S Skyee XDUH-331A - hub with built-in USB 3.0 hub with an external power supply and audio connectors

USB 3.0 three port hub on Genesys Logic GL3520. Plus lengthen the headphone and microphone, everything connects to the back panel. A special feature is a form factor, for embedding instead of the standard ⌀60 plug in office desks, with the place for passing the wires left. I think at home this is also useful to me. (I don’t have a USB 3.0 hub in the monitor.) Dismemberment, operability check, current-voltage characteristics with and without external power supply, thought about easy tuning.

Shipping and PackagingDate 16 December 2018, received 25 December. Full track
Transport packaging - gray PE package. But the product is strong, delivery suffered stoically.
Minimum commercial packaging - PE bag with zipper.
Specification3 port USB 3.0 hub
Model: XDUH-331A
Black colour
Material: Plastic
Dimensions: 69 × 24 × 60

Power plug: Euro plug
Power supply: 100V-240V
Whence, they say, and that it is a computer - it is a lot of wires. Tables, specially sharpened under the computers, are often equipped with plugs for cables, about that kind of

There are several landing diameterscommon - 60 mm. The observable hub is built in and intended to be installed in such an opening. Although no one bothers to cut into his own table. (Well, except for the wife). In this case, the main functionality of the plug, the ability to partially hide the wires is preserved. Connection is made to the ports on the rear panel. Just in the computer under the table there are free ones. Plus for USB 3.0, the minimum wire length is critical. If the consumer is on the table, such as an external drive, then the used version is shorter than the USB connection on the front panel. And our hub with external power supply (although, of course, it works without it) and a complete power supply unit of modest size and characteristics. (Let's deal with food separately). According to the seller, can charge smartphones, etc. Check.
What are the variations? Our hub model XDUH-331A - 3 USB 3.0 ports and audio, E in the picture below. In addition to him there is, including the same seller, very similar
3 USB 2.0 ports and audio (B)
4 USB 3.0 ports (C)
3 USB 3.0 ports and card reader (D)
4 USB 3.0 ports and audio, but much larger. Bore diameter 78 mm, and outer diameter 90 mm (A)

From this variety IMHO (A) is no longer due totoo large custom size, B - because of the old slow interface. There is a choice between 3 positions - 3 USB ports, plus what to them? 4th port, audio or card reader? I would take a card reader. But experience tells me that in such hubs it is USB 2.0. I'd rather stick a fast external if necessary. But the audio to me personally, although it does not seem important, but attracts me more than another USB port. Although, everyone has their own priorities, choose.
AppearanceThe hub cabinet has a hole for the passage of other wires

Naturally, like the original stub, the original opening should open. The case has two pairs of snaps. This one holds the outer case in the table.

But this one holds the inner case in the outer

Here is the inner case removed from the outside. External during installation remains in the tabletop, through the holes pushes plug connectors

The length of the wires excluding connectors 770 mm for sound and USB and 50 mm for power. The loose tourniquet fastened with rubber rings in two places


Still included power supply


Diameter of the plug is 3.5 mm. This is a common connector, I found with USB on the other end - extra power for some external HDD. That is, it will be possible to compare a regular power supply with a more powerful one.
NB of this wire included NO


Response nest on the tail of the hub

Inner worldThe bottom side of the board is filled with fluxwith generosity worthy of better use. Microcircuit - flash memory, see below. Capacitors and resistors square - piping the main chip. On the left you can see the unwelded 4th USB port and, just to the right, the daughter card of the audio output.

If you tear off this white striped, maybe Kondraty is enough

Here is an ugly variation on Laocoon and sons there was no fault of the collector. This designer was not smart enough to understand that 100500 wires to one site are difficult to solder. At the same time, to the left of the space for additional platforms - as on rails.
The front side is the main chip, connectors, quartz,coil and not recognized by me chip. Blue LED. By the way, it becomes clear what happened to port 4, because the chip provides. He simply did not have enough space in the tightly bounded space of the hub. Theoretically, you can solder, almost such a collective farm did not give up to anyone.


Daughter card audio connectors. You can also see that the electrolyte is 16 volts, which is pleasant for a 5V device.

Chips are larger than Genesys Logic GL3520 - The most common USB 3.0 hub. Interestingly, the specs he is able to give up to 1.5A, Wed.
GL3520 also complies with USB-IF battery chargingrev1.2 specification, which can support up to 1.5A from the GL3520 charging downstream ports (CDP) or dedicated charging port (DCP). Handheld devices even during “Sleep” and “Power-off” modes.
pm25l0512 - 512 Kbit flash memory. I suppose that is the firmware for the GL3520.

G64v2 I did not recognize

In the role of hubTL; DR No surprises - does not ask for firewood, does not cut speed
I connect to the computer - W7 sees the appearance of a pair of standard hubs, the driver does not ask


I have an antique computer so there is no sense to expect very high absolute speeds
But the speeds in the SSD in the USB box directly to the USB 3.0 port (above) and through the hub (below) coincide with the accuracy of the measurement error


I chased the SSD with another USB-SATA bridge (described), without external power and on the hub and on the bridge - there is enough power, nothing falls off.
In the role of the charging device; TL; DR The phone charges. But even with the simplest network charging competition does not hold.
The guilt that the designer that the seller is not hereI see - everything that the chip maker has provided is used. More is needed - they make the USB port dedicated only for power. I saw on sale and such hubs - a few ports for data, a few - only for charging.
More details.
The seller on the page there is such a picture

What to say is true. The phone is really charging - cf. the inscription "from the network"

But we are on Muska,

We connect the controlled load to the hub port (green) and to the computer's USB port (blue) and drive current (red) from zero to 2 amps, step 0.1, voltage cut-off 4 volts - hereafter

That is, the hub order worsens the characteristics of USB 3.0 port of my computer (a discrete card with power through Molex - described) in terms of using it to charge gadgets.
(Further, I turned off the display of current curves so as not to be confused. One small cell on the abscissa axis is approximately 0.1A)
Power supply - regular
We look at three voltage graphs.
green - without external power
blue - external power only, no USB connection
black - and USB and external power

What to say about Sakhalin ...
Maybe the fact is that the BP staff we have is weak? Only 1A?
I take a very good charge from Ugreen (described, by the way, with a description of fast charging technologies, I managed to publish it on the eve of 11.11
WAH charging Ugreen CD122


green - without external power
blue - and USB and Ugreen CD122
black - and USB and regular BP

That is, the situation has improved. But, frankly, very slightly. So, the above statement of the manufacturer of the hub chip manufacturer for fast charging should in no way be taken as a call to send network charges to resign. Well, on bezrybe and cancer - fish.
Advantages and disadvantages + Excellent embedded form factor, especially if you do not have a USB 3.0 hub in the monitor - it does not take up space, it is always at hand
+ Allows you to use the usually idle rear panel ports, USB and audio, and with a minimum length of wires.
+ 100% compatibility. The used GL3520 chip is the most common USB 3.0 (it's Gosh, it's Gog USB 3.1 Gen 1)
+ External power supply, power supply included
- Three USB 3.0 ports, the fourth is not decoupled, just did not fit
- Explicit excess of non-flushed flux on board
- As a charger with a bang, loses any network charging. But there is no fault designer
- Children's bug with earthen wires. The speed does not affect, but it looks extremely unpleasant. And this is just the designer's fault.
Easy tuning on my back panel displayedeSATA and Molex, neither one nor the other is practically not used. If I insert this hub into my desk (I’m going to, but I prefer to give such an idea to lie down - then it’s harder to plug the hole) - then I will cut off the wire from the power supply unit and attach a Molex connector. Still, if there is a powerful ATX BP in 10 cm, a separate small plug into the socket is for office plankton.
TotalHub is made for office use, butIt fits into the home environment with a minimum set of hands. Since it will be necessary to drill a hole ⌀60 in the tabletop and, possibly, to solder the power supply.