Part Analysis
| General Data | |
| Manufacturer (OEM) | Helly Technology (ATX0800GB) |
| PCB Type | Double-Sided |
| Primary Side | |
| Transient Filter | 2x Y caps, 1x X caps, 2x CM chokes, 1x MOV |
| Inrush Protection | 1x NTC Thermistor MF73T-1 (20 Ohm ) & Relay |
| Bridge Rectifier(s) |
2x
|
| APFC MOSFETs |
2x Oriental Semiconductor OSG55R140H (550V, 14.5A @ 100°C, Rds(on): 0.14Ohm)
|
| APFC Boost Diode |
1x G3S06510A (650V, 10A @ 155°C)
|
| Bulk Cap(s) |
1x Nichicon (400V, 820uF @ 105°C, GL)
|
| Main Switchers |
2x FuXin Semiconductor FXN45N50T (500V, 16.7A @ 100°C, Rds(on): 0.20Ohm)
|
| APFC Controller |
Champion CM6500UNX
|
| Resonant Controller |
Champion CM6901T6X
|
| Topology |
Primary side: APFC, Half-Bridge & LLC converter
Secondary side: Synchronous Rectification & DC-DC converters |
| Secondary Side | |
| +12V MOSFETs | 8x Allpower APG013N04G-AU (40V, 100A @ 100°C, Rds(on): 1.3mOhm) |
| 5V & 3.3V | DC-DC Converters: 2x XSEMI XP3NA3R4MT (30V, 46A @ 100°C, Rds(on): 3.4mOhm) 2x Rectron Semiconductor 3N5R0 (30V, 19.7A @ @ 70°C, Rds(on): 5mOhm) PWM Controller(s): 2x ANPEC APW7073 |
| Filtering Capacitors | Electrolytic: 2x Nippon Chemi-Con @ 105°C, (W), 2x Nippon Chemi-Con (2-5,000 @ 105°C, KZE) 3x Rubycon (2-10,000 @ 105°C, YXF), Polymer: 27x Apaq , 6x Jamicon, 1x Rubycon YXJ |
| Supervisor IC | Weltrend WT7527RA (OVD, PGO, UVD, OCD) |
| Fan Model | Hong Hua HA1225M12F-Z (125mm, 12V, 0.45A, Fluid Dynamic Bearing Fan) |
| 5VSB | |
| High Side Rectifier |
P6SMB (220V , 1A)
|
| Standby PWM Controller | Excelliance MOS EM8564A |
The OEM is Helly Technology, the mother company of 1st Player. The PCB is small but not densely populated with parts. The overall design is clean, without any cables blocking the airflow. The main transformer is surrounded by heatsinks, which cool down the FETs regulating the 12V rail. These FETs are installed on the PCB’s business side. There is nothing important to see on the PCB’s backside since Helly prefers to solder most parts on the other side. On this PCB side, you will only find four shunt resistors.
The soldering quality is satisfactory, and the capacitors that Helly used are of high quality. The FETs don’t belong to tier #1 manufacturers, but they will do the job. The cooling fan is by Hong Hua, which has proven that it can make reliable products. Besides the APFC converter, we find a half-bridge topology and an LLC resonant converter on the unit’s primary side. On the secondary side, a synchronous rectification scheme generates the 12V rail, which feeds a pair of DC-DC converters that generate the minor rails. These converters are installed on vertical boards to occupy less space.
It is good to see a new ATX v3.1 platform by a less popular OEM since it provides more brand choices. So far, CWT had the lion’s share in the ATX v3.0 and v3.1 PSUs with its trendy CSZ platform, but new designs are starting to emerge, trying to share a piece of the market pie. I guess this will push CWT and the rest of the big OEMs to improve their products further, and we will finally start to see price reductions as the competition gets more challenging.
