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 |
| Inrush Protection | 1x NTC Thermistor MF72 5D-20L (5 ohm) & Relay |
| Bridge Rectifier(s) |
2x GBU1508 (800V, 15A @ 40°C)
|
| APFC MOSFETs |
2x Alpha & Omega AOB190A60CL (600V, 12A @ 100°C, Rds(on): 0.19Ohm)
|
| APFC Boost Diode |
1x Infineon IDK08G65C5 (650V, 8A @ 145°C)
|
| Bulk Cap(s) |
1x Nichicon (400V, 560uF, 2,000h @ 105°C, GG(M))
|
| Main Switchers |
4x Great Power GPT130N50X (500V, 4.5A @ 25°C, Rds(on): 1.55Ohm)
|
| Resonant Controller |
Champion CU6901VPA
|
| APFC Controller |
Champion CM6500UNX
|
| Topology |
Primary side: APFC, Full-Bridge & LLC converter
Secondary side: Synchronous Rectification & DC-DC converters |
| Secondary Side | |
| +12V MOSFETs | 4x Nexperia PSMN1R4-40YLD (40V, 214A @ 100°C, Rds(on): 1.4mOhm) |
| 5V & 3.3V | DC-DC Converters: 6x Nexperia PSMN4R0_30YLD (30V, 95A @ 100°C, Rds(on): 4mOhm) 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) 2x Rubycon (6-10,000h @ 105°C, ZLH) Polymer: 7x Nippon Chemi-Con, 16x FPCAP |
| 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 | |
| Rectifier |
DK DK5V45R10S (45v, 10mOhm)
|
| Standby PWM Controller |
Excelliance MOS EM8569C
|
Despite the small PCB, plenty of space is available, and the distance between parts is large to allow for enhanced airflow. The large vertical PCBs on the sides allow for an uncrowded PCB. One holds the APFC converter and the main FETs, while the other daughterboard holds both DC-DC converters that generate the minor rails. Seasonic used surface-mounting FETs with tiny heatsinks since the PCB also cools them. This is an interesting design to have a vertical board holding a significant part of the PSU’s primary side. Speaking of the primary side, a full-bridge topology is used for enhanced reliability and increased efficiency. On the secondary side, the 12V FETs are installed on the top PCB side, so they come in direct contact with the fan’s airflow.
Overall, the soldering quality is good, and all the parts that Seasonic used are of high quality, including Nichicon, Rubycon, Chemi-Con, and FPCAP capacitors, along with Alpha & Omega and Nexperia FETs. Moreover, the cooling fan is by Hong Hua, which has been among the most popular fan manufacturers in the PSU market in recent years, and for good reason.
The fan is digitally controlled by an MCU, which is optimal, but you still have to program it accordingly to have a good fan speed profile. Moreover, I would like to see MCUs controlling other parts of the PSU as well.
Any news about the 750w protection features?
I think you were right and a lot of people who read your review are wondering if the retail 750w model should be considered when making a purchase.
Thanks a lot for all the amazing work.
Would you consider testing the Super Flower Zillion FG ATX3.1/PCIe 5.0 power supplies? I’ve recently stumbled across them as they are currently on sale and was wondering if they were good.
Aris you should review the SuperFlower Leadex III ATX3.0