Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

psu step up advice required
psu step up advice required
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 16th January 2020, 08:31 AM   #1
goodguys is offline goodguys  United Kingdom
diyAudio Member
 
Join Date: Feb 2011
Default psu step up advice required

Hi. Is there any way to convert a 12 volt dc power supply to + 20/-20 dual symmetrical


I have an amp which needs +/- 19-23 volts dual symmetrical psu 1500watts, which is going to be expensive but i have a quality pc atx corsair 1500 watts single 12 volts dc supply and am wondering if this can be modified and used.


Any advice most gratefully appreciated. Many thanks
  Reply With Quote
Old 16th January 2020, 08:48 AM   #2
Tromperie is offline Tromperie  Australia
diyAudio Member
 
Join Date: May 2015
Location: Melbourne
Is this for a public address system or a concert? Otherwise, why do you need that much power?
__________________
Source: LMS 7.9.2 on FreeNAS, PiCorePlayer * Storage: FreeNAS 11 * DIY PGA2310 * Amps: 8 x LM3886TF
Xover: 24dB @ 300 and 3kHz * Speakers: CNC cut 54 laminations * SB 10", SB 5", VIFA 1" * Remote: Squeeze Control
  Reply With Quote
Old 16th January 2020, 02:30 PM   #3
FauxFrench is offline FauxFrench  France
diyAudio Member
 
Join Date: Dec 2017
Location: The mountains, calm and quiet.
You can convert almost any voltage into any other voltage as long as you have sufficient power, but it can be very cumbersome and expensive.
For a start, an amplifier being supplied with +/-19-23V and consuming 1500W is operating a VERY low impedance load. Are you really sure this power level is right?
  Reply With Quote
Old 16th January 2020, 02:37 PM   #4
picowallspeaker is offline picowallspeaker  Italy
diyAudio Member
 
picowallspeaker's Avatar
 
Join Date: Apr 2007
Most of car audio amplifiers utilize a SMPS/PWM to do that from the battery voltage.
The hard thing to DIY is the step-up transformer
Many mosfets (or darlington Bjt ) in push pull or SE, driven by some IC > optoisolator for Vref

( I remember from the magazines such Elektor, in the late '80s)
__________________
It's like learning sex during the Victorian era: you get to the wedding night and there are many things to do that you never imagined.
  Reply With Quote
Old 16th January 2020, 05:22 PM   #5
Osvaldo de Banfield is offline Osvaldo de Banfield  Argentina
diyAudio Member
 
Osvaldo de Banfield's Avatar
 
Join Date: Dec 2011
Location: Barrio Garay,Almirante Brown, Buenos Aires, Argentina
IMHO the best way is to build a SEPIC+Cuk converter. Isolated (In the sense that id the switch fails shorted, doesn't destroy the load) and very well tracking. No ground isolating.
__________________
Osvaldo F. Zappacosta. Electronic Engineer UTN FRA from 2001.
Argentine Ham Radio LW1DSE since 1987.
  Reply With Quote

Reply


psu step up advice requiredHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
A bit of DIY advice required john jones Headphone Systems 4 12th July 2012 07:52 AM
Building a gc amp, advice required. Jointdead Chip Amps 7 3rd January 2012 08:06 PM
quad advice required johniss0001 Solid State 0 28th July 2008 11:14 PM
required specs of an input step up transformer, into a 45, to allow it drive an 845 rick57 Tubes / Valves 18 21st September 2006 11:16 PM


New To Site? Need Help?

All times are GMT. The time now is 06:34 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Copyright ©1999-2020 diyAudio
Wiki