Switching power supply

Status
Not open for further replies.
C

clros

Member level 2
Joined
May 26, 2018
Messages
45
Helped
0
Reputation
0
Reaction score
0
Trophy points
6
Activity points
387
I would like to design a switching power supply that provides different voltages for a circuit I designed.
I need a double voltage (+/- 3v) and two other voltages (+ 5v, +12v).

I have no experience with the design of such power supplies and I ask you:
1) Are there any guidelines?
2) I don't think a transformer exists with all the tensions that I need, can I build it myself?
3) Is it convenient to build it?
 

what is your vin?
What are the powers of those rails?

Kashke (kaschke?) , i think its German, do offtheshelf flyback trasnsformers, possibly for your application.

If your power source is mains , why not download the "PI Expert " software from power integrations and stuff in your spec...it will design the whole thing for you.
 
Reactions: clros

    C

    clros

    Points: 2
    Helpful Answer Positive Rating
If you want all of those voltages from a single switch
and single core you will see cross-regulation as an issue
(one winner, N "also-rans").

If you are in it for amusement / education, then you
can go ahead and play. If you are really looking to
get a power solution for some other care-about, then
I'd recommend maybe confine your design effort to
the "distribution bus converter" (say, the battery to
regulated 12V) and then hang +5, +3, -3V DC-DC
modules off the distribution bus (easy enough to find
12V in, "whatever" out, tiny DC-DC modules - even
ones that look like 7805 (with a chubbier case, but
the same low-external-component-count)).

That way you get to stick a toe in the ocean without
losing a foot.
 
Reactions: clros

    C

    clros

    Points: 2
    Helpful Answer Positive Rating
treez said:
what is your vin?
What are the powers of those rails?
Click to expand...
I would like to use directly the voltage (220V / 110V) if possible


treez said:
If your power source is mains , why not download the "PI Expert " software from power integrations and stuff in your spec...it will design the whole thing for you.
Click to expand...

I should try it. Where can I find it?
 

You can customize the battery so you don't have to bother yourself so much
 

Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…