Arrow.com Power Supplies

[Noel Richards]

Spent a few hours on Arrow.com last night and got confused with the variety of PS which 1 do people use they say all different amounts of outputs, I'm use to cheap chinese where you have + - E then 2 + - I will be powering a matrix with 2,688 nodes so need around 300w or bigger.

Noel

 

[darylc]

lrs-350-5 or lrs-350-12 are the low end meanwells

 

[Noel Richards]

lrs-350-5 or lrs-350-12 are the low end meanwells

Darylc which would you suggest.

 

[David_AVD]

For the part numbers, the -5 means 5V and the -12 means 12V, so choose the correct voltage for your application.

 

[Noel Richards]

lrs-350-5 or lrs-350-12 are the low end meanwells

What about this 1. https://www.arrow.com/en/products/uhp-750-12/mean-well-enterprises

 

[David_AVD]

That's 750W. You could likely buy multiple 300W ones cheaper.

This is a common 320W one: https://www.arrow.com/en/products/rsp-320-12/mean-well-enterprises

 

[Noel Richards]

OK so when I look at the Mean Wells I see LRS which Daryl says is the cheaper version which 1 do people recommend for us to use.

 

[Cranzy]

OK so when I look at the Mean Wells I see LRS which Daryl says is the cheaper version which 1 do people recommend for us to use.

If you are using 12v pixels -> lrs-350-12
If you are using 5v pixels -> lrs-350-5

 

[Noel Richards]

If you are using 12v pixels -> lrs-350-12
If you are using 5v pixels -> lrs-350-5

They are 12V.

 

[bpratt]

I understand you can order these power supplies from a company called Mouser that has a presence here in Australia.

 

[David_AVD]

Mouser is USA based. They do sell via X-ON but it's usually cheaper to buy from Mouser if your order more than AUD $60 worth. Arrow had free freight as a promotion recently, but not sure if it still current.

 

[bpratt]

$60 worth? .... that's just a couple of power supplies..... not a problem.

 

[bpratt]

here's a post from diychristmas site from a few years back.... make of it what you will.

"The RSP-320-12 is an Active PFC power supply, where the LRS is Non-PFC.

In every other way, the LRS is as good or better as the RSP.

Mainly PFC is needed for meeting regulatory demands since it reduces harmonics to the power company. (i.e. High peaks and crests). For example the LRS would be illegal in Europe, but it's still legal in the U.S.

It won't really reduce your electrical bill or anything.

So the LRS is probably good enough... EXCEPT that I'm going to change my own power supplies to PFC ones next year. I have 12 active running 60 A power supplies and they are creating havoc with each other and my GFCI outlets, so I have to change them anyway. I don't know if PFC will really help that much with the inter-power-supply interference, but I don't want to have to change them yet again."

and another post.

"Inrush current might (or might not) matter to you:

LRS-350-12: 60A
RSP-320-12: 20A
"

 

[David_AVD]

Personally I would always use an RSP series over the LRS series. Even at work we use the RSP series.

 

[Dez]

Spent a few hours on Arrow.com last night and got confused with the variety of PS which 1 do people use they say all different amounts of outputs, I'm use to cheap chinese where you have + - E then 2 + - I will be powering a matrix with 2,688 nodes so need around 300w or bigger.

Noel

I assume these are much better quality than the Chinese ones? Have you had issues with the Chinese ones?