smoothing caps : noobity

[Hondacity]

i know most power supplies have em already....

im not sure about the antec..it added 2200uF on the cables....do you think the tpq 1200 have smoothing caps also inside?

i ask this ...coz if i wanted to add a 2200uF on my psu ....which might be a bad idea...it might even cause bad ripple...bigger capacitance=longer discharge? this i think is a bad idea..maybe replacing the load caps is better than adding caps..not sure though...

i don't remember but........ some of you added? or replaced some caps with low esr caps..and i remember increasing the ripples as well? can someone link me there?

for our applications(pc) are smoothing caps generally 1000uF-2200uF 16v(for the 12v ? or is this rule generally for current drivers for sound amplifier powersupplies? ..i know there is a formula and i can't quite remember....

[370forlife]

i ask this ...coz if i wanted to add a 2200uF on my psu ....which might be a bad idea...it might even cause bad ripple...bigger capacitance=longer discharge? this i think is a bad idea..maybe replacing the load caps is better than adding caps..not sure though...

Thats just antec's marketing. They do have caps inside their units, just not enough. Their unit had a problem with ripple, so they added caps on the connectors vs. having to add them into the unit (cost) as well as allowing a play on marketing by claiming they are a "cache". Adding more caps would cause less ripple, the problem with the CWT Antec and FSP that Okla changed the caps on was that the PI filters were not designed for caps that are lower ESR that the old ones.

My concern that a 'radical' departure from the original ESR is throwing the filters out of 'tune' [as it were] with the inductor.
Particularly on PI filters when you change the ESR on one cap a lot more than the other.
- Lets say on a full PI filter you drastically lower the ESR on the final out cap but leave the other cap and inductor ratings alone. - I've just encouraged more ripple to pass through the inductor to be shunted to ground by the cap with the drastically lowered ESR. On that side of the inductor the ripple can be felt by the load. [a.k.a. mobo].
[Recall the jonnyguru recap article were Ripple got worse with better caps installed, I think that's what happened there.]


for our applications(pc) are smoothing caps generally 1000uF-2200uF 16v(for the 12v ? or is this rule generally for current drivers for sound amplifier powersupplies? ..i know there is a formula and i can't quite remember....

Depends on the wattage and the manufacturer. Best way is to look inside. Generally, a good quality 300w-500w power supply will use 2 3300uf, 16v or 2 4700uf, 16v caps for the 12v. Same for the 5v and 3.3v, but with 10v caps. High wattage psu's will use upwards of 4 or 5 3300uf or 4700uf caps for the 12v rail.

[Hondacity]

good info there..thanks

ummmmm in your last paragraph you mentioned some cap ratings...thanks..but can i just add them to my eps12 connector? or do i have to get the right capacitance before adding some...

i plan on getting an eps12 extender and try adding caps on the extender and not modding the original cable...

i saw some guys putting some japanese caps on some videocards....

got tips where i can get a hold of uber best capacitors :D

[ipo3nk]

what about smaller caps? old ocz / topower (i forgot) added 100uF plus 100nf(ceramic) at the end of the connector.

[370forlife]

good info there..thanks

ummmmm in your last paragraph you mentioned some cap ratings...thanks..but can i just add them to my eps12 connector? or do i have to get the right capacitance before adding some...

i plan on getting an eps12 extender and try adding caps on the extender and not modding the original cable...

i saw some guys putting some japanese caps on some videocards....

got tips where i can get a hold of uber best capacitors :D

Really depends, if your unit has a known problem with ripple you can. If not I would not worry about it.

First, you need to know the brand and series of caps currently in your psu. Then, find a data sheet on them and find out the ESR. Then, you will need to find a matching series from the same manufacturer (if they are known good) or a comparable series from another.

I generally use nichicon PW series, they are not Ultra low esr, but still low ESR. Perfect for a power supply. (Getting caps really depends on what country you are in too)

http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=493-1798-ND

Something like that. But still, need to know the manufacturer and series of the caps in your psu now so we could better match them.

The only manufacturer's you should use are rubycon, United/Nippon Chemi-con, Nichicon, Panasonic (Matsushita), Sanyo, and Samxon.

[Oklahoma Wolf]

do you think the tpq 1200 have smoothing caps also inside?

My sources say these questions are due to be answered soon. And by "sources," I mean "imaginary friends." And by "soon," I mean "Sunday." :D

[Hondacity]

My sources say these questions are due to be answered soon. And by "sources," I mean "imaginary friends." And by "soon," I mean "Sunday." :D


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antec delivered :D