Component Analysis

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Ideally, the modular panel would have been connected to the main PCB through bus bars instead of cables, for which energy losses are higher, especially under high loads. Moreover, these cables block airflow on the secondary side, reminding me of older designs. The heatsink on the primary side is quite large since it hosts the bridge rectifiers, most of the APFC converter's parts, and the main FETs. The heat sinks on the secondary side, on the other hand, are small since the +12 V FETs are installed on the PCB's solder side.


The transient/EMI filter stages have all the necessary parts, offering decent EMI suppression on incoming and outgoing emissions.


A metal oxide varistor (MOV) handles voltage surges, while an NTC thermistor and relay combination suppresses large inrush currents.


The bridge rectifiers are bolted to the primary heatsink, so they can handle up to 15 A each, at 100 °C.


The APFC converter uses two Infineon FETs and a single CREE boost diode that is quite strong. The bulk caps are by Nichicon, and their combined total capacity is 1360 uF.


The APFC controller is an Infineon ICE3PCS01G, so I expect good PF readings since Infineon ICs perform better than corresponding Champion ones in this section.


The main FETs are two Infineon IPA60R120P7s installed in a half-bridge topology. An LLC resonant converter is also used to boost efficiency. The resonant controller is the omnipresent Champion CM6901X.


The unit's main transformer is large enough to cope with the load.


The FETs regulating the +12 V rail are installed on the solder side of the main PCB. The heatsinks above them lower their operating temperatures.


Two DC-DC converters generate the minor rails. They use five Vishay FETs, and their joint PWM controller is an Anpec APW7159C.


Most electrolytic caps are by Teapo and belong to the cheap SC line, which I would avoid exposing to stressful conditions because of their short lifetime. If you operate the PSU at normal temperatures, these will last for quite a while, but the higher the operating temperatures, the shorter their lifespan. Besides electrolytic caps, I also found sixteen Teapo polymer caps.


The 5VSB circuit uses an IPS FET on its primary side and a 45R15C SBR on its secondary side. The standby PWM controller is a Si-Trend SI8016HSP8.

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The supervisor IC is a Weltrend WT2527RA, which provides all essential protection features. It is on the same board as the APFC controller.


The Teapo polymer caps on the modular board improve ripple suppression on all rails.


Soldering quality is good.


The cooling fan is by Globe Fan and uses a fluid dynamic bearing, so it is of good quality. The STC STC15W408AS looks to be the fan controller.