Part Analysis
| General Data | |
| Manufacturer (OEM) | Great Wall |
| PCB Type | Double-Sided |
| Primary Side | |
| Transient Filter | 2x Y caps, 2x X caps, 2x CM chokes, 1x MOV |
| Inrush Protection | 1x NTC Thermistor SCK-056 (5 Ohm) & Relay |
| Bridge Rectifier(s) |
2x Vishay GBUE2560 (600V, 25A @ 140°C)
|
| APFC MOSFETs |
1x Infineon IPW60R060C7 (650V, 22A @ 100°C, Rds(on): 0.060Ohm) |
| APFC Boost Diode |
1x Infineon IDH10G65C6 (650V, 10A @ 140°C)
|
| Bulk Cap(s) |
1x Rubycon (420V, 550uF, 3,000h @ 105°C, MXK)
|
| Main Switchers |
2x Fuji Power MOSFET FMP60N094S2FDHF (600V, 20.7A @ 100°C, 0.094Ohm)
|
| APFC Controller | Champion CM6502UHHX |
| Resonant Controller | Champion CM6901X |
| IC Driver | 1x Novosense NSi6602BD |
| Topology |
Primary side: APFC, Half-Bridge & LLC converter
Secondary side: Synchronous Rectification & DC-DC converters |
| Secondary Side | |
| +12V MOSFETs | 6x Infineon BSC014N04LS (40V, 125A @ 100°C, Rds(on): 1.4mOhm) |
| 5V & 3.3V | DC-DC Converters: 4x Advanced Power AP4024GEMT (30V, 60A, Rds(on): 4.5mOhm) PWM Controller(s): ANPEC APW7159C |
| Filtering Capacitors | Electrolytic: 2x Rubycon (3-6,000h @ 105°C, YXG) Polymer: 3x United Chemi-Con, 40x FPCAP |
| Supervisor IC | IN1S429I-SCG (OCP, OVP, UVP, SCP, PG) |
| Fan Controller | Microchip PIC16F1824 |
| Fan Model | Corsair NR092P (92mm, 12V, 0.22A, Fluid Dynamic Bearing Fan) |
| 5VSB Circuit | |
| Rectifier |
1x Infineon ICE5QR1680AG (800V, 5.8A, Rds(on): 1.75Ohm)
|
| Standby PWM Controller | Infineon ICE5QR1680AG |
Great Wall is the OEM of all SF and SF-L units. It is a Chinese government-owned company, so it has plenty of resources. The PCB is small and densely populated with components to deliver 850W max power. The primary heatsink, hosting, among other things, the bridge rectifiers, is pretty large, while the heatsink on the secondary side is small since the FETs that regulate the 12V rail are installed on the PCB’s bottom side. Overall, the build quality is high, with expensive parts and nearly impeccable soldering quality. Great Wall has state-of-the-art production lines, so I didn’t expect anything less in soldering quality. I had the chance to visit all of GW’s factories and production lines in 2023, and the production of the new SF line took place at the time of my visit.
The design is typically found in every modern PSU nowadays. A half-bridge topology on the primary side, after the APFC converter’s stage, while an LLC resonant converter boosts efficiency through an (almost) lossless switching. A synchronous rectification scheme, including six Infineon FETs, on the secondary side, regulates the 12V rail. The minor rails are generated from a pair of DC-DC converters utilizing an ANPEC PWM controller. Rubycon provides the few electrolytic caps on the secondary side, while many polymer caps handle ripple filtering. The fan controller is a Microchip digital controller, making the fan speed profile programming easy. The cooling fan uses a fluid dynamic bearing and has a diameter of 92mm. Lastly, the standby circuit uses Infineon parts.
Great Wall gathered vast experience over the years by cooperating with Corsair to produce SFX units, and this is why it is now the number one force in this market segment.
