Part Analysis
| General Data | |
| Manufacturer (OEM) | Great Wall |
| PCB Type | Double-Sided |
| Primary Side | |
| Transient Filter | 4x Y caps, 2x X caps, 2x CM chokes, 1x MOV |
| Inrush Protection | NTC Thermistor SCK205R0 (5 Ohm @ 25°C) & Relay |
| Bridge Rectifier(s) |
1x
|
| APFC MOSFETs |
1x Infineon IPW60R060P7 (650V, 30A @ 100°C, Rds(on): 0.060Ohm)
|
| APFC Boost Diode |
1x WeEn WNSC60D06650 (650V, 6A @ 156°C)
|
| Bulk Cap(s) |
1x Nippon Chemi-con (450V, 560uF, 2000h @ 105°C, KMW)
|
| Main Switchers |
2x STMicroelectronics STW24N60DM2 (650V, 11A @ 100°C, Rds(on): 0.200Ohm)
|
| PFC/LLC Combo Controller | MPS HR1280 |
| Topology | Primary side: Semi-Digital, APFC, Half-Bridge & LLC Resonant Converter Secondary side: [12V] Synchronous Rectification & [Minor Rails] DC-DC converters |
| Secondary Side | |
| +12V MOSFETs | 4x Diodes Incorporated DMT4002LPS (40V, 70A @ 100°C, Rds(on): 1.8mOhm) |
| 5V & 3.3V | DC-DC Converters: 4x Diodes Incorporated DMT3004LPS (30V, 17A @ 70°C, Rds(on): 3.8mOhm) PWM Controller(s): ANPEC APW7159C |
| Filtering Capacitors | Electrolytic: 10x Nichicon (10,000h @ 105°C, HW(M)) 1x Nichicon (6,000 @ 105°C, HV(M)) 1x Rubycon (4-10,000 @ 105°C, YXF) 1x Rubycon (6-10,000 @ 105°C, ZLH) Polymer: 29x FPCAP |
| Supervisor IC | IN1S3151-SAG |
| IC Driver | MPS MP6924B |
| MCU | STMicroelectronics STM32C011F6P3 |
| Fan Model | Corsair NR140HP (140mm, 12V, 0.33A, Fluid Dynamic Bearing Fan) |
| 5VSB Circuit | |
| Rectifier (High Side) |
1x DMT10H009LPS (100V, 8A @ 70°C, Rds(on): 8mOhm)
|
| #Standby PWM Controller | Power Integrations TNY288GG |
Great Wall builds this platform around the MPS HR1200 controller, which integrates a digital PFC stage and a half-bridge resonant controller into a single chip. The layout is compact, with appropriately sized heatsinks, and the secondary side has ample open space to promote good airflow. This allows the fan to operate at lower speeds while still dissipating heat efficiently, resulting in lower noise levels. A key detail is that the minor-rail regulation circuits are mounted directly on the main PCB rather than on a daughterboard, placing them directly in the fan’s airflow. This improves cooling and prevents minor rail load changes from causing noticeable increases in fan speed—a common issue in many other designs, especially those from CWT.
Great Wall used quality components on this platform, including STMicroelectronics and Infineon FETs and Japanese capacitors. These parts don’t come cheap, which explains the stiff MSRP.
The transient filtering stage contains all the necessary components to block both incoming and outgoing EMI emissions. Typically, it starts at the AC receptacle and continues on the main PCB.
There is an MOV to protect from voltage surges and an NTC thermistor with a resistance of 5 ohms. Moreover, a bypass relay supports the NTC thermistor.
The single bridge rectifier converts the incoming AC signal to a loosely regulated DC voltage.
The APFC converter uses one Infineon IPW60R060P7 FET and a single WeEn WNSC60D06650 boost diode. Chemi-Con manufactures the bulk capacitor. Its capacity is 560 μF, and it is rated for 2,000 hours at 105 °C. The voltage rating is 450V, which is way above the APFC’s DC bus voltage (approximately 380-400V DC).
Two STMicroelectronics STW24N60DM2 primary-switching FETs are used in a half-bridge topology, and an LLC resonant converter is employed for enhanced efficiency.
The MPS HR1280 is the combo PFC and LLC resonant controller. This controller combines PFC and LLC in a single chip, reducing BOM and board area while simplifying design compared to using two separate ICs (CM6502 + CM6901). It is also optimised for low no-load power (vampire power) to meet new and upcoming efficiency specifications. Its more notable feature over the corresponding duo of Champion controllers is that it is digitally controlled, making it much easier to tune it to the desired usage scenario.
The PSU’s main transformer. One of its main functions is to electrically isolate the primary and secondary sides.
Four Diodes Incorporated DMT4002LPS FETs regulate the 12V rail. They are installed on the business (top) side of the PCB.
Two DC-DC converters generate the minor rails. They use four DMT3004LPS FETs. The PWM controller is an Anpec APW7159C.
Rubycon and Nichicon provide the electrolytic capacitors. FPCAP makes the polymer capacitors.
You can find more information about capacitor performance and other specs below:
The standby PWM controller is a Power Integrations TNY288GG.
Many polymer caps on the modular panel’s face form an additional ripple-filtering layer.
The supervisor IC is an IN1S3151-SAG.
There are no parts installed on the PCB’s solder side.
The unit’s MCU is a STMicroelectronics STM32C011F6P3.
The cooling fan is a Corsair NR140HP that uses a fluid-dynamic bearing.
