Part Analysis
| General Data | |
| Manufacturer (OEM) | LiteOn |
| PCB Type | Single-Sided |
| Primary Side | |
| Transient Filter | 6x Y caps, 2x X caps, 2x CM chokes, 1x MOV |
| Inrush Protection | 2x NTC Thermistor & Relay |
| Bridge Rectifier(s) |
2x GBJ25V08 (800V, 25A @ with heatsink)
|
| APFC MOSFETs |
2x Infineon IPA60R060P7 (650V, 30A @ 100°C, Rds(on): 0.06Ohm)
|
| APFC Boost Diode |
2x WNSC5D (650V, 10A @ 125°C)
|
| Bulk Cap(s) |
2x TK (450V, 560uF each or 1120uF combined, 3000h @ 105°C, LGWA)
|
| Main Switchers |
2x Infineon IPA60R099P7 (600V, 20A @ 100°C, Rds(on): 0.099Ohm)
|
| APFC Controller |
LTA2021T
|
| Resonant Controller | LTA2021T |
| Topology |
Primary side: APFC, Half-Bridge & LLC converter
Secondary side: Synchronous Rectification & DC-DC converters |
| Secondary Side | |
| +12V MOSFETs | 6x DN4105 |
| 5V & 3.3V | DC-DC Converters: 2x |
| Filtering Capacitors | Electrolytic: 9x TK capacitor (105°C, LWY) Polymer: 29x |
| Synchronous Rectifier IC | MP6924 |
| Supervisor IC | Weltrend WT7527RT (OCP, OVP, SCP, PG) |
| Fan Model | Hong Hua (HA13525H12F-Z) (135mm, 12V, 0.5A, Fluid Dynamic Bearing Fan) |
| 5VSB Circuit | |
| Standby PWM Controller | Excelliance MOS EM8569D |
The purple heatsinks are eye-catching; I suspect they are made in-house since CM is in the heatsink manufacturing business. The platform’s design is nice, and despite the PSU’s high capacity and the normal dimension PCB, there is still plenty of space among parts for good airflow. The main transformer looks like the ones used in 750W and 850W units, but thanks to its design, it can deliver way more power without issues. On the primary side, besides the APFC converter, two FETs, arranged in a half-bridge topology, chop the incoming signal to feed the main transformer, which provides power to the secondary side. An LLC resonant converter is also used to minimize switching losses. Six FETs handle the 12V rail on the secondary side, and two DC-DC converters generate the minor rails.
The soldering quality is impeccable, and the FETs that Lite-On used are of high quality, especially on the primary side. I cannot say the same for the TK (Toshin Kogyo Co., Ltd) caps, which might be Japanese on paper but are not up to the other Japanese manufacturers’ quality (e.g., Chemi-Con and Rubycon). Besides electrolytic caps, many polymer ones handle ripple filtering on the secondary side.
CM preferred the typical solution for the cooling fan, a Hong Hua fan. So far, this brand proved to be a reliable source of fans without breaking the bank, earning the trust of many manufacturers and brands.
