Hello everybody
I am designing power supply circuits having outputs isolated input has the following characteristics
Input: 24V DC
Output 1: + 12Vdc
Output 2: -12Vdc
I need a schematic principle, everyone please help me
thank all

 

Why do they need to be isolated?
If they truly need to be isolated from the 24Vdc input, then you will need to use a switch-mode power supply with transformer isolation between primary and secondary.
How much current?

 

Why do they need to be isolated?
If they truly need to be isolated from the 24Vdc input, then you will need to use a switch-mode power supply with transformer isolation between primary and secondary.
How much current?

I need isolation for safety. current for each output is 1A

 

I need isolation for safety.

Is there a large voltage difference between the commons of the input and outputs?

 

While Pioneer and others make off-the-shelf switching power supply transformers, the odds of finding one for your voltages and power level are very low. than means designing and building a 30 W high frequency switching power supply transformer from scratch. This is not a simple task, and is in fact usually handled by experienced designers. Switching magnetics are not easy.

Also, since you brought up safety, does the power supply have to meet any safety agency performance parameters (UL, CSA, TUV, etc.)? If so, the transformer just got harder. I'm not trying to be negative, but 30 W is not a simple little project in this area.

ak

 

but i need a schematic.
how to stablize voltages of two outputs

 

but i need a schematic.
how to stablize voltages of two outputs

Based on my limited experience:

Truly isolated outputs demand individual secondaries asigned to each one ( like having one transformer for each one)

Regulating each output is a separate problem in itself, otherwise they would be not truly isolated.

 

but i need a schematic.
how to stabilize voltages of two outputs

Thee re thousands of power supply designs to choose from. Why don't you show us what you have worked up so far, and we'll start with that?

ak

 

my project is show bellow

I designed it according to type of flyback power.
Stabilizers output is -12V, + 12V output but not stable, while both have equal secondary coils. Who can help me solve this problem, thank all alot