Part Analysis
| General Data | |
| Manufacturer (OEM) | HKC |
| PCB Type | Double-Sided |
| Primary Side | |
| Transient Filter | 4x Y caps, 2x X caps, 3x CM chokes, 1x MOV |
| Inrush Protection | NTC Thermistor & Relay |
| Bridge Rectifier(s) |
2x GBU25KH (800V, 25A @ 90°C)
|
| APFC MOSFETs |
2x Lonten LSB65R070GF (650V, 30A @ 100°C, Rds(on): 0.07Ohm) &
CM03AX (reduce the no-load consumption) |
| APFC Boost Diode |
1x CH3D16065I
|
| Bulk Cap(s) |
2x Nippon Chemi-Con (400V, 590uF & 390uF each or 980uF combined, 2,000h @ 105°C, KHE)
|
| Main Switchers |
2x Wayon WMK53N65F2 (650V, 26A @ 100°C, Rds(on): 0.078Ohm)
|
| APFC Controller |
Champion CM6502UHHX
|
| Resonant Controller | Champion CM6901X |
| Topology |
Primary side: APFC, Half-Bridge & LLC converter
Secondary side: Synchronous Rectification & DC-DC converters |
| Secondary Side | |
| +12V MOSFETs | 8x Infineon ISC012N04LM6 (40V, 168A @ 100°C, Rds(on): 1.2mOhm) |
| 5V & 3.3V | DC-DC Converters: 4x Infineon Infineon ISC012N04LM6 (40V, 168A @ 100°C, Rds(on): 1.2mOhm) PWM Controller(s): ANPEC APW7159C |
| Isolated Gate Driver | Novosense NSi6602 |
| Filtering Capacitors | Electrolytic: 1x Nichicon (2-4,000h @ 105°C, HD), 1x Nippon Chemi-Con (5-6,000h @ 105°C, KZH) 2x Nippon Chemi-Con (4-10,000h @ 105°C, KY), 1x Nippon Chemi-Con (4-10,000h @ 105°C, KYA), 1x Rubycon (2-10,000h @ 105°C, YXF)Polymer: 11x Nippon Chemi-Con, 16x NIC |
| Supervisor IC | INFSitronix IN1S429I (OCP, OVP, UVP, SCP, PG) |
| Fan Model | Thermaltake (Hong Hua) HA1215H12SF-Z (120mm, 12V, 0.55A, Fluid Dynamic Bearing Fan) |
| 5VSB Circuit | |
| Rectifiers |
Infineon ICE5QR1680AG FET (800V, 5.8A, Rds(on): 1.75Ohm) &
Meraki-IC MK91736 FET |
| Standby PWM Controller | Infineon ICE5QR1680AG |
There is considerable debate about whether HKC or another OEM makes this unit. TT informed me that it is HKC for all Toughpower SFX models, but the smaller ones are identical to Gospower SFX models. This means that I will take TT’s word for this. Nonetheless, here is its complete part analysis, which is more important.
We have a half-bridge topology and an LLC resonant converter on the primary side. The secondary side employs a synchronous design for rectifying the 12V rail and a pair of DC-DC converters for the minor rails.
The primary heatsink is large, and there are no heatsinks on the secondary side since all 12V FETs are installed on the solder side of the PCB. The soldering quality is generally good, but I don’t like the PCB’s finish so much. Moreover, quality parts are used in most circuits, but I am not sure about the quality of the FETs on the primary side. I would prefer to see Infineon FETs used there, too.
