Hi everyone, new to the forums here (well, I've visited a bit, but never registered before!), so please don't execute me if I seem to be hijacking this thread entirely. I'm not trying to!
Just thought this was a better fit than opening a brand-new thread.
I'm looking at building a custom enclosure for an APU-powered HTPC at some point in the future. I'm working with a relatively restrictive budget (not fixed, as this is early planning stages, but the key word is
cheap), which isn't helped by VAT and import fees on anything costing >$40 ordered from outside of Norway. I was looking at doing a PDCB+external brick setup, but the cost of >100W power bricks of any kind of quality put me off that. So I started looking at internal 12V ac-dc PSUs, and came across the Mean Well LRS-150F for a very attractive price. It's from a different series than the open-frame versions discussed here, enclosed (which eases my mind quite a bit!) but well enough perforated to cool easily, but it also lacks PFC (hence the low price, I suppose?). It is the only 12V AC-DC unit I've found for sale in Norway for an acceptable price.
My question is rather simple: can I use this in a PC? Its voltage ripple spec is (rather significantly) outside of ATX spec (150mV p-p), but according to MW's own test report*, actual ripple under full load is only ~28mV - well within spec. Everything else from the report (that I'm able to comprehend, which is definitely the main limitation here - I'm no engineer!) seems great, from hold-up time to rise time, load regulation, protection, inrush current, reliability and efficiency (87.5-88% at 20-100%, 86.5 at 10%).
The PC definitely won't draw 150W, as it'll (most likely) consist of an ITX motherboard, one of the new Raven Ridge APUs, two sticks of RAM an m.2 SSD and a fan or two. I'll probably want to push the integrated graphics a bit for some half-decent gaming performance, but seeing how even the Ryzen 5 2400G is a 65W chip, I doubt the entire thing will draw much more than 100W under full load. I could probably scrape by with a 100W unit, but I like to have a capacity buffer for the sake of reliability.
Am I way off here? Will I burn my house down? Is the lack of PFC a deal breaker?
* had a link to it, but apparently new users can't post links - oh well, it's on their product page for the LRS-150F