Why you can trust Tom's Hardware Our expert reviewers spend hours testing and comparing products and services so you can choose the best for you. Find out more about how we test.
Teardown & Component Analysis
Before proceeding with this page we strongly encourage you to a look at our PSUs 101 article, which provides valuable information about PSUs and their operation, allowing you to better understand the components we're about to discuss.
| General Data | |
|---|---|
| Manufacturer (OEM) | Seasonic |
| Platform Model | Focus Gold |
| Primary Side | |
| Transient Filter | 4x Y caps, 2x X caps, 2x CM chokes, 1x MOV, 1x CM02X |
| Inrush Protection | NTC Thermistor & Diode |
| Bridge Rectifier(s) | 2x GBU1506 (600V, 15A @ 100°C) |
| APFC MOSFETs | 2x Infineon IPA50R190CE (550V, 15.7A @ 100°C, 0.19Ω) |
| APFC Boost Diode | 1x STMicroelectronics STTH8S06D (600V, 8A @ 125°C) |
| Hold-up Cap(s) | 1x Hitachi (400V, 390uF, 2000h @ 105°C, HU) |
| Main Switchers | 4x STMicroelectronics STP10NK60ZFP (600V, 5.7A @ 100°C, 0.75Ω) |
| APFC Controller | Champion CM6500UNX |
| Resonant Controller | Champion CM6901T6X |
| Topology | Primary side: Full-Bridge & LLC Resonant Controller Secondary side: Synchronous Rectification & DC-DC converters |
| Secondary Side | |
| +12V MOSFETs | 4x Nexperia PSMN2R6-40YS (40V, 100A @ 25°C, 2.8mΩ) |
| 5V & 3.3V | DC-DC Converters: 4x Ubiq QM3004D (30V, 40A @ 100°C, 8.5mΩ) PWM Controller: 2X |
| Filtering Capacitors | Electrolytics: Chemi-Con (1-5000 @ 105°C, KZE), Chemi-Con (4-10,000 @ 105°C, KY), Chemi-Con (W, 105°C) Polymers: Chemi-Con, 4x FPCAP (modular PCB) |
| Supervisor IC | Weltrend WT7527V (OVP, UVP, OCP, SCP, PG