Part Analysis
| General Data | ||
| Manufacturer (OEM) | CWT | |
| Platform | GPW | |
| PCB Type | Single-Sided | |
| Primary Side | ||
| Transient Filter | 2x Y caps, 1x X caps, 2x CM chokes, 1x MOV. 1x CAP200DG (Discharge IC | |
| Inrush Protection | 1x NTC Thermistor SCK-056 (5 Ohm @25°C) & Relay | |
| Bridge Rectifier(s) |
1x GBU1506 (800V, 15A @ 150°C)
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| APFC MOSFETs |
2x Way-On WML28N50C4 (500V, 16A @ 100°C, Rds(on): 0.125Ohm)
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| APFC Boost Diode |
1x CRMICRO CRXI06D065G2 (600V, 6A @ 167°C)
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| Bulk Cap(s) |
1x Chengx (400V, 560uF, 2000h @ 85°C ,AP)
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| Main Switchers |
4x Silan Microelectronics SVF13N50F (500V, 8.2A @ 100°C, Rds(on): 0.52Ohm)
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| Resonant Controller |
Champion CM6901X
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| APFC Controller |
Champion 6500UNX
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| Topology |
Primary side: APFC, Full-Bridge & LLC converter
Secondary side: Synchronous Rectification & DC-DC converters |
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| Secondary Side | ||
| +12V MOSFETs | 6 x IPS FTG014N04SA | |
| 5V & 3.3V | DC-DC Converters: 4x SPN3006 (30V, 57A @ 100°C, Rds(on): 5.5mOhm) PWM Controller(s): 1x ANPEC APW7159 |
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| Filtering Capacitors | Electrolytic: 11x Chengx (2-4,000 @ 105°C, GR), Polymer: 9x CapXon , 3x Chengx , 3x Elite |
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| Supervisor IC | INI1S429I – DCG | |
| Fan Model | Martech DF1202512SEHN (120mm, 12V, 0.42A, Fluid Dynamic Bearing Fan) | |
| 5VSB Circuit | ||
| Standby PWM Controller | Power Integrations TNY290 | |
The OEM is Channel Well Technology (CWT), and the platform’s code name is GPW. This platform is below the CSZ and GPX in terms of cost and performance, with the first being the most popular ATX v3.x platform.
Some might wonder how a full-bridge platform can be less expensive than a half-bridge CSZ platform. Well, the answer is simple. CWT used four lower-quality FETs, which cost less than two high-quality ones, dropping the production cost. Moreover, in this unit, the fan is provided by a budget OEM, Martech, instead of the usual one that CWT has, Hong Hua. I cannot say that I am fond of Martech’s products.
The FETs on the primary side are by Way-On and Silan, two less-known manufacturers, not as well known as Infineon. The bulk cap is by Chengx, a huge cap manufacturer that handles the production of some of the top Japanese cap brands. On the secondary side, the 12V rail is regulated by IPS FETs, and a pair of DC-DC converters generate the minor rails. The filtering caps on this site are by Chengx (electrolytic and polymer), CapXon (polymer), and Elite (polymer). I wouldn’t worry about the capacitor quality, but I am worried about the fan’s reliability in the long run. This PSU comes with a ten-year warranty, which I cannot be sure whether this fan will be able to outlive, especially under non-optimal conditions. Yes, it uses a rifle bearing, which is way better than a plain sleeve bearing, but still, this manufacturer’s products are not considered as good as Hong Hua’s, for example. A simple fan change can bump the price by several dollars, though, which can affect the production cost notably.
Hi, is there a chance to test the Seasonic Focus GX-850W power supply in the ATX 3.0 version?
Will try to 🙂
thanks 😀
Probably just a typographical error. I suggest you correct the amperage on the 12 volt rail from 6,205 amps to 62.5 amps.
I agree with your review. The psu may be budget oriented but it does need a few improvements.
thanks!