A Look Inside

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

Directly at the AC input we can see two Y capacitors for burst pulse filtering. On the main PCB the filtering continues with one Y, one X caps, one MOV and two CM chokes for the input filtering. The rectification is done using a GBU806C (8A, 600V) fixed to a heatsink. The APFC uses two Mosfets (FQA24N50 500V, 0.20 Ohm) and a QH8TT600 (600V, 8A, trr 19.5ns, Vf  2.6V) Diode. One Aishi (400V, 470uF, 85C) is used as APFC capacitor. The LLC resonance converter is controlled by a CM6502S. On the primary side there are two more FQA24N50 (500V, 8A, 0.2 Ohm) mosfets. With this PSU most heatsinks are plain metal plates.

For 12V rectification there are six 9990GH (60V, 70A, 6.0 mOhm) mosfests, which have been place directly into the air stream of the fan, but the have not been attached to a specific cooler. On the secondary side, Nilox decided to use CapXon 105C capacitors for DC filtering. The 3.3V and 5V converters are located at the back end of the PCB. The cables of the connectors are split here between 12 and 3.3, 5V for a good reason and are soldered to the correct place. Overall this is a low cost design, which has been done decently.

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Page 1 - Presentation

Page 2 - Photo Gallery

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