Diablotek Power Supplies

[everell]

This thread is to compare Diablotek power supplies.

First up is a Diablotek PSDA600, a 600 watt in the DA series featuring dual transistor forward topology. Features are:
Line filter with X and Y capacitors
Bridge diode (marking against heat sink)
Main capacitors LCZ 1200 uF/250 volts
Switchers two SS20N50F FETs
Switching transformer ERL-3906 (YE1135)
Output diodes, 12 volt rail two MBR30100CT, 5volt and 3.3 volt rails could not read
3.3 volt circuit has a mag amp
Output filters:
12 volt two BH 2200 uF/16 volt capacitors and coil
5 volt two GL 2200 uF/10 volt capacitors and coil
3.3 volt two GL 2200 uF/10 volt capacitors and coil
PWM chip is UC3843A, driver transformer EE1000
5vsb PWM chip is LN9115B
5vsb output pi filter is input GL1000 uF/10 volt, output GL 470 uf/16 volt, and coil
5vsb transformer EEL1992 YE
Supervisory chip WT751002S
Two fans connected directly to +12 volts
Output cable harness uses 18 awg wire
PC Board ID: GT-ATX M ver 1.6

Anyone want to guess the OEM?

[everell]

Re: Diablotek Power Supplies

Next up is Diablotek PSDA400, also from the DA series. This one is a 400 watt half bridge. Its features:
No line input filter
Bridge diode KBL406
Main Capacitors Canicon 470 uF/200 volt
Switching transistors D1035 (TO220)
Switching transformer EI-33
Output diodes:
12 volt MBR20100CT
5 volt SB2045CT
3.3 volt SB2045CT
3.3 volt circuit has mag amp
Output filters none have pi coils/pi filters
12 volt two Canicon 1500 uF/16 volt (in parallel)
5 volt Canicon 1500 uF/10 volt
3.3 volt Canicon 1500 uF/10 volt
-12 volt Canicon 470 uF/16 volt
PWM chip is SDC2921 driving two STC945 transistors
Driver transformer EE-16 with 2.2 uF/50 volt AsiaX input capacitors
5vsb two transistor circuit with D3866 and STC945 transistors
5vsb transformer EE-19
5vsb output pi filter with two Canicon 470 uF/16 volt capacitors and coil
Two fans connected directly to +12 volt rail
Output cable harness uses 22 awg wire - looks like thin spheghetti!
PC Board ID: S-ATX1006A

Anyone want to guess the OEM?

[everell]

Re: Diablotek Power Supplies

Both Diablotek power supplies, PSDA600 and PSDA400 were tested with no load, and both powered up OK. To test them under load, I decided to use a Compaq mother board from turn of the century, a Deskpro with Pentium 3 733 Mhz and 815 chipset. The OEM power supply originally with this mother board was a 200 watt PDP100 series.

The 400 watt Diablotek refused to turn on. The 600 watt Diablotek came up running just fine. Ran it for over an hour, then shut the computer down.

I think the two power supplies were built by two different manufacturers. The 600 watt unit looked well built. The 400 watt unit should be classified as POS. As a 400 watt power supply, it could not power up what the original 200 watt power supply could handle. Makes me wonder how much power this "400 watt" power supply puts out.

[goodpsusearch]

Re: Diablotek Power Supplies

Look at the heatsink thickness of the second psu! What a POS!

[c_hegge]

Re: Diablotek Power Supplies

That first one looks a lot like my Cooler Power GX850. It even looks to have similarly rated switching transistors. It won't quite do 600W, but 450 or even 500W should be fine.

EDIT: I probably should ad that the OEM of that first one is Golden Tiger.

[kaboom]

Re: Diablotek Power Supplies

next up is diablotek psda400, also from the da series
***
anyone want to guess the oem?

First guess would be ATNG, but with the Canicons (you can't) and Asia-Xs, I'll gladly throw Deer under the bus...

It seems that this is the "high end" model- there are two holes in the board if you didn't want the "optional" fuse (and thermistor). The super deluxe would have all the filtering components.

It can't be Linkworld- no way. Not this bad...

[momaka]

Re: Diablotek Power Supplies

Both Diablotek power supplies, PSDA600 and PSDA400 were tested with no load, and both powered up OK. To test them under load, I decided to use a Compaq mother board from turn of the century, a Deskpro with Pentium 3 733 Mhz and 815 chipset. The OEM power supply originally with this mother board was a 200 watt PDP100 series.

