LM386 problems - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Solid State Talk all about solid state amplification.

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 9th January 2010, 05:39 PM   #1
diyAudio Member
Join Date: Jan 2010
Default LM386 problems


Looking for some advice on a problem I am having with the LM386. I am driving a earphone with an impedence of 150 ohms at 1 kHz. The device is well within the thermal disapation for the part. I am seeing this part fail, as it will clip of the positive cycle of the sine wave only, well before I reach the positive rail. This does not happen on all op amps. The bad op amps also draw more Q current than the data sheet states. The part does still work, although distortion is a lot higher, since I am clipping on the positive rail. I do have some small positive offset.
  Reply With Quote
Old 10th January 2010, 09:13 PM   #2
djoffe is offline djoffe  United States
diyAudio Member
Join Date: Oct 2008
Default please post a schematic

too many guesses without looking at your schematic...
  Reply With Quote
Old 15th January 2010, 07:32 PM   #3
gfiandy is offline gfiandy  United Kingdom
diyAudio Member
gfiandy's Avatar
Join Date: Jul 2003
Location: Cambridge UK
It may be unstable, try improving the power supply decoupling.

  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
LM386 projects? MrGuitardeath Instruments and Amps 7 14th March 2012 08:14 PM
Lm386 frenchie29 Chip Amps 10 27th April 2009 09:32 PM
lm386 poweramp prorms Solid State 4 23rd May 2006 07:50 AM
Pleas help!! LM386 Davide82 Chip Amps 3 19th June 2004 10:27 PM

New To Site? Need Help?

All times are GMT. The time now is 08:24 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2