LM3886 Chip Amp Getting VERY HOt - Page 3 - diyAudio
Go Back   Home > Forums > Amplifiers > Chip Amps
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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
Thread Tools Search this Thread
Old 6th January 2014, 06:03 PM   #21
diyAudio Member
Michael Bean's Avatar
Join Date: Sep 2004
Location: Minneapolis, Minnesota, USA
That transformer will work just fine.

  Reply With Quote
Old 7th January 2014, 03:27 PM   #22
diyAudio Member
danielwritesbac's Avatar
Join Date: Nov 2007
Dual secondary transformer with 8 of 4a diodes is okay, a bit max, but okay.
Center tap transformer with 4 of 10a diodes is okay and quite similar.
Center tap transformer with 4 of 4a diodes--those diodes aren't strong enough.

Next, the most common cause of overheating is too many duplicate grounds, aka ground loops. See Decibel Dungeon website for a briefing on star grounding.

You can: Strongly connect PG+ to PG- at the output of the power supply board to create a central ground, the 0V. You'll be needing a 0V.
Run one (1) wire from the 0V to each amplifier's CG port.
Run one (1) wire from the 0V to the speaker jack negative.
Now most of the ground loops are gone. It will probably quit overheating.
DIY Models & AppsClipNipperLM1875TDA7293Powerful Parallel TDA7293 kit ♦ My post has opinion.
  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
LM3886 chip amp help danielnaveen Chip Amps 31 31st January 2011 02:33 PM
First chip amp - lm3886 agithegreat Chip Amps 31 5th April 2010 03:35 PM
Chip amp lm3886 help needed!!! kanifee Chip Amps 7 23rd June 2008 09:01 PM
My LM3886 chip amp Denis.BR Chip Amps 13 19th October 2007 02:15 PM
My LM3886 Chip Amp bhk Chip Amps 9 22nd March 2006 12:33 AM

New To Site? Need Help?

All times are GMT. The time now is 01:51 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