A Look Inside

Next to CWT, Delta, Seasonic and Super Flower, In Win is one of the very few vendors with its own production line for power supplies. Therefore the vendor has all the freedom in the world designing their own PSU platforms. Nevertheless In Win doesn’t yet have as large as an engineering team as the big players in the business, but this doesn’t stop them from coming up with their own 80Plus Platinum platform.

In case of topology the C 900W is making use of a half-bridge build on the primary side and synchronous design on the secondary side. Right behind the AC receptable there is the first part of the EMI filtering stage, which consists of two Y and one X capacitor as well as an MOV and ferrite ring. Following the current we find two very high-quality LL15XB60 bridge rectifiers, which have been attached to an aluminum heatsink. After those there is the APFC converter, where two Infineon IPP60R125P6 FETs and a CREE C3D10060A diode are doing their job. The two bulk capacitors with 390 micro Farrad of capacitance come from Nippon Chemi-Con. Their total of 780 micro Farrad of capacitance is rather low considering this is almost a 1kW PSU. Therefore it’s not surprising, there is an additional NTC Thermistor helping to take care of inrush current. The APFC stage is being controlled by a NCP1654 controller from On Semiconductor. Also on the primary side there are two IPW60R160P6 FETs from Infineon mounted in half-bridge topology and apart from that there is an LLC resonance converter, which helps in boosting efficiency to 80Plus Platinum levels. Going further we find a Champion CM6901 resonance converter, which has been soldered to a perpendicularly mounted daughter board. On the back side at this point there are four Alpha & Omega AON6590 FETs, which are regulating the four +12V rails. Their heat is being dissipated to the C 900Ws aluminum enclosure. The entire unit has only been equipped with one thermistor and it has been attached to the heatsink, which helps removing heat from the +12V rails. Soldered to yet another two daughter boards there is a total of eight D528 FETs, which are being controlled by an Anpec APW7160A PWM controller in order to help regulate the VRMs. Additional filtering is handled by a mix of polymer and electrolyte capacitors, which all come from Nippon Chemi-Con.

Looking for the modular connector panel, there is another, rahter large daughter board, which as been boltend and soldered to the main PCB. Also here we find capacitors from Nippon Chemi-Con, which add theirs to this units good ripple values. The supervisor IC in this case comes from Weltrend and goes by the name WT5759.

As we already mentioned the overall quality of this PSU is on a good and solid level, which is also something you see on the backside of the main PCB. Soldering quality at this point is clean and therefore blends in with the units overall quality.

Page 1 - Introduction

Page 2 - Preview

Page 3 - Delivery / Specs

Page 4 - A Look Inside

Page 5 - Result Analysis and Discussion

Page 6 - Conclusion