High Current Power Supply (no big transformer)

[Al1B]

ive been recently looking for a transformer with 220v input and with (-35 GND +35) output with the current: about 12A

in my area i didnt find such a thing, and went trought the troubles of transformer wiring and much more....

can anyone tell me how can a 'pc power supply' provide such current and in fact theres no big transformer in it....

[stratus46]

Originally Posted by Al1B

ive been recently looking for a transformer with 220v input and with (-35 GND +35) output with the current: about 12A

in my area i didnt find such a thing, and went trought the troubles of transformer wiring and much more....

can anyone tell me how can a 'pc power supply' provide such current and in fact theres no big transformer in it....

PCs use switching power supplies. The high frequencies used need far smaller power transformers for a given power.

Toroids are lighter than traditional 'EI' core transformers for a given power level, not as much as a switcher but worth looking into. Check out

Antek - Your reliable source of transformers, power supplies, and more.

G²