Designing a multiple output voltage switched power supply

[ahmedragia21]

I have been away from electronics design for 4 years, and I was just doing software development. I would like to design a power supply that is switched, and with input voltage ranging from 9vdc to 30vdc, and output voltages of 12dc(0.3A), 5dc(1.2A), 3.3dc(5A). I would like to know what are the options especially I would like to have most components to be Surface mounted and don't need large transformers and coils..etc.

 

[ronv]

web bench

If you google web bench it will take you to TI's web bench. I plugged in your values and it came back with 2 buck IC's and 1 buck boost. $5.


https://www.ti.com/ww/en/analog/webench/index.shtml?DCMP=sva_webench&HQS=webench

Give it a try and see what you think.

 

[ahmedragia21]

Thanks

 

[MrAl]

Hi,

My personal preference is if this is not a commercial design i like to use individual regulators for each output. That's the best way. Not the cheapest.

 

[ahmedragia21]

It is a commercial design, so how do you like to suggest for that ?