Power supply 5V and 3,8V with max 2A

[pasicr]

schematic power supply 5v

Hi for all on eda forum,
I need schematic for DC power supply 5V and 3,8V with 2A,
any good info,
regards

 

[IanP]

You can do this:
Take ≈230V/8V transformer rated for ≈25VA, use rectifier bridge and smoothing capacitor ≈2200µF ..
Then use 2 step-down switching voltage regulators: one for 5V one for 3.8V ..
A good candidate for this job could be the LM2576, and in its data sheet you will find all info on how to use it ..
**broken link removed**

Regards,
IanP

 

[saurav_sdpl]

I think for 2A current rating its better to go for SMPS, rather than linear power supply.

Transformer size will get drastically reduced.

 

[cameo_2007]

thats what IanP said,2576 is a switching regulator.
and a perfect choice.

 

[un-2000]

read the TOP232 and similar search google top232 and download the data sheets, the examples is very easy and multiple circuits for desing an power transformer feriite material