Part Analysis
| General Data | |
| Manufacturer (OEM) | Seasonic |
| PCB Type | Double-Sided |
| Primary Side | |
| Transient Filter | 6x Y caps, 2x X caps, 2x CM chokes, 1x MOV |
| Inrush Protection | 2x NTC Thermistor MF72-5D20L (5 Ohm @ 25°C) & Relay |
| Bridge Rectifier(s) |
2x Vishay LVB2560 (600V, 25A @ 105°C)
|
| APFC MODFET |
1x Transphorm TP65H035G4WS GaN (650V, 29A @ 100°C, Rds(on): 41mOhm)
|
| APFC Boost Diode |
1x CREE C6D10065A (650V, 10A @ 155°C)
|
| Bulk Cap(s) | |
| Main Switchers |
4x Infineon IPP60R180P7 (650V, 11A @ 100°C, Rds(on): 0.180Ohm)
|
| APFC Controller | |
| Resonant Controller |
Champion CM6901T2X
|
| Driver IC |
2x Novosense NSi6602
|
| Topology |
Primary side: APFC, Full-Bridge & LLC Resonant converter
Secondary side: Synchronous Rectification & DC-DC converters |
| Secondary Side | |
| +12V MOSFETs | 8x Infineon BSC007N04LS6 (40V, 269A @ 100°C, Rds(on): 0.7mOhm) |
| 5V & 3.3V | DC-DC Converters: 4x Nexperia PSMN4R0-30YLD (30V, 95A @ 25°C, Rds(on): 4mOhm) & 2x Nexperia PSMN3R5-30YL (30V, 100A @ 25°C, Rds(on): 3.5mOhm) PWM Controller(s): Anpec APW7159C |
| Filtering Capacitors | Electrolytic: 5x Rubycon (6-10,000h @105°C, ZLH) 1x Rubycon (3-6,000h @105°C, ZLQ) 3x Nichicon (2-5,000 @ 105°C, HD(M)) Polymer: 34x FPCAP, 5x Nippon Chemi-con |
| Supervisor IC | Weltrend WT7527RA (OVP, UVP, OCP, SCP, PG) |
| MCU | Nuvoton M481LE8AE |
| Flash Memory | Microchip SST26F016B |
| Fan Model | Everflow F1214025BL (135mm, 12V, 0.2A , Double Ball Bearing Fan) |
| 5VSB | |
| Rectifier |
Infineon BSC014N04LS (40V, 145A @ 100°C, Rds(on): 1.4mOhm)
|
| Standby PWM Controller |
Onsemi NCP1342AMDCDAD1R2G
|
Asus wanted MODFETs in its new PSUs for its reasons, but like in the Rog Strix 1200W that I evaluated a while ago, which also uses MODFETs, the one in this PSU is used like a regular FET since Seasonic didn’t use a bridgeless totem-pole APFC converter, which offers minimized energy losses and the highest possible efficiency, but a plain CCM one. Given the standard PFC controller, I believe that using a MODFET in this PSU helps more in marketing than in real-life performance.
The transient filtering stage has all the necessary parts to block incoming and outgoing EMI emissions. Typically, it starts at the AC receptacle and continues on the main PCB.
There is a MOV to protect from voltage surges and two NTC thermistors, with a combined resistance of 10 ohms. Moreover, a bypass relay supports the NTC thermistors.
The two Vishay LVB2560 parallel bridge rectifiers can handle up to 50A together, so they are more than enough to cover this platform’s needs.
The APFC converter uses a single Transphorm TP65H035G4WS GaN and one CREE boost diode. The bulk caps are by Rubycon and offer a combined capacity of 1240uF. They are rated for 3,000 h at 105 °C.
The APFC controller is a Champion CM6502UHHX. It is supported by a Champion CM03X, which reduces vampire power consumption.
The unit’s MCU is a Nuvoton M481LE8AE. It controls what is shown on the OLED screen and is supported by a Microchip SST26F016B.
The four Infineon IPP60R180P7 primary switching FETs are installed in a full-bridge topology, and an LLC resonant converter is used for higher efficiency.
The PSU’s main transformer.
Eight Infineon BSC007N04LS6 FETs regulate the 12V rail. They are installed on the main PCB next to the main transformers to minimize energy losses.
Two DC-DC converters generate the minor rails.
Nichicon and Rubycon provide the electrolytic filtering capacitors. FPCAP and Chemi-Con make the polymer caps.
You can find more information about capacitor performance and other specs below:
The supervisor controller is a Weltrend WT7527RA. The unit’s MCU might also handle some of the available protection features.
The standby PWM controller is an NCP1342, and the secondary side rectifier is an Infineon BSC014N04LS.
Several polymer and electrolytic caps at the face of the modular panel form an extra ripple-filtering layer.
The soldering quality is not good. I hope that the normal production units have better soldering quality.
The cooling fan is an Everflow F1214025BL, using a double ball bearing.
So it is not such a great psu.. prime psu are better from what I can understand.
I thought it was a prime platform..
I thought they were produced by other OEMs, not by Seasonic. Will you have the chance to test the top of the line Asus Rog Thor III 1600W Titanium as well? Thank you.
I am not sure if Asus will send the 1600W model for a spin.