tl494 smps, inductor wire curiosity - diyAudio
Go Back   Home > Forums > General Interest > Car Audio
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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 27th July 2009, 03:03 AM   #1
zuzu is offline zuzu  United States
diyAudio Member
Join Date: Jul 2009
Default tl494 smps, inductor wire curiosity

Hello friends,

Just playing with some 18V/4A DC-DC with TL494 and works nice (read stable from now on). Topology is boost, single MOSFET and I just added a secondary coil coupled with main inductor so I guess it became some flyback design. These because I needed to lower output under 12V for other future use and also some isolation. So now input is 12V and output adjustable 6...20V at several amps.

Ok, most trouble was of course main inductor and I choose for testing several ready made chokes from PC SMPS or other PSU, measured in range of 20...150uH. Almost all worked nice (tuned each from controller PWM freq.) but when I made my own inductor for bigger current, all kind of audible sounds came from it. Also scope mounted in MOSFET grid shown ugly jitter on PWM.

Curiosity is the core was from the same junk SMPS, no mater I glued the winding, etc. I used some isolated cooper wire from a 60Hz trafo. When I made inductor with wire recovered from SMPS chokes, much improvement was observed.

So does the wire (quality) count so much ??? Or what's happening?

Best regards,
  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
car smps based on TL494 himanshuraval Car Audio 54 5th January 2013 02:45 AM
litz inductor wire for speaker wire. fazman Everything Else 126 20th June 2011 02:48 PM
SMPS noises with TL494 Todor Power Supplies 20 15th July 2005 11:56 PM

New To Site? Need Help?

All times are GMT. The time now is 07:09 AM.

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