Sparkle Power Supply SP1350PFB Good-Bad

[sam_sam_sam]

What do you think will it do 350 watts

[sam_sam_sam]

Re: Sparkle Power Supply SP1350PFB Good-Bad

Here are more photo

I bought these new - old stock surplus so who knows how long they been sitting around on a shelf

I paid $12.00 plus $9.00 shipping each
I bought two of them this one has not been recap yet the other one has been recap with
KY , KZE , LYX this power supply seems to work ok with these caps

[dmill89]

Re: Sparkle Power Supply SP1350PFB Good-Bad

It's an FSP and I don't think I've seen an FSP that won't do its rating (once you replace those bad caps of course), they don't tend to "inflate" their numbers like some do.

[Stefan Payne]

Re: Sparkle Power Supply SP1350PFB Good-Bad

Yeah, it is FSP, something like those HHN thingys, something like FSP Epsilon.
Not the greatest thing, but for a 350 more than enough, but rather +5V havy, sadly...

[sam_sam_sam]

Sparkle Power Supply SP1350PFB I want to modify this power supply

I would like to modify this power supply to put out 18 to 24 volts could this be done and what would I need to do and how

I would not need the 3 volts but would need the 5 volts + and -

[petehall347]

Re: Sparkle Power Supply SP1350PFB I want to modify this power supply

I would like to modify this power supply to put out 18 to 24 volts could this be done and what would I need to do and how

I would not need the 3 volts but would need the 5 volts + and -

you need to change the design a bit ... choose where to take the 18 or 24v from and regulate it .. look at data sheets for intended regulators first .. then work out the current etc ...
why bother ? just buy ready made what you need .

[sam_sam_sam]

Re: Sparkle Power Supply SP1350PFB I want to modify this power supply

why bother ? just buy ready made what you need .

Because I have a few these power supplies and I did not pay much for them and I am looking for a challenge and some thing to work on
I also want to learn something as well

[PeteS in CA]

Re: Sparkle Power Supply SP1350PFB Good-Bad

Sparkle, despite a name that sounds odd to speakers of English (very close to "Spark", not a good association, IYKWIM), is solid. I'd like the heatsink to be a little more substantial, but with really good airflow it could be alright. One of them has caps that have puked their guts; at 6+ years old, that's not horrific.

Trying to change it to an 18V or 24V P/S could be challenging. The +5V winding turns ratio won't allow for that. And I would not be confident that the +12V winding (probably a winding "stacked" on top of the +5V winding, to take advantage of the +5V regulation) has that much capability. IF the +12V winding is capable, the duty cycle will be much greater, making your minimum AC voltage higher. If the output caps are 16V, you'd have to change them to 25V or 35V parts. Similarly, IF the +12V winding might be capable you would have to find the feedback divider resistors and change the ratio, specifically the "upper" resistor. If you can find it, I'd suggest starting with a potentiometer of 5X-10X the resistance you're replacing, adjust to the voltage you want, measure the resistance of the pot, and install the standard value resistor that is closest to that value (or just keep the pot).

I don't even want to think what would happen to the loop compensation or how to adapt it (maybe if there's a cap across the resistor you changed, find a value that keeps the RC time constant the same?)!

You might be able to pull it all off, but I wouldn't bet on it. But it sounds like you're doing this for fun and learning, so have fun. You definitely will learn.

[sam_sam_sam]

Re: Sparkle Power Supply SP1350PFB Good-Bad

Update—> I know that this is a very old post but it is the switching power supply's that I have quite a few of them

Like I said earlier in this post I bought even more of them because they kept having sales on them

I probably have about ten of them and some of them are 300 watt ones

and so far everyone have blowed caps on the output power rails and as far as I can tell these power supply were new never used because they are very clean inside of them

The biggest problem with changing the caps on this board is some of traces are very narrow and lift off the
board and there are two caps next to each other one in particular the one near the primary side of the board it a small UF value

The other problem with this board is that the output caps and the wires and inductor are all packed together in a small area which replacing is a pain in the a** to do

I have recapped another one of them yesterday and ran it all night and seems to run all right