Disassembly
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As I suspected from the test results, this power supply is very similar internally to the Infinity IN08-450. It’s input filtering consists of three X-Capacitors, two coils, and six Y-Capacitors, and one MOV. It also employs a 6A rectifier, and 12A E13009L switching transistors. As you can see from the above right picture, they are visibly burned from when they exploded. The 5vSB circuit uses the same FSDM311A IC as the Infinity, although this time around, there was some slight heat discolouration on the PCB under it. To discolour the PCB noticeably after only 2 hours worth of testing, the IC would have to be getting extremely hot, so this indicates a serious design flaw with the 5Vsb circuit. The only difference between the primary side of this unit and that of the Infinity is the use of 820µF Capacitors as opposed to the 680µF parts found in the Infinity.
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The output filtering is the same as on the Infinity, with ChengX capacitors, and no PI filtering coil on the 12V rail. As I said in the Infinity review, this is less than ideal. I would prefer to see more reliable capacitors and some better output filtering on the 12V rail.
The rectifiers used are also the same as those used on the Infinity. The 12V rail uses the same two 20A MBR20150CTP Rectifiers, and the other two rails use the same 30A MOSPEC S30D45CS rectifier. The monitoring IC is a Richtek R7510A. Since this IC lacks Over Current Protection (OCP) support, this is a single rail power supply.
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The soldering is a little better than we saw with the Infinity, but is still not great. There were a few long component legs and joints which could have used a little more solder. The messiest area was around the switching transistors, although that was probably caused by the explosion. There was a foam pad under the primary side, which is probably why the PCB didn’t get covered in soot, like it did on the Power Logic Magnum Pro 315.
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Unlike the fan on the Infinity, this fan has a UL number on it (E313551), so I was able to identify the manufacturer as being Boluo Xin Zhen Heng Electronics. There was a small amount of oil in the bearings, but much of it had leaked out, as the plug didn’t have a particularly tight seal. The heat sinks are somewhat smaller than those on the infinity, which is one of very few differences. The only other differences are the larger primary capacitors (already mentioned), and the larger ERL-39 transformer (as opposed to an ERL-35 in the Infinity).
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