smps modification

[m15981]

Hi there

I am working on a project which requires two voltage inputs from an smps. Because my time is limited i don't have enough time to design and implement my own smps so i have decided to go with an open frame ready made one. The one i am planning to use is 5V, 8A output. Because i need two inputs to my circuit i want to modify the smps to output 5V at 1-2A and 3.15V with the rest of the current. Any ideas on how this can be done? Thank you

[mvs sarma]

Hi there

I am working on a project which requires two voltage inputs from an smps. Because my time is limited i don't have enough time to design and implement my own smps so i have decided to go with an open frame ready made one. The one i am planning to use is 5V, 8A output. Because i need two inputs to my circuit i want to modify the smps to output 5V at 1-2A and 3.15V with the rest of the current. Any ideas on how this can be done? Thank you

Hi,

Perhaps explanation insufficient-- needs elaboration  and a sketch , even to start thinking on it, please

[indulis]

ou could use a buck converter. Limiting the current for the 5V @ 1-2A could be an issue if you can't live with a fuse.

[Fowkc]

You might want to look at the "5v to 3.3v" thread near this one. Basically deals with the same problem, but you'll need to account for the increased current your converter will be carrying.