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-   -   +12V (10A) and -12V (0.3A) rating supply question (http://www.diyaudio.com/forums/power-supplies/227003-12v-10a-12v-0-3a-rating-supply-question.html)

iinself 4th January 2013 03:22 AM

+12V (10A) and -12V (0.3A) rating supply question
 
Hi,
a beginner question - can somebody please explain what would be the max current I can draw from a PSU that has one line with 12V (10A) and another line with -12V (0.3A) if I connect these 2 lines to a load? Would I be able to get 10A or will I get only 0.3A ?

Thank you
Arvind

DUG 4th January 2013 05:10 AM

Do you mean like 24V ct @ 0.3A ?

wahab 4th January 2013 05:55 AM

Quote:

Originally Posted by iinself (Post 3310214)
Hi,
a beginner question - can somebody please explain what would be the max current I can draw from a PSU that has one line with 12V (10A) and another line with -12V (0.3A) if I connect these 2 lines to a load? Would I be able to get 10A or will I get only 0.3A ?

Thank you
Arvind

0.3A

iinself 4th January 2013 03:48 PM

Thanks DUG , wahab.

So is it possible to convert 12V(10A) to say 24V (2A) using some simple circuit? Any help appreciated.

Thanks

DF96 4th January 2013 07:04 PM

Convert - yes. Simple - no. Google DC-DC converter. It will normally involve big capacitors or inductors, and semiconductor switches.

iinself 26th January 2015 03:51 PM

Quote:

Originally Posted by DF96 (Post 3311136)
Convert - yes. Simple - no. Google DC-DC converter. It will normally involve big capacitors or inductors, and semiconductor switches.

I purchased an assembled unit for $4. Nice deal, works well.

DF96 27th January 2015 04:28 PM

I assumed DIY!

infinia 27th January 2015 10:25 PM

Quote:

Originally Posted by DF96 (Post 4201448)
I assumed DIY!


have you seen the prices of those things? you cant even DIY for that!

sreten 27th January 2015 10:35 PM

Hi,

It might be easier to use a car BTL type amplifier running
off the 12V than doubling the 12V for a standard amplifier.
The net result will be about the same, and the BTL won't
need the output capacitor that 24V single rail needs.
Car type BTL chip amplifiers are very mature.

rgds, sreten.

DF96 28th January 2015 11:29 AM

Quote:

Originally Posted by infinia
have you seen the prices of those things? you cant even DIY for that!

True, but he did ask for a circuit - not a black box.


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