Part Analysis
| General Data | |
| Manufacturer (OEM) | Seasonic |
| PCB Type | Double-Sided |
| Primary Side | |
| Transient Filter | 6x Y caps, 3x X caps, 2x CM chokes, 1x MOV |
| Inrush Protection | 2x NTC Thermistor MF72-20D20M (20 Ohm) & Relay |
| Rectifier FETs |
4x IPB60R040C7 600V ,1x LL25XB60 25A 600V
|
| APFC MOSFETs |
4x Infineon IPA60R099P6 (600V, 24A @ 100°C, Rds(on): 0.099Ohm)
|
| APFC Boost Diode |
2x CREE C6D10065A (650V, 10A @ 155°C)
|
| Bulk Cap(s) |
3x Nippon Chemi-Con (420V, 820uF each or 2460uF combined, 2,000h @ 105°C, KHE)
|
| Main Switchers |
4x Infineon IPA60R080P7 (600V, 23A @ 100°C, Rds(on): 0.08Ohm)
|
| Drivers IC | 2x Silicon Labs Si8233BD |
| APFC Controller | Texas Instruments UCD28070 |
| Resonant Controller | Champion CM6901T2X |
| Topology |
Primary side: Bridgeless, Interleaved PFC, Full-Bridge & LLC converter
Secondary side: Synchronous Rectification & DC-DC converters |
| Secondary Side | |
| +12V MOSFETs | 16x Nexperia PSMN1R0-40YLD (40V, 198A @ 100°C, Rds(on): 1.93mOhm) |
| 5V & 3.3V | DC-DC Converters |
| Filtering Capacitors | Electrolytic: 5x Nippon Chemi-Con (105°C, W), 1x Nippon Chemi-Con (5-6,000h @ 105°C, KZH), 1x Nippon Chemi-Con (2-5,000h @ 105°C, KZE), 3x Rubycon (6-10,000h @ 105°C, ZLH), 1x Rubycon (3-6,000h @ 105°C, YXG) Polymer: 28x Nippon Chemi-Con, 2x FPCAP, 8x Evercon |
| Supervisor IC | Weltrend WT7527RA (OCP, OVP, UVP, SCP, PG) |
| Fan Controller | Nuvoton M031 |
| Fan Model | Noctua NF-A12x25 (120mm, 12V, 0.14A, Hydraulic Bearing Fan) |
| 5VSB Circuit | |
| Rectifier |
1x Infineon BSC100N06LS3 FET (60V, 36A @ 100°C, Rds(on): 10mOhm)
|
| Standby PWM Controller | Power Integrations INN3164C |
No changes were made to the main PCB compared to the “plain” TX-1600. Only the fan and the top cover are different. Despite the huge PCB, the platform is densely populated. Moreover, I usually don’t find large heatsinks in modern PSUs. Although Titanium efficiency allows for low thermal loads, Seasonic used large heatsinks to make the fan’s noise as low as possible. A bridgeless, interleaved PFC is used to achieve high efficiency, along with a full-bridge topology and an LLC resonant converter.
The 12V rail is generated through 16x powerful Nexperia FETs. The same rail also feeds a pair of DC-DC converters, which generate the minor rails. Fully desoldering this platform makes it easier to identify all its parts, but I didn’t want to do that since I need it to remain fully operational for future testing.
The build quality is top, and the same goes for the soldering quality. Seasonic used Japanese caps everywhere, both electrolytic and polymer, and the bulk caps have a vast combined capacity, close to 2500uF! Because of the large bulk caps and their combined capacity, not one but two NTC thermistors had to be used, with 20 Ohm resistance each! Despite the large PCB, space is still an issue, so both are installed onto a vertical board.
The cooling fan is by Noctua, a high-speed version of the NF-A12x25, which is not commercially available. You can find the full review of this fan here:
Thank you for the through review. Did you test for EMF? I don’t recall seeing it in the review.
EMI? Nope.
it’s up there with the 1kW (or more) passive PSU on the: impressive feat, but what for? list
with such a high load components you use absolutely will make tons of noise, even the beast won’t be able to handle them, so… it’s beyond flagship, it’s just a showoff
unless some users use custom water cooling with silent fans and huge radiators.