Delux ATX-450W extreme upgrade

[Dan81]

Re: Delux ATX-450W extreme upgrade

These generic PSUs are relatively easy to "upgrade". Fit a center tapped EI/ERL core 39 or 44 size main transformer, 15Amp main switchers to experiment with the circuit's limits.

I might just simply replace the main transistors (given my big 13009s work), use some good rectifiers on the secondary and it might just put out a solid 350W? The heatsinks are pretty good.

[pdavid]

Re: Delux ATX-450W extreme upgrade

These generic PSUs are relatively easy to "upgrade". Fit a center tapped EI/ERL core 39 or 44 size main transformer, 15Amp main switchers to experiment with the circuit's limits.

[Dan81]

Re: Delux ATX-450W extreme upgrade

Heh. I just did one exactly like this today.

Some of the stuff I have done for now (it's still WIP) :
ERL-35 transformer from a dead Kaisen
Complete input filter
PI coils
Yate Loon fan (the old one was partially seized)


To be done:
Balance the amperage of each rails for 12v-heavy operation (16A for 3.3 and 5v rails and a BIG load of amps for 12v? 30A for 12v sounds like a good thing. (though 20A isn't bad either)
FULL RECAP (including primary)
13009 transistors (I have a pair of them,gotta test them though - might consider TT2194s as well)
Newer case with 120mm (hope I can get one of those uber-crappy 460W LPK19-30 PSUs) fan - probably going to use a Raidmax LED fan for it.

Connectors: 1x 24 pin ATX detachable,2x SATA,2x Molex,1x Floppy,1x ATX12V P4.

[Th3_uN1Qu3]

Re: Delux ATX-450W extreme upgrade

With that much beef on the secondary, 13007s will suffice for the job.

I have pulled 650W continuous at 40C ambient from a pair of 13009s, with efficiency of ~84% (over 90% at 350W). It's all in the output rectifiers.

[Dan81]

Re: Delux ATX-450W extreme upgrade

No. It actually has working overpower protection, however far-fetched that might sound.

Wonder what happens if you put some 13009s in it.

At least my Deer came with 13009s.

[Th3_uN1Qu3]

Re: Delux ATX-450W extreme upgrade

Did it blow the switching transistors when it shorted?

No. It actually has working overpower protection, however far-fetched that might sound.

[ben7]

Re: Delux ATX-450W extreme upgrade

Good job!

Exactly. I did actually test it like that and one of the MBR2045s failed short after a few hours. They were replaced with one 20100 and one 3060 in parallel. With 50A worth of diodes, this isn't gonna have 12v capacity problems, ever.

I thought something seemed odd there! :P
Did it blow the switching transistors when it shorted?

You certainly gave that a unique touch.

What can I say?

Now, it's a "Super Delux."

LOL You guys are too funny! xD

-Ben

[Khron]

Re: Delux ATX-450W extreme upgrade

For all we know, i reckon they may as well be the same OEM

But then again, who can know how many Chinese factories churn out tons & tons of these cheapos based on that same "archetypal" design?

[everell]

Re: Delux ATX-450W extreme upgrade

Your Delux power supply looks like some I-Micro power supplies I recently worked on. They also required some "unique" improvements. Would you say that Delux and I-Micro are the same in Romania? I have never seen a Delux brand in USA.

[Wester547]

Re: Delux ATX-450W extreme upgrade

As far as I can recall, the different voltage drop characteristics of the two rectifiers can possibly cause thermal runaway (if not that, derate the current capability) since they're in parallel. But with good cooling and heatsinking, you could keep that under control.

[Th3_uN1Qu3]

Re: Delux ATX-450W extreme upgrade

Exactly. I did actually test it like that and one of the MBR2045s failed short after a few hours. They were replaced with one 20100 and one 3060 in parallel. With 50A worth of diodes, this isn't gonna have 12v capacity problems, ever.

[Wester547]

Re: Delux ATX-450W extreme upgrade

The 45V reverse voltage spec is too low for the +12V output of the half bridge topology? Regarding the two MBR2045CTs, I mean. That would be my guess.

[Th3_uN1Qu3]

Re: Delux ATX-450W extreme upgrade

Yes, For the temperature control circuit i just used what was silkscreened on the PCB in the first place. A 1 amp NPN transistor, a thermistor and a resistor.

I did not change or move any minimum load resistors, couldn't be bothered.

Btw, there is one deliberate mistake that i have left in the pictures. Anyone noticed it until now? It has been changed before i put everything back together. Hint: diodes.

[Pentium4]

Re: Delux ATX-450W extreme upgrade

Wow, awesome job! That must have been fun to work on.

the output filter toroid for 5v and 12v was replaced with something more appropriate.

NICE! was the -5V winding the only difference between the two?

With the higher efficiency, you could probably get quite a bit more out of those 13007s and 33 transformer.

Where's the temperature control circuit? What method did you use?

Did you change out that 27Ω(?) resistor on the 5V so it doesn't cook the Seacon cap?

So i declare this one a success.

Yeah I'd say it was definitely a success

[Th3_uN1Qu3]

Re: Delux ATX-450W extreme upgrade

It's the -12v rail which is unused nowadays. Could care less even if it bloats. It's not in a hot spot either so it will be fine.

Friend said he installed it back in his computer today. He told me he thought at first that the fan wasn't running. After a few hours of gaming he says it sped up a bit but the air coming out is just barely warm. This is running the 7850K at 4.4GHz full time, turbo disabled.

So i declare this one a success.

[Majestyk]

Re: Delux ATX-450W extreme upgrade

..., and one of the Asia'x 1000uF 16v caps originally on the 12v rail got moved on the -12v rail...

I would kick this one out of the PSU, Asia´X Caps are made by Fuhiyyu.

[Th3_uN1Qu3]

Re: Delux ATX-450W extreme upgrade

When you say input filter coil, you're talking about that choke, right? What do chokes do exactly? Do they sit between the rectifier and the input caps or before them entirely?

It is called a "common mode choke", it sits in the AC input, before the rectifiers. Both line and neutral pass thru it. You can check out its operation in detail here. File is also attached in case it moves somewhere.

Great job. By the way, junky fans can be made to run very well with a good re-greasing. The only thing that I don't like is when the fan has no rubber plug on the hole, because then the dust gets in.

We had oiled the fan before. I still didn't like how it sounded. I usually use silicone grease, but we didn't have any on hand at that time. Maybe i will try the grease and see if it gets better.

[Dan81]

Re: Delux ATX-450W extreme upgrade

Good job on that Delux!

Might upgrade the rectifiers on my Delux since it's powering a Athlon 64 x2 and it quite gets hot. Mine's a Linkworld inside btw. Also,I installed a Delta fan in the place of the old one.(Ruilian Science)

[kaboom]

Re: Delux ATX-450W extreme upgrade

What can I say?

Now, it's a "Super Delux."

[mockingbird]

Re: Delux ATX-450W extreme upgrade

You certainly gave that a unique touch.

When you say input filter coil, you're talking about that choke, right? What do chokes do exactly? Do they sit between the rectifier and the input caps or before them entirely?

Great job. By the way, junky fans can be made to run very well with a good re-greasing. The only thing that I don't like is when the fan has no rubber plug on the hole, because then the dust gets in.

But if the stickers loses its adhesiveness, I just use some rubber cement I got from the dollar store. It's also good for re-applying rubber feet to routers or modems if they fall off.