.
  Reply With Quote
Old 23rd October 2003, 03:28 PM   #10
diyAudio Moderator Emeritus
 
jean-paul's Avatar
 
Join Date: Sep 2002
Location: Germany
Only 2 diodes can be enough. I'd prefer a more elegant way though.

Changing/adapting the PSU will be cheaper than replacing a burnt subwoofer....
__________________
It's only audio. Official member of the Norske Brillegeit Gang.
  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
TDA7052A - power, & (real world) heat levels ...Sanity Check sought! HankMcSpank Chip Amps 8 11th August 2009 12:17 PM
What about NE5532? rhavecilla Chip Amps 12 6th September 2007 03:05 PM
PCM1794 vs. PCM1798 in the real world? niles Digital Source 10 14th May 2007 03:27 PM
How well does noise measurement in spice match real world? sonnya Solid State 3 10th November 2003 07:45 PM


New To Site? Need Help?

All times are GMT. The time now is 01:32 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