Boost controller for +48VDC? - 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 9th February 2009, 05:27 PM   #1
diyAudio Member
Join Date: Sep 2002
Location: Holly Springs, NC, USA
Send a message via Skype™ to LukasLouw
Default Boost controller for +48VDC?

I need to find a boost controller to drive a switching MOSFET that will allow me to get +48VDC output, and am going a tad bonkers wading thru data sheets from the various semi vendors.

Perhaps someone who has done something similar could advise a part?

Input voltage: +10VDC to +18VDC
Output voltage: +48VDC
Output current: 4.5 amp (external MOSFET probably required, so a healthy drive current is needed)
Output ripple: 200 mV max
Must have a chip enable
Switching frequency in the 500 KHz to 600 KHz range
Max 50% duty cycle
Low side current sensing needed
No input/output isolation required

Any suggestions for a suitable PWM controller for the above would be much appreciated

  Reply With Quote
Old 11th February 2009, 04:03 AM   #2
dtproff is offline dtproff  United States
diyAudio Member
Join Date: Oct 2008
Location: Plano, TX, USA
Standard UC3844 would do fine. you will have to use a transformer if you want to limit the duty cycle to 50%. If you use an inductor in a non-isolated boost then the duty cycle would be around 75% and you would use the UC3842.

  Reply With Quote
Old 11th February 2009, 02:27 PM   #3
star882 is offline star882  United States
diyAudio Member
star882's Avatar
Join Date: Mar 2007
At that power level, a push-pull converter is a better choice. is very close to what you need.
"Fully on MOSFET = closed switch, Fully off MOSFET = open switch, Half on MOSFET = poor imitation of Tiffany Yep." - also applies to IGBTs!
  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
11.5-12.8v to 13.8-14.4v boost star882 Power Supplies 16 19th May 2010 03:13 AM
UcD 180 or UcD 400 with +/- 48VDC supply Ray Weikel Class D 17 7th March 2009 06:11 AM
to boost or not to boost? CharlieM Subwoofers 1 31st January 2009 06:17 PM
[enquiry] Treble Boost/High frequency Boost circuitry elnino86 Parts 2 18th December 2008 12:33 PM
Samsung 1602VFD For CDROM Controller & Remote Volume Controller slowgay Swap Meet 2 22nd November 2008 02:44 PM

New To Site? Need Help?

All times are GMT. The time now is 11:40 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