Hi Dear,

I am not a power engineer. I have to design an isolation circuit for DC 24V and 3A.
Can please some one give me some suggestion or idea to how to do this?

Regards

 

hi 83,
Welcome to AAC.
Is the DC power supply going to mains powered, if so you will will require mains to 28Vac transfomer and bridge rectifier.
How is the 24Vdc 3A going to be used.?
E

 

Hi,
Thank you. The 24V is going to DC-DC buck converters to generate 5V and 3.3V. I actually have to separate the ground of these supplies.

 

hi 83,
You could go from mains via a transformer that is rated for 9Vac out.
Use a 5V and a 3.3V regulator.
E

 

Hi,
Thanks. I know this but the problem is that I can not change the main source of the supply which is DC.

 

Murata DWR-5/2.65-3.3/3-D24-C ?

 

First give us the input and output voltage.

Second you can use an AC transformer of DC pulse transformer. What you are looking for is galvanic division, which may be achieved even by an opto coupler if we have the circuit.

 

You want two mutually isolated DC supplies?
Buy two isolated DC-DC converters designed to operate from 24V DC
Or do you have the buck converters already and need to feed them with isolated 24V.
Then buy a 24V-24V isolated DC-DC converter
eg https://www.meanwell-web.com/en-gb/dc-dc-enclosed-converter-input-19-36vdc-output-sd--100b--24

To all members: If your application is so sensitive that you need to be absurdly cryptic about it- don't bring it to this forum!