Gainclone driving inductive loads - 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 11th April 2004, 06:55 PM   #1
diyAudio Member
 
Join Date: Nov 2001
Location: Malaysia
Default Gainclone

Has anyone tried using gainclone chips LM3875/2875 to drive small inductive loads? I'm thinking using one to drive a small 30VA toroid transformer in a power regeneration project.



ckt
  Reply With Quote
Old 12th April 2004, 09:53 AM   #2
adx is offline adx  New Zealand
diyAudio Member
 
Join Date: Mar 2004
Location: Christchurch
I've done similar things. It should work well, an inductive load is a naturally easy load for an amplifier chip. The chips are overcurrent and overtemperature limited so they are reasonably robust.

A couple of caveats:

I ran into HF oscillation problems - normal GC precautions (Zobels, not running at low gain, short FB path etc) should see it work well.

Watch out for the low DC resistance of the transformer. Even a small offset voltage will cause a reasonable DC current to flow, and toroids saturate very easily. Some way of tweaking out the offset might help (see National appnotes).
  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
When driving low impedance loads, what is the killer? - Prevention? CBRworm Solid State 25 6th April 2009 01:09 PM
Behringer DEQ ok driving multiple loads brucemck2 Subwoofers 0 18th January 2006 09:49 PM
Driving Low Impedance Loads weinstro Solid State 14 8th May 2005 09:53 PM
Zen driving high impedance loads supa-roo Pass Labs 2 18th April 2003 07:23 PM
Best amp choice for driving NASTY speaker loads stokessd Pass Labs 8 25th March 2003 11:32 PM


New To Site? Need Help?

All times are GMT. The time now is 11:51 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