12V to 48V DC-DC Converter

A simple DC to DC converter built using common components. Input is approximately 8-14VDC, output is adjustable between ~21-48+VDC. Efficiency is approximately 73% at full rated load with 48VDC output.

UPDATE: A schematic and pictures of a simple PCB design are here: http://lambertan.no-ip.com/images/Electronics/Work/RBUCK_PSU/

Category:

Science & Technology

Tags:

• DC
• converter
• power
• electronics
• inductor
• flyback
• transistor
• voltage
• volts

[MrSomeone4321]

poor...

[resaebiunne]

@MrSomeone4321 Based on what?

[T0B0KKE]

I doubt you can do anything beyond 10 kHz in a breadboard. You need an actual PCB for frequencies much higher than that. I'm building a forward converter controller with radiation hardening in current-mode control and the switching frequency is 1 MHz. I can't even thing of doing that in a breadboard. Those wires would be antenas rather than conductors...

[resaebiunne]

@T0B0KKE You can do a lot more than 10 kHz. I'm willing to guarantee a good breadboard job can do much better than a poor PCB job any day.

[T0B0KKE]

@resaebiunne 1 MHz?? Impossible. No matter what you do with your breadboard you will have too much noise with the configuration you've shown in your video. Its loops everywhere for god sakes!

[resaebiunne]

@T0B0KKE First off, I never said 1 MHz. Second, loops pickup noise yes, but noise isn't the biggest issue with a breadboard. Noise may be an issue sure, but a larger problem at 1 MHz is going to be the parasitic inductance and capacitance, not noise. This prototype worked just fine, and I think the oscillator was 500 kHz or so... No big deal, really.

[MrSomeone4321]

@resaebiunne based on that I created much better one...converts 5-15V to 260VDC ;)

[GearClinkz]

i think the link is broken. can you fix it plz? im really looking forward to this. thanx in advatage

[Intanius]

MPJA FTW

[Youtubuxian]

Wonderful way to learn about SMPS circuits is to do it with more discrete components. Thanks for the vid! :)

[Youtubuxian]

@antonyr123 No you cannot. Pin (Power In) has to be greater than Pout even just by ~5%. 12*80=960W, Where as 14*80=1120W. You will have conversion losses and at that current even the resistance of the PCB matter. A high estimate for your max power output is 864 watts given 90% efficiency or 61A @ 14v.

Low estimate for a DC-DC converter given 60% Efficiency can be in the 575W output or 41A @ 14v.

It all depends on what converter you use, and how good your design is.

[classclown555]

Very nice work. It's refreshing, for a change, to have the work explained and not become simply another dark, shaky canvas upon which is laid the owners favorite ill-chosen music. Impressive and well thought-out. Thank you for an example of incredible ingenuity and the forethought to present a video that doesn't leave more questions once viewed.

[antonyr123]

can i make a 12v 80amp psu into a 80amp 14v ?

[freefood8890]

how does it handle non-static loads?

[T0B0KKE]

@resaebiunne Crosstalk is noise for me...