want to make 5 volt 2 Amp DC power supply, plz help

[P Rathod]

Hello Friends,
If anybody can advice me about my issue, i want to built a dc power supply of 5 volt and 2 Amp of current as a DC output.What should i do..



Thank you

 

[NorthGuy]

Do you want to build it, or do you simply need it for your project? If you simply need the supply, the easiest way is to find an old wall-wart.

 

[P Rathod]

Thank you for quick reply,
I want to build it, so from where i should start.

 

[ronv]

Do you want it to plug into the wall or run from a battery?

 

[P Rathod]

i want to plug it into wall.

 

[Zerotolerance]

ENEF

 

[4pyros]

OK what is it to be used for?

 

[alec_t]

Does the supply need tight regulation of the voltage or current? What tolerance? Linear or SMPS?

 

[Reloadron]

i want to plug it into wall.

Since you do not list a location we have no idea what your wall outlet voltage is? Additionally, since you don't list a location it makes it difficult to call out the parts since I don't know what your source of parts is?

Thus if you want a regulated 5 volts I suggest you start with a regulator like the LM 323. The data sheet will tell you how tight it regulates and show some basic circuit drawings. The LM 323 with a heat sink is good for 3 Amps so should meet your needs. You will also need a transformer, filter capacitors and some hardware.

Ron

 

[P Rathod]

Since you do not list a location we have no idea what your wall outlet voltage is? Additionally, since you don't list a location it makes it difficult to call out the parts since I don't know what your source of parts is?

Thus if you want a regulated 5 volts I suggest you start with a regulator like the LM 323. The data sheet will tell you how tight it regulates and show some basic circuit drawings. The LM 323 with a heat sink is good for 3 Amps so should meet your needs. You will also need a transformer, filter capacitors and some hardware.

Ron

 

[P Rathod]

that will help full to me,
i want to use this ckt to charge my tablet samsung tab2. and specification of charger of tablet said it is 5 v 2 amp .........
so do i follow the same LM 323

 

[Reloadron]

that will help full to me,
i want to use this ckt to charge my tablet samsung tab2. and specification of charger of tablet said it is 5 v 2 amp .........
so do i follow the same LM 323

Yes, for what you want or need a LM323 will work and a Google will bring up the data sheet. You will also need transformer to reduce your mains voltage. You want a transformer with the secondary rated for at least 2 Amps. Secondary voltage should be about 6.3 Volts so a good 6.3 volt filament transformer should work rated at about 3 amps. The below image is about what you want.

The above is a basic linear type supply. There are other designs like SMPS as Alec mentioned. The LM323 data sheet shows a few examples.

Ron