A Look Inside

This design is one of the nicest and cleanest we have ever seen in a retail PSU. Placement of components and also the PCB routing is extremely well done and soldering quality is outstanding. It's only a bit surprising the that case didn't receive a special treatment in terms of extravagant looks.

The design is based on a strong 12V PSU using the LLC resonance converter topology. 3.3 and 5V are generated from 12V using DC-DC converter. This topology is very common in modern PSU's.

Right at the AC input there are two Y and one X capacitors for filtering. Filter is continued by four Y, two X Caps, one MOV and two CMR Chokes, which got placed on the main PCB. The rectification is done using two  LL25XB60 (each 600V, 25A). The APFC uses three AOTF27S60 Mosfets (700V, 27A, 0.16Ohm) and a C3D10060 (600V, 10A, Qc 25nC) SiC Diode. Two Nippon Chemi-Con (450V, 470uF, 105C each) are used as APFC capacitors. The APFC is controlled by a CM6502 and the LLC resonance converter by a CM6901. The main transformer is directly connected to the daughter PCB with the 12V Mosfets. The 12V filtering is well done as well as the the distribution of GND and +12V. The converters for 3.3 and 5V are located on a daughter PCB next to the connector PCB.

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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