The 400 watt Diablotek refused to turn on.

Interesting.
If you have a PC with a 12V 4-pin CPU plug (i.e. Pentium 4 and newer), try that. Maybe they (whoever manufactured the PSDA400) added a few extra turns on the main transformer for the 12V rail to keep it a bit higher under load. So perhaps the 12V rail is going a tad bit too high with that Pentium 3 PC (which draws power for CPU from 5V rail) and making the PSU shut down?

Or perhaps some of those BH and GL output caps have gone bad without showing it. I am guessing you didn't buy this PSU brand new, so there's a good change the output caps could be bad.

Look at the heatsink thickness of the second psu! What a POS!

Yes, they are quite bad indeed. But definitely not the worst. IMO, the really thin "T" heatsinks with small holes on top have to be the worst. Sometimes I wonder why the PSU manufacturers even bother with them. Might as well let the parts run free air

First guess would be ATNG, but with the Canicons (you can't) and Asia-Xs, I'll gladly throw Deer under the bus...

Ain't no Deer I've seen before. Not Linkworld or ATNG either. Keymouse, maybe? I am taking a complete wild guess here though.

Meh, let's just call it Hong Kong Fly Apart LLC.

[everell]

Re: Diablotek Power Supplies

Ain't no Deer I've seen before. Not Linkworld or ATNG either. Keymouse, maybe? I am taking a complete wild guess here though.

Meh, let's just call it Hong Kong Fly Apart LLC.

Like this picture!

[shovenose]

Re: Diablotek Power Supplies

Like this picture!

dat font - it's perfect!

[Pentium4]

Re: Diablotek Power Supplies

I have the first one you posted. Good unit! With those LCZ caps, there is no way they're both 1200uF and 250V. They're either 1200uF 200V, or something like 820uF 250V

[everell]

Re: Diablotek Power Supplies

Thanksgiving Day 2016 and the devil has not gone away. Just given a Diablotek 500 watt power supply. Quality seems to be between the two posted earlier in this thread. Full of dirt and dust balls (perhaps like the devil himself!). Half bridge, 320 volts DC comes up OK and the 5vsb comes up OK. Other than that, this devil is dead. PWM chip is EST 7502. I can get signals on the two outputs, but the signals coming out of the two driver transistors is almost nothing. First thing I will try is replacing those two transistors. Here are some pictures for comparison with the other two devils.

Happy Thanksgiving to all.

[momaka]

Re: Diablotek Power Supplies

Wait! Do I see?... PI coils on the outputs?!
Doesn't look too terrible. Crappy cap choices aside, it actually seems okay for 200-250 Watts.

[fzabkar]

Re: Diablotek Power Supplies

so perhaps the 12v rail is going a tad bit too high with that pentium 3 pc (which draws power for cpu from 5v rail) and making the psu shut down?

+1

[Dan81]

Re: Diablotek Power Supplies

Wait! Do I see?... PI coils on the outputs?!
Doesn't look too terrible. Crappy cap choices aside, it actually seems okay for 200-250 Watts.

I'd actually say more than that,as the transformer is ERL-39. Also,notice that it's bigger than EI-33.

[Sparkey55]

Re: Diablotek Power Supplies

I'd actually say more than that,as the transformer is ERL-39. Also,notice that it's bigger than EI-33.

I would say about 350W with some air blowing across those heatsinks.

[Dan81]

Re: Diablotek Power Supplies

I would say about 350W with some air blowing across those heatsinks.

More like 400W if moved to 12cm fan PSU casing and primaries replaced with Nichicon/Rubycon/Panasonic 1200uF caps.

[Sparkey55]

Re: Diablotek Power Supplies

At 400W i think you might get at about a 70% duty cycle. The fan would need to be pushing some serious air flow. And the ripple might be out of spec.

[Sparkey55]

Re: Diablotek Power Supplies

That 500W label may be a peak rating in which case I would not push it for more than 360 to 420W for a long time.

[goodpsusearch]

Re: Diablotek Power Supplies

i would say about 350w with some air blowing across those heatsinks.

+1

More like 400W if moved to 12cm fan PSU casing and primaries replaced with Nichicon/Rubycon/Panasonic 1200uF caps.

Primary transistors? If they are 13009 it will blow at 400W or earlier.

[Dan81]

Re: Diablotek Power Supplies

+1



Primary transistors? If they are 13009 it will blow at 400W or earlier.

Maybe not if they're in TO-3P package,but I may be wrong.