Hello, I am interested in a power supply that needs to met the following

1. To NOT oscillate
2. To have maximum output current 5A
3. To have output voltage range 3-25Vdc
4. To have current limit
5. To be tested.
6. To be simple schematic.

I am waiting for your help.

 

Hello, I am interested in a power supply that needs to met the following

1. To NOT oscillate
2. To have maximum output current 5A
3. To have output voltage range 3-25Vdc
4. To have current limit
5. To be tested.
6. To be simple schematic.

I am waiting for your help.

What source of power are you starting with?

And what do you mean, to not oscillate? Are you saying you don't want an SMPS? Can we assume you want the current limit to be adjustable?

The more details you tell us upfront, the better responses you will get.

 

I want an linear power supply, not a smps. By oscillations I mean that I do not want high frequency oscillations in the power supply. The current limit needs to be fixed at a certain value and not adjustable.
I am using a 30-33vac 50Hz transformer for this power supply. I want to build more versions the biggest will have a max current of about 7-8A.

 

Look up the data sheet for the LM317 regulator. It should show a circuit suitable for what you want.

 

Hello,

If you are looking for a linear regulator, have a look at the LT1083.

Bertus

 

I want an linear power supply, not a smps. By oscillations I mean that I do not want high frequency oscillations in the power supply. The current limit needs to be fixed at a certain value and not adjustable.
I am using a 30-33vac 50Hz transformer for this power supply. I want to build more versions the biggest will have a max current of about 7-8A.

Get on ebay or banggood and search for a ready made pcb like this...

https://www.ebay.co.uk/itm/lt1083-p...272186513908?_trksid=p2385738.m4383.l4275.c10

 

I want an linear power supply, not a smps. By oscillations I mean that I do not want high frequency oscillations in the power supply. The current limit needs to be fixed at a certain value and not adjustable.
I am using a 30-33vac 50Hz transformer for this power supply. I want to build more versions the biggest will have a max current of about 7-8A.

You need a transformer with a minimum power of 150W. Better more.

 

You need a transformer with a minimum power of 150W. Better more.

Much more.
Due to the high peak RMS currents generated by a rectifier-capacitor supply the transformer needs to be rated at least 60% larger than the DC output current would suggest.
Thus for 5Adc out from a 33Vac transformer, it should be rated for a least 275VA.
A 150VA transformer will seriously overheat with a 5Adc output.

Edit: Below is an LTspice simulation to illustrate this.
Notice the high peak transformer current, I(V1).
The average output current is about 5Adc, but the transformer RMS current is 8.125A (60% increase from the DC average to the RMS).