Part Analysis
| General Data | |
| Manufacturer (OEM) | CWT (GPW platform) |
| PCB Type | Single-Sided |
| Primary Side | |
| Transient Filter | 2x Y caps, 2x X caps, 2x CM chokes, 1x MOV |
| Inrush Protection | NTC Thermistor SCK-056 5Ohm & Relay |
| Bridge Rectifier(s) |
1x GBU15005 (600V, 15A @ 100°C)
|
| APFC MOSFETs |
2x Wayon WML28N50C4 (500V, 16A , Rds(on): 0.125Ohm) &
1x Syncpower SPN5003 FET (for reduced the no-load consumption) |
| APFC Boost Diode |
1x CRMICRO CRXI06D065G2 (600V, 6A @ 167°C)
|
| Bulk Cap(s) |
1x Teapo (400V, 560uF, 2000h @ 85°C, LH)
|
| Main Switchers |
4x Silan Microelectronics SVF20N50F (500V, 12.6A @ 100°C, Rds(on): 0.27Ohm)
|
| APFC Controller |
1x Champion CM6500UNX
|
| Resonant Controller |
Champion CM6901X
|
| Topology |
Primary side: APFC, Full-Bridge & LLC converter
Secondary side: Synchronous Rectification & DC-DC converters |
| Secondary Side | |
| +12V MOSFETs | 6x Infineon BSC014N04LS (40V, 100A @ 100°C, Rds(on): 1.4mOhm) |
| 5V & 3.3V | DC-DC Converters: 4x Infineon SPN3006 (30V, 57A @ 100°C, Rds(on): 5.5mOhm) PWM Controller(s): APW7159C |
| Filtering Capacitors | Electrolytic: 11x Chengx (2-3,000h @ 105°C ,GR) Polymer: 14x CapXon |
| Supervisor IC | IN1S313I-DAG |
| Fan Model | Martech DF1202512FDHN (120mm, 12V, 0.42A, Fluid Dynamic Bearing Fan) |
| 5VSB Circuit | |
| Standby PWM Controller | Power Integrations TNY290 |
The OEM of this PSU is Channel Well Technology (CWT), and the platform’s code name is GPW, which looks to be a cut-down GPX design. This is not a popular platform, but it uses a contemporary design. We find a full-bridge topology on the primary side. I remember these Silan FETs from the DeepCool GamerStorm DQ-M PSU review, which uses the GPX platform. Finding a full bridge on a budget-oriented PSU is weird, but CWT can use four lower-cost ones instead of two more capable (and more expensive) FETs. An LLC resonant converter is also used to minimize energy losses.
On the secondary side, we find the typical stuff: a synchronous rectification scheme for 12V and a pair of DC-DC converters for the minor rails. CWT used good FETs on the secondary side to avoid issues, but the caps don’t belong to a recognized manufacturer. Chengx makes caps for all popular Japanese brands, including Rubycon and Chemi-Con. The same goes for the bulk cap, which is by a good brand, Teapo, but only rated at 85°C. Nevertheless, it will probably not have a problem outliving the five-year warranty if you don’t use it under extreme operating conditions. Probably now, with the drop in hold-up time requirement, brands will be able to use higher-quality bulk caps.
The cooling fan is by Martech to keep the cost down. Hong Hua and Globe Fan products are more expensive, and there is no room here for costly parts. It claims that it uses a fluid dynamic bearing, which will help it live more.
pylon replacement
Wanna see more PCIe cables, and it would be good a 105°C cap