2kw pull-push offline smps - Page 2 - diyAudio
Go Back   Home > Forums > Amplifiers > Power Supplies
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 August 2012, 05:40 PM   #11
Join Date: Jun 2011
This problem can be totally avoided by using a half bridge driver that has a capacitor in series with the primary winding to continually adjust transformer imbalance.

This has been widely discussed on this forum before

If you have a cap in series with pri then you MUST use voltage mode only.

And if you use voltage mode then what happens when it goes on overload.......well, it goes into cycle by cycle current limit, because all voltage mode half bridges need a pri current limit.......and when you go into cycle by cycle current limit then your half bridge rail splitter cap voltage drifts, which means you need to size the splitter caps for the full rail voltage which meakes them very very expensive.

Without a series cap you need to be in current mode with a half bridge.......but if in current mode then you need to have "average current mode" as per the LM5039....otherwise you rail splitter cap voltage will drift again


So i would choose full bridge over half bridge, unless you use the LM5039.
  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
12V push pull SMPS Archimedes Power Supplies 151 11th August 2008 10:39 AM
SMPS versus Push-Pull? DJ Exprice Power Supplies 2 29th December 2006 04:07 AM

New To Site? Need Help?

All times are GMT. The time now is 09:26 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