ATX PSU replacing 10v with 6.3v and 3300uf with 2200uf

[gonzo0815]

Hi,

i ned recaping an Enermax 365w PSu, Seasonic ss400FSand may be an fortron 350w (there are some Jamikon, but loking fine and i think they aren`t bad).

The Enermax uses one 3300uF 16v. Now i only obtain some 2200uF 16v Panasonic FC or 2200uF 16V UCC KZG.
Same is with the 3300uF /10v. i only could obtain some Rubycon KCZ 2200uF /6,3v.
It is safe to use those 2200uF (there are J tur or Ptur caps, seems not blown yet, doing this only for future reliability and perfomance.) ones?

Same is with the seasonic ss400fs, there are leakin 3300 10V caps (ptur) on it. I want replace them with rubycon MCZ 2200uF/6.3v. ( the k7s5a is probably tho heavy for that caps).

The ESR values are always better than of the used crapy caps on those PSU`S, but i lose some bulk capazitance, which i am not sure if that will impact the performance of an PSU. on 12v i think that isn`t that important, but 3,3 and 5v i am not sure, especially as those psus power some 3,3v and 5v hungry sockel A boards.


An other thing wich i am locking for, ist hte generall ripple current, which is produced by an given current on an ATX PSu.

[Chris1992]

Re: ATX PSU replacing 10v with 6.3v and 3300uf with 2200uf

I'd not reduce capacitance on a PSU, because that could result in bad voltage filtering.

[yanz]

Re: ATX PSU replacing 10v with 6.3v and 3300uf with 2200uf

usually i found 1500 to 2200uF in some low to mid quality PSU. Then 3300uF and up in the high quality PSU . I think going from 3300 to 2200 isn't that bad if you put new high quality caps, but ofcourse decrease the filtering capacitiy a litle bit.

I was curious also of lowering rate voltage from 10V to 6.3V. Measuring with DMM proof that <5V rail never rise beyond 6V.

[Rainbow]

Re: ATX PSU replacing 10v with 6.3v and 3300uf with 2200uf

Can you get 4700uF?

[yanz]

Re: ATX PSU replacing 10v with 6.3v and 3300uf with 2200uf

I was asking the same question in teh PSU section:
https://www.badcaps.net/forum/showth...newpost&t=1434

Probably it will be just fine...

[gonzo0815]

Re: ATX PSU replacing 10v with 6.3v and 3300uf with 2200uf

ok thx for al the answers. At the moment the only suitable 16v caps are 2200uF KZE or FC. For the 6.5v i think i order may be some bigger ones, but i could only obtain them in larger diameter, and in al that psu unit`s there are no place for them...relay stupid desing in my opinion.....
may be i can solder some more caps to the output wires , there may be are enough space, for filtering and transient response this should be ok, even if they are not as close as possible to the psu board.
But again, dopes anyone know how mutch riple current those caps need to sustain for an given outputcurrent?
For two phase VRM units i figured it would be a about a quarter of the outputcurrent, but if that applies to psu units the usuall caps would be all insuffizient.

Wich brand would be better, the ucc KZE or the Panasonic FC?
Considering that the FC ones are sigificantly more expensive?Are they even better than the ucc?

[PeteS in CA]

Re: ATX PSU replacing 10v with 6.3v and 3300uf with 2200uf

Go with the KZE: lower Z; higher ripple current rating; same rated life; lower cost.