SMPS - Design Help with Current Limitations

[Prabakaran]

Hi All,

I need to design a SMPS with 5V dc Output with 2A Current ratings .

And i have a doubt how we are determing the Current Ratings and How we are Achieving it.

By Use of Transformer what we are using in design or Some other Components ?

Please Elaborate me to start with the design .

Regards
Prabhakaran.

 

[shreyas_patel21]

you can use step down transformer of 220V ac to 6 v ac of 2amp ratings
then use diodes as rectifier
then capacitor for filtering noise and smooth output
then any voltage regulator or divider circuit for 5V

i think this is the basic idea

 

[Prabakaran]

Hello shreyas_patel21

I Know the Basic Design . Please Refer me the Using the Pulse Transformer design of SMPS. Have a Look of the Attached Image . I need to design of SMPS Like this.

 

[leo_o2]

Input is 220V AC? Current rating for input stage is different from that of output stage. If your output loading is 1A, you can design 2A for rating at output stage. For 220V input stage, current rating can be calculated: 2A*5V/220V.

 

[qayyoum]

hi i think you need this circuit check it