Disassembly
_
The input filtering consists of two X-Capacitors, two coils, four Y-Capacitors, and two MOVs, which is more than enough components for the job. The two primary capacitors are rated at 560uF and are supplied by Teapo. Two Toshiba 2SK3568 MOSFETS are used as the switching transistors in two transistor forward configuration. They are controlled by an ST Micro UC3845B Current Mode PWM controller IC.
_
The capacitors on the secondary side are all Samxon GF series (with the exception of one OST). This units larger cousins both got one point knocked off for using OST caps. Samxon GF capacitors are generally considered to be a notch below them in terms of reliability. That, combined with the fact that one is just about touching the 5vsb rectifier diode (meaning that it will be getting warmed up 24/7) will cost it an additional point. I’ll be replacing those two 5vsb capacitors with high quality Panasonic FR caps before this unit goes back together.
_
The 12V output uses two SIRectifier MBR20B100CTH schottky rectifiers rated at 20A each. Considering that the label claims up to 240W (20A) of total 12V capacity, two of these parts are more than enough. The other two rails use a single Lite-On SBL3045CT schottky rectifier, which is rated at 30A. Again, these parts are more than enough for what the label claims these rails to be capable of. The secondary side is controlled by a RichTek R7510A. It only supports Over Voltage and Under Voltage Protections. It doesn’t support Over Current Protection, which is required to separate the 12V rails, so this is a single rail unit.
The soldering quality on this unit is great. The component pins are all cut to appropriate lengths, and all of the joints have an appropriate amount of solder on them.
_
The fan is supplied by ARX. It uses ARX’s CeraDyne A Bearing, which is essentially a modified sleeve bearing, using an alloy sleeve and a ceramic shaft. There is plenty of oil under the sticker, but there is no rubber plug to prevent it leaking out, as this is difficult to do on a 15mm thick fan. The adhesive on the sticker is much stronger than it is on most stickers, however, so hopefully, this will do an adequate job of sealing the bearings and preventing the oil from leaking out.
The fan has speed, noise and airflow ratings of 2500RPM, 26.5dBA and 25.96CFM respectively. As mentioned earlier, it was only quiet during Test 1, noticeable in Test 2, and was running at full speed by Test 3 at 200W load. It wasn’t disturbing at this speed, but it’s loud enough that you wouldn’t want to use it in your HTPC.
The heatsinks are smaller than you’d expect to find in a full sized unit, but they are good enough for a more efficient 300W power supply.
Loading ...