A small help on a SMPS - diyAudio
Go Back   Home > Forums > General Interest > Car Audio

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 12th July 2003, 12:40 PM   #1
MaXiZ is offline MaXiZ  Italy
diyAudio Member
 
MaXiZ's Avatar
 
Join Date: Jun 2003
Location: Italy
Send a message via ICQ to MaXiZ
Default A small help on a SMPS

I've build all the circuit my problem is on the transformer...
I've "destroyed" a burned transformer for 220AC to 12VDC (B) and naturally rewinded the "spin(??)". But with a tester i've at the output +6 instead of -37 and +20 instead of +37... The question's are:
1)Wrong type of winding? Should i rewind as a type A or B for this kind of application?

2)Is it suitable for this kind of application? Or MUST i use a type-A transformer?

3)Is it adaptable for this kind of application? For example by cutting the plastic fins(swings? Divider? i don't know the right word sorry! :P)

4)The buz11 become ver very hot. Don't checked but i think around 60C.. Is it normal?

Any comment will b very appreciated.. remember that i'm a beginner so don't talk much difficult!

Click the image to open in full size.
  Reply With Quote
Old 13th July 2003, 10:11 AM   #2
MaXiZ is offline MaXiZ  Italy
diyAudio Member
 
MaXiZ's Avatar
 
Join Date: Jun 2003
Location: Italy
Send a message via ICQ to MaXiZ
Default additional info

sorry the image which i refer is this...
Click the image to open in full size.
  Reply With Quote
Old 19th July 2003, 06:24 AM   #3
diyAudio Member
 
weinstro's Avatar
 
Join Date: May 2003
Default SMPS response

It's not clear from the diagrams you've posted, how you're intending to use the transformer.

I'll assume that the SG3524 is going to either switch a power MOSFET, or switch the transformer coils directly. In the latter case, you won't get a whole lot of power out of this.

In either case, this might be using the wrong type of transformer. Normally, SMPS are switched at very high frequencies, >20kHz. At these frequencies, iron lamination based transformers don't work well, and typically ceramics or ferrites are used.

The websites of http://www.mag-inc.com and http://www.linear-tech.com are great websites with sufficient design and app notes to get you going.

Good luck,

Rob Weinstock
  Reply With Quote
Old 1st August 2003, 01:00 PM   #4
diyAudio Member
 
Hi Speed's Avatar
 
Join Date: Sep 2002
Location: PR
Hi maxiz

maybe the next link help you http://www.eatel.net/~amptech/elecdisc/trnsfrmr.htm

Hi speed
__________________
Hi Speed
Thanks
  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
small-signal (small-power) fast switching complementary transistors Lola Luna Solid State 3 8th April 2010 07:51 PM
Simple 12V SMPS for small powered devices EWorkshop1708 Power Supplies 16 13th April 2008 10:46 PM
small smps with uc3844 Tekko Power Supplies 37 27th October 2006 03:08 PM
Small SMPS problem MaXiZ Class D 18 5th January 2004 02:32 PM
Small Car SMPS needed.. deepanger Solid State 6 10th June 2003 01:48 PM


New To Site? Need Help?

All times are GMT. The time now is 09:12 PM.


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