Hello engineers,

I'm building a custom PCB with powersupply for the rapsberry PI 5.
The powersupply gets it's power from boat batteries 12V or 24V and needs to output a stable 5A for the Rapsberry PI 5 through a usb-c connection.
Can someone help me simulate my circuit, I don't know how to?


Greets,

Rens

 

Go buy a buck DC-DC converter.

 

This buck (also boost) converter from AliExpress will do 8A:

 

Certainly designing a GOOD Five Volt switcher supply is a challenge. That includes even using the design guides provided by the good semiconductor companies that have an established reputation for quality and getting things right. .
You can buy a DC to DC 5 volt module from a distributor with an excellent reputation, and will not sell you junk, for a bit more that what you will pay for unknown quality with no documentation and no good reputation .
That is my personal prejudice about anonymous online sellers. I avoid them.

 

"Hey Rens, your project sounds exciting! If you're new to circuit simulation, you might want to try LTspice or EasyEDA—both are beginner-friendly and great for testing power circuits. Since you're working with 12V/24V boat batteries, a high-quality buck converter with proper filtering will be crucial to avoid voltage spikes.


Also, like MisterBill2 mentioned, going for a reliable distributor might save you headaches down the road. Have you considered using a TI or Mean Well module? They have solid efficiency and protection features. Let me know if you need help setting up a sim!"

Hey Mike,

Yes I have thought about that, but for the moment I couldn't find a good 5V/5A module from TI or Mean Well that i could intergrate in my PCB design. Do you have any available options?

Greets,

Rens

 

Back to the first post, I am suspecting a bit of an error:" needs to output a stable 5A for the Rapsberry PI 5 through a usb-c ". That seems like a lot of current for a small processor. Should that be 5 VOLTS??? For that possibly a power tab LINEAR regulator, with a filter capacitor. And probably a series dropping resistor to reduce the regulator heating, which will definitely need both a large and small capacitors. Not as efficient but much simpler.

 

Hello engineers,

I'm building a custom PCB with powersupply for the rapsberry PI 5.
The powersupply gets it's power from boat batteries 12V or 24V and needs to output a stable 5A for the Rapsberry PI 5 through a usb-c connection.
Can someone help me simulate my circuit, I don't know how to?
View attachment 344857

Greets,

Rens

Is it common to need 5 amperes for the Raspberry Pi?

 

Is it common to need 5 amperes for the Raspberry Pi?

That's the recommendation for the Raspberry Pi 5.
https://www.raspberrypi.com/products/raspberry-pi-5/

 

Also, like MisterBill2 mentioned, going for a reliable distributor might save you headaches down the road. Have you considered using a TI or Mean Well module? They have solid efficiency and protection features. Let me know if you need help setting up a sim!"

Hey Mike, got the powersupply rebuild with better reliable components, check this one down below:


What do you think?

Greets,

Rens

 

It would be a good idea to duplicate the Output-Filter-Circuit,
after the Feedback-Voltage-Divider-Resistors,
to provide substantially more Noise-Attenuation.
.
.
.