need smps transformer specification?

[ambi]

hiiii everyone,:grin:

I am designing the 5v 1a ouput adapter
please suggest me the smps transformer design
i am using 13001 transistor for switching and i don't know the operating frequency


Thank you

 

[KlausST]

Hi,

you definitely need to know SMPS technique and switching frequency.
Against usual 50/60Hz transformers you can´t buy SMPS transformer, because they are mostely custom made.

But you could make your own.... If you have enough data.


Klaus

 

[ambi]

yeah what all data's might be required for designing the smps?

 

[asdf44]

That's a pretty small supply in a pretty common output.. There should be fully off-the-shelf solutions for isolated supplies in that range. If you need custom, the next step would be to find a controller IC intended for that application. There is a good chance you can find an app note for a complete solution, perhaps including transformer part numbers if you take a look at some manufacturer's websites. TI would be a good one, intersil, linear and several others would be good too.

Even if you need to go totally custom you don't want to re-invent the wheel, app notes and datasheets are a fantastic source of information for something like this.

 

[mrdevil83]

Hello.

How about a flyback smps with tny264, tl431 and pc817?

 

[ambi]

Hello.

Could you please suggest me the design without using any IC's?

 

[FvM]

You have to go back 30 or 40 years in circuit design to find a suitable discrete transistor circuit. Not intended as an actual suggestion rather than illustrating possible techniques, see a design for a portable TV power supply from the "1976-77 Siemens Schaltbeispiele" (circuit examples).