Part Analysis
| General Data | |
| Manufacturer (OEM) | Seasonic |
| PCB Type | Double-Sided |
| Primary Side | |
| Transient Filter | 4x Y caps, 2x X caps, 2x CM chokes, 1x MOV, 1x CM02X (Discharge IC) |
| Inrush Protection | 1x NTC Thermistor MF72-5D20L (5 Ohm) & Relay |
| Bridge Rectifier(s) |
2x
|
| APFC MOSFETs |
2x Toshiba TK31E60W (600V, 30.8A, Rds(on): 0.088Ohm)
|
| APFC Boost Diode |
1x Cree C6D10065 (650V, 10A @ 155°C)
|
| Bulk Cap(s) | |
| Main Switchers |
4x Infineon IPA60R120P7 (600V, 16A @ 100°C, Rds(on): 0.12Ohm)
|
| APFC Controller | Champion CM6500UNX |
| Resonant Controller | Champion CU6901VPA |
| Topology |
Primary side: APFC, Full-Bridge & LLC converter
Secondary side: Synchronous Rectification & DC-DC converters |
| Secondary Side | |
| +12V MOSFETs | 8x Nexperia PSMN1R0-40YLD (40V, 198A @ 100°C, Rds(on): 1.93mOhm) |
| 5V & 3.3V | DC-DC Converters: 6x Nexperia PSMN4R0-30YLD (30V, 67A @ 100°C, Rds(on): 6.6mOhm) PWM Controller(s): ANPEC APW7159C |
| Filtering Capacitors | Electrolytic: 3x Nichicon (2-5,000h @ 105°C, HD), 1x Nippon Chemi-Con (1-5,000h @ 105°C, KZE), 5x Rubycon (3-6,000h @ 105°C, YXG) 8x Rubycon (6-10,000h @ 105°C, ZLH)Polymer: 6x Nippon Chemi-Con, 22x FPCAP, 9x NIC |
| Supervisor IC | Weltrend WT7527RA (OVP, UVP, OCP, SCP, PG) |
| Fan Controller | Nuvoton M031FB0AE |
| Fan Model | Hong Hua HA13525H12F-Z (135mm, 12V, 0.50A, Fluid Dynamic Bearing Fan) |
| 5VSB Circuit | |
| Standby PWM Controller | Excelliance MOS EM8569C |
Of course, Seasonic is the OEM, and the platform’s design is contemporary. It has a full-bridge topology on the primary side and an LLC resonant converter for lossless switching and increased efficiency. Eight Nexperia FETs regulate the 12V rail on the secondary side, with the same rail powering a pair of DC-DC converters, which generate the minor rails. The PCB is not densely populated, leaving enough space between parts for good airflow. The heatsinks on the primary side are relatively small, as in most high-efficiency PSUs, and tiny on the secondary side.
There aren’t any components on the PCB’s solder side since all of them are installed on the other side, including the 12V FETs. Seasonic used quality parts in this platform, including Toshiba, Infineon and Nexperia FETs, Chemi-Con and Rybycon caps, and a Hong Hua fan featuring a fluid dynamic bearing. Seasonic installed many polymer and electrolytic caps on the modular board to improve ripple suppression and transient response. It is always good to see increased capacity on the secondary side because it plays a crucial role in transient response, which is what the PSU will have to deal with in real-life scenarios where the loads are not steady but constantly change.
I was also waiting for this source, but on Aris’s advice I chose the superflower leadex vii 1200 platinum and I am very happy, better price and better performance, you couldn’t ask for more, in this case Seasonic has not released an excellent product like others times