A Look Inside

The first hint for a high Quality PSU we can see already when we take a first look at it. At this point we get a nice design and high quality case.

Right at the input there are two X capacitor. On the main PCB the transient filtering stage continues with two X and four Y caps and there is also one CM choke and one MOV (Metal-Oxid-Varistor). Additionally there is an NTC thermistor for inrush current limitation. A mechanical relay shorts the NTC thermistor for normal operation. The transient filtering stage is well done.

Rectification is being handled by two bridge rectifiers in the case of this PSU. The PFC booster consists of two IPP50R199P mosfets and two C3D06060A SiC shottky diodes. The APFC is controlled by an NCP1653A from ON Semiconductor. This PSU features two APFC capacitors from Nippon Chemi-Con (KMR series; 300uF and 400V at 105°C). The total capacitance of 600uF is competitive for a 850W PSU. The LLC resonance converter, is controlled by an ASIC with the name AA9013.

Either the overall build quality as well as the quality of the components used make this an excellent product, which will provied power reliably over years.

On the secondary side there are 4 IPP041N04N (40V, 4.1mOhm, 80A) mosfets to take care of 12V rectification. These mosfets are directly cooled via 2 heatsinks. The design of the secondary side is solid. 3.3 and 5V are generated from 12V using DC-DC conversion. Those are located on two Daughter PCBs. The DC filtering is done using Nippon Chemi-Con capacitors. Those are extremely high end. The connection of the main PCB to the connector PCB is well done. The connector PCB has some additional capacitors from Capxon which are non Japanese.

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Page 1 - Introduction

Page 2 - Preview

Page 3 - Delivery / Specs

Page 4 - A Look Inside

Page 5 - Input/Output Power and Efficiency

Page 6 - Result Analysis and Discussion

Page 7 - Conclusion