Part Analysis
| General Data | |
| Manufacturer (OEM) | HKC |
| PCB Type | Double-Sided |
| Primary Side | |
| Transient Filter | 4x Y caps, 2x X caps, 2x CM chokes, 1x MOV |
| Inrush Protection | 1x NTC Thermistor 5D-15 (5 Ohm @ 25°C) & Relay |
| Bridge Rectifier(s) |
2x GB1006U (600V, 10A @ 120°C)
|
| APFC MOSFETs |
2x WayOn WML36N60F2 (650V, 20A @ 100°C, Rds(on): 0.11Ohm)
|
| APFC Boost Diode |
1x P3D0601012
|
| Bulk Cap(s) |
2x Rubycon (420V, 390uF each or 780uF combined, 3000h @ 105°C, MXK)
|
| Main Switchers |
4x Ncepower NCE65TF130F (650V, 18A @ 100°C, Rds(on): 0.13Ohm)
|
| APFC Controller |
Champion CH6502UHHX
|
| Resonant Controller | Champion CU6901VPA |
| Topology |
Primary side: APFC, Full-Bridge & LLC converter
Secondary side: Synchronous Rectification & DC-DC converters |
| Secondary Side | |
| +12V MOSFETs | 8x |
| 5V & 3.3V | DC-DC Converters: 2x PWM Controller(s): ANPEC APW7159C |
| Filtering Capacitors | Electrolytic: 5x Nippon Chemi-Con (2-5,000 @ 105°C, KZE), 2x Nippon Chemi-Con (4-10,000 @ 105°C, KYA) Polymer: 35x no info |
| Supervisor IC | Weltrend WT7527RA |
| Fan Model | TT-1225 BDK12025MS (120mm, 12V, 0.30A, Fluid Dynamic Bearing Fan) |
| 5VSB Circuit | |
| Rectifier |
PJ1256
|
| Standby PWM Controller | PN8141 |
Similar to the other models of the PF3 family, made by HKC, heatsinks are pretty large, helping the fan speed profile to be more relaxed without jeopardizing the PSU’s reliability. The space between parts is restricted, especially on the secondary side, affecting airflow. Some caps on the secondary side are hidden below the 12V heatsink, so they don’t have a clear path to the fan’s airflow, but they are polymers that are more tolerant to high temperatures.
The build quality is good. HKC used quality capacitors everywhere, including the secondary side where stress is higher. The soldering quality is good, but the PCB’s coating is not the best I have seen by HKC. The cooling fan is by BaoDiKai, and its model number is BDK12025MS. It is supposed to use a fluid dynamic bearing, but I cannot be sure unless I destroy the fan to inspect its bearing. I would highly prefer a Hong Hua fan, but apparently, HKC doesn’t have close relations with this factory, so they either cannot get Hong Hua’s products or the prices are too high.
A full-bridge topology and an LLC resonant converter are used on the primary side. A synchronous rectification scheme is utilized on the secondary side for the 12V rail, along with a pair of DC-DC converters for the minor rails. Eight FETs are used for the 12V rail, which I couldn’t identify without major desoldering. On the primary side, HKC went with Ncepower FETs, which are not at the same quality level as the corresponding Infineon ones.
