Part Analysis
| General Data | |
| Manufacturer (OEM) | ZHONG YUAN POWER |
| PCB Type | Double-Sided |
| Primary Side | |
| Transient Filter | 4x Y caps, 2x X caps, 2x CM chokes, 1x MOV |
| Inrush Protection | 1x NTC Thermistor & Relay |
| Bridge Rectifier(s) |
2x GBU25M (1000V, 25A @ 60°C)
|
| APFC MOSFETs |
3x Sanrise SRC60R090B (600V, 17.8A @ 125°C, Rds(on): 90mOhm)
|
| APFC Boost Diode |
2x Global Power G3S06506D (650V, 6A @ 159°C)
|
| Bulk Cap(s) |
1x Nippon Chemi-con (420V, 1150uF, 2,000h @ 105°C, KHE)
|
| Main Switchers |
2x Sanrise SRC60R068BS (600V, 21.5A @ 125°C, Rds(on): 68mOhm)
|
| Resonant Controller |
Monolithic Power HR1213
|
| APFC Controller |
Infineon ICE2PCS01
|
| Topology |
Primary side: APFC, Half-Bridge & LLC converter
Secondary side: Synchronous Rectification & DC-DC converters |
| Secondary Side | |
| +12V MOSFETs | 8x Alpha & Omega AON6152A (45V, 100A @ 100°C, Rds(on): 1.15mOhm) |
| 5V & 3.3V | DC-DC Converters: 4x Alpha & Omega AON6512 (30V, 130A @ 100°C, Rds(on): 1.7mOhm) PWM Controller(s): ANPEC APW7159A |
| Filtering Capacitors | Electrolytic: 3x Nippon Chemic-con (105°C, W) 1x Nippon Chemic-con (2-5,000h @ 105°C, KZE) 1x Nippon Chemic-con (5-6,000h @ 105°C, KZH) 1x Nippon Chemic-con (4-10,000h @ 105°C, KY) Polymer: 20x Nippon Chemic-con, 1x |
| Fan Model | Hong Hua HA1225M12F-Z (125mm, 12V, 0.45A, Fluid Dynamic Bearing Fan) |
| 5VSB | |
| Rectifiers | |
| Standby PWM Controller | Xuanyan XY6115 |
A promising new OEM, Zhong Yuan Power, provides the platform. The PCB is tiny and overloaded with parts, especially on the secondary side. The good thing is that the electrolytic and polymer filtering caps on the secondary side have a clear path to the fan’s airflow, so I wouldn’t worry much about their reliability through time and under harsh conditions.
The unit’s main transformer is tiny, and right next to it resides the resonant tank and the capacitive part of the LLC resonant converter. Besides the aforementioned converter, the platform uses a half-bridge topology on the primary side and a synchronous rectification scheme on the secondary side, with eight FETs regulating the 12V rail and two DC-DC converters generating the minor rails. All capacitors are from good manufacturers, while the FETs on the primary side are from a less-known manufacturer. Lastly, the cooling fan is by Hong Hua, so it is of high enough quality.
The soldering quality is decent, and there is little to see on the PCB’s solder side since all major parts are installed on its business side. It is interesting to see a fresh platform by a new OEM entering the high-capacity PSU market, and probably other OEMs will use this platform as well, given that it is priced well and its performance and reliability are high enough.
Is it just me or could the PSU have performed significantly better in ripple suppression and transient response if they hadn’t gone with such an extremely low amount of secondary caps on the secondary side?
I count 27 caps or which many are fairly small. Other manufacturers like Seasonic are liable to use over 50 caps in that power class.
Yes the form factor is small but they definitely had space for more caps on the breakout board. They cheaped out, which is a pity.
Aris would you review Antec SF850X & Gamemax GX-1050 PRO ?
if they send them to me sure 🙂
UPMOST? XD
It’s nice to see that there is so much optimism and imagination around.
This should lead to improvement.