Go Back   Home > Forums > Amplifiers > Power Supplies

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 November 2005, 05:57 PM   #1
batbat is offline batbat  Austria
diyAudio Member
Join Date: Jul 2005
Location: austria, vienna
Default Halfbridge SMPS with IR2153: Different Halbridge Topologies?


I've made a halfbridge offline SMPS with IR2153 and a pair of IRF740.
It works OK by now, I want to implement some useful current sense now.
While browsing on the net, I found another halfbridge topology, different from the standard one (the second one on my attached pic) using just one C.
I've simulated it with PSpice and after that, tested it on my SMPS.
It works actually quite OK.
Can anybody tell me what is it good for? (well, at least one C less??)

Regards, Emil
  Reply With Quote
Old 6th November 2005, 06:02 PM   #2
sss is offline sss  Israel
diyAudio Member
sss's Avatar
Join Date: Jul 2003
Location: Israel , haifa
Send a message via ICQ to sss
u forgot the pic......
if you are not living on the edge you are taking too much space
  Reply With Quote
Old 6th November 2005, 09:02 PM   #3
batbat is offline batbat  Austria
diyAudio Member
Join Date: Jul 2005
Location: austria, vienna
sorry, here we go:
Attached Images
File Type: png smps.png (2.4 KB, 1321 views)
  Reply With Quote
Old 7th November 2005, 04:36 PM   #4
subwo1 is offline subwo1  United States
diyAudio Member
subwo1's Avatar
Join Date: Jan 2002
Location: North American Continent
One reason for using two capacitors is series is to lower the capacitor voltage rating requirement for the decoupler capacitor which usually needs to be connected across the MOSFET totem pole from the top MOSFET drain to the lower one's source. Otherwise it may be OK to connect the second capacitor directly from top drain to lower source.
  Reply With Quote
Old 27th November 2009, 01:21 PM   #5
diyAudio Member
Join Date: Nov 2004
Location: Zaporozhye
Send a message via ICQ to Kuzmenko
I`ve build a couple smps via #2 circuit. 1uF/250VAC capacitor with added 6 uH inductance in series with capacitor for resonance with 1st harmonic.
40kHz. works ok.
  Reply With Quote
Old 27th November 2009, 04:41 PM   #6
luka is online now luka  Slovenia
diyAudio Member
luka's Avatar
Join Date: Sep 2005
Location: in Slovenia :)
Send a message via Skype™ to luka
1st is good for both 115/230Vac operation if I am not mistaken. C2,C3 are those big caps you find in PC supplys (~470uF/200v)
  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
Can I replace transformer drive with optocoupler in halfbridge smps? lakone Power Supplies 1 11th May 2009 02:20 PM
IR2153 sub SISKO Power Supplies 0 10th May 2008 02:15 PM
Ir2153 m-tech Power Supplies 2 15th December 2007 01:02 PM
Offline halfbridge smps gate drive fortissimo68 Power Supplies 54 6th December 2007 11:21 AM

New To Site? Need Help?

All times are GMT. The time now is 06:50 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