| General Data | |
| Manufacturer (OEM) | no info |
| PCB Type | Single-Sided |
| Primary Side | |
| Transient Filter | 4x Y caps, 2x X caps, 2x CM chokes |
| Inrush Protection | – |
| Bridge Rectifier(s) |
1x GBU1006 (without heat sink) (600V, 10A @ 100°C)
|
| APFC MOSFET |
1x Maplesemi SLF20N50S (500V, 13A @ 100°C, Rds(on): 0.27Ohm)
|
| APFC Boost Diode |
1x Diodes Inc LTTH806RFW (600V, 8A @ 125°C)
|
| Bulk Cap |
1x Ltec (420V, 270uF, 2,000h @ 85°C, LP)
|
| Main Switchers |
2x Maplesemi SLF16N50C (500V, 9.6A @ 100°C, Rds(on): 0.366Ohm)
|
| PFC / PWM Combo Controller | OnSemiconductor FAN4800A |
| Topology |
Primary side: APFC, Double Forward
Secondary side: Semi – Synchronous Rectification, Group regulation for the minor rails |
| Secondary Side | |
| +12V MOSFETs | 2x PSM40U60YCT |
| 5V & 3.3V | 1x Vishay MBR3045CT SBR (45V, 30A) & 1x SBT30V45CT (45V, 40A) |
| Filtering Capacitors | Electrolytic: 3x Jicon (2,000h @ 105°C, ZC), 4x Chengx (2-4,000h @ 105°C, GR), 3x Nicon (2-3,000h @ 105°C, KME) |
| Supervisor IC | XF295M |
| Fan Model | BOK BDH12025S (120mm, 12V, 0.30A, Rifle Bearing Fan) |
| 5VSB Circuit | |
| Standby PWM Controller | Power Integrations TNY286PG |
The PCB is small and loosely populated. The heatsinks are small for the unit’s efficiency, and the only two chokes on the secondary side show that a group regulation design is used for the minor rails. The large choke is shared by 12V/5V, and the tiny one by 3.3V. There is an APFC converter on the primary side, and the minor FETs are installed into a double-forward topology. The bulk cap is by Ltec and is rated at 85°C, while the electrolytic caps used on the secondary side belong to low-grade manufacturers. They are rated at 105°C, at least.
I did find a transient filter lacking a MOV, and there is no inrush current protection in the form of an NTC thermistor. Given the low capacity of the bulk cap, the engineers responsible for this platform thought there was no need for inrush current protection, but the relevant tests will confirm (or not) this. This is a low-cost platform, so don’t expect good parts or top-soldering quality. That said, the soldering quality is decent. I have seen way worse soldering jobs in more expensive PSUs.
The cooling fan is by BOK. I only encountered this brand in some low-end Zalman units, and given my experience so far, I rate it at the low-end section, along with Yate Loon. The cooling fan is supposed to have a rifle bearing, but I can safely assume it is a plain sleeve bearing, upgraded to a rifle on paper only.
In the pro and cons section you mention that it has both high build quality and low build quality. which one is it?
I left an error on purpose to see who would notice 😀
Bad build quality