Component Analysis

Before reading this page, we strongly suggest looking at this article, which will help you better understand the insides of a PSU.



Enhance Electronics provides this platform, and it is powerful. The heatsinks are not large, and there is ample space on the right side of the PCB. The interleaved PFC controller uses two large chokes. The two main transformers, installed in parallel, handle the primary side's output and electrically isolate the primary from the secondary side. Overall build quality is good, and the parts Enhance used are of high quality. The board holding the +12 V FETs is installed right next to the main transformers to save space and minimize energy losses.


The transient/EMI filter stages have all the necessary parts and suppress EMI emissions well enough.


Two Metal Oxide Varistors (MOV) handle voltage surges, while an NTC thermistor suppresses large inrush currents. A bypass relay supports the latter.


The bridge rectifiers are bolted to a pretty large heatsink. There was no way to identify them without lots of desoldering, which I wanted to avoid.


The APFC converter uses two Oriental Semiconductor FETs and two powerful CREE boost diodes. The bulk caps are by Nippon Chemi-Con and offer 2040uF combined capacity. An interleaved design is used, where two APFC converters operate in parallel with a phase difference among them. This leads to minimized input/output current ripple, lower conduction losses, higher efficiency, and effective switching frequency doubling.


The APFC controller is an ATK AT6201ZSPF.


The four main switching FETs are installed in a full-bridge topology, and an LLC resonant converter is used for higher efficiency. The resonant controller is an ATK AT6301ZTSF.


There wasn't enough space for a huge main transformer, so two smaller ones were installed in parallel.


The +12 V board is as close as it gets to the main transformers, which minimizes energy losses.


The electrolytic filtering caps are of high quality, and lots of Unicon polymer caps are also used.


Two DC-DC converters generate the minor rails. Things are pretty tight here, too, so I couldn't identify the parts used.


This is the board responsible for the 5VSB rail's regulation.


The standby PWM controller is an ATK AT6002H.


The supervisor IC is a Weltrend WT7527RA.


Twelve polymer caps at the face of the modular panel form an extra ripple-filtering layer.


Soldering quality is good.


The cooling fan is by Globe Fan, and its model number is RL4Z B1352512EH-3M. It uses double ball-bearings, which are tolerant to heat.