psu step up advice required

[goodguys]

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

 

[Tromperie]

Is this for a public address system or a concert? Otherwise, why do you need that much power?

 

[FauxFrench]

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?

 

[picowallspeaker]

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)

 

[Osvaldo de Banfield]

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.