Step down SMPS transformer in reverse

[bongkk]

smps transformer

Can a SMPS ferrite-core tranformer used in reverse? Eg. can a 230v/ 12v SMPS transformer used in reverse (assuming that the same switching frequency is used) to get 12v stepped up to 230v? as anyone try it out? Thanks.

 

[smd_lover]

step by step smps

Yes, i tried it with a transformer out of a PC power supply.

The 2 high voltage windings i have put in series. But i only got 100 Volts out of it....

 

[rajudp]

step down transformer for smps

the universal power supply operated at 85-270v and if you reversed the sides the step up voltage will not be that much high.

 

[bongkk]

using transformer in reverse

smd_lover:
Were you using push-pull configuration at the primary input? Some psu output use half-wave rectification.

radujp:
You got a point there.

May be we have to double the pri. voltage.

Thanks for you response.