Meanwell LED Driver for ITX Fanless Power Supply

[snoopy20]

Hi there,

A new user here, I'm building up an ITX gig. So far I've struggled to find a power supply that is fanless and has good efficiency with active power correction, other than silly priced rebrands. I doubt I need more than 80W total. As meanwell has a good rep I began looking at them and found this one on eBay. I checked it out and it's 91% efficiency.

JOB LOT 5 x LED POWER SUPPLY. MEAN WELL ELG-200-12A 3Y, 12V, 192W | eBay

<p dir="ltr">Joblot 5 x MEAN WELL ELG-200-12A, 3Y, LED POWER SUPPLY, 12V, 192W. <br> Condition is used. Excellent condition. <br> Like new, worked only one day.</p>

www.ebay.co.uk

It also has a small size, a neat design. With a suitable PICO it should work fine right?

Cheers,

Andrew

 

[Curiosity]

the ripple on the PSU is a bit high at 150mv p-p, atx spec is 120mv p-p.
it might be worth a shot though.

a popular solution is meanwell's epp series maybe use the epp-100-12 +pico unit?

there's also a while thread for this kind of thing right here in the forums! (I'll edit with the link)

 

[Curiosity]

Power Supply - A Guide to 12V PSU

Hello. With the recent announcement of G-Unqiue’s entry into the PICO Plug-in Type (which I will now refer to as Plug-in DC Board or PDCB for short), I have decided to revamp this thread into a general guide to Meanwell PSU. As I learn more and build into it, I will add information and update...

smallformfactor.net

jk I'm just going to make a new reply because I'm lazy

 

[snoopy20]

That would only be the 12v line anyhow which I think is used mainly to power the CPU and goes through a further buck on the motherboard. The PICO would lower the ripple further for the 5/3v lines.

EPP-100 looks almost identical for efficency, worth a shot. Looking forward to the link, thanks!

 

[snoopy20]

Oh I think I've had it wrong. I thought the 12v went into the PICO and then into the 24 pin ATX supply, I forgot about the separate 4 pin 12v line. So now I think the 12v goes into the PCB, the PICO goes into the 24 pin where it's picking up the 12V and creating the 5v/3v lines.

So the question is what is using the 12v line for the ripple to be an issue? I assumed it was being bucked to a much lower voltage for the CPU and RAM.

 

[Curiosity]

honestly I'm not 100% sure, the extent of my knowledge is in some model numbers and 120mv atx spec being a thing. you could always try the PSU you linked, high ripple to my knowledge just causes issues with system stability.

you might get more/ better replies from the smarter folks in the 12v thread, though.

 

[snoopy20]

HI,

EPP-100 is discontinued. It's been replaced by EPP-120 - which is tiny and has same efficiency.

MEAN WELL Switching Power Supply, EPP-120S-12, 12V dc, 9.5 A, 11.8 A, 114 (Convection) W, 141.6 (Peak) W, 1 Output, 113 | RS

uk.rs-online.com

 

[smitty2k1]

HI,

EPP-100 is discontinued. It's been replaced by EPP-120 - which is tiny and has same efficiency.

MEAN WELL Switching Power Supply, EPP-120S-12, 12V dc, 9.5 A, 11.8 A, 114 (Convection) W, 141.6 (Peak) W, 1 Output, 113 | RS

uk.rs-online.com

Yeah that EPP-120s looks great if you're just powering an APU. Or running a super low power CPU (35w) + 75w GPU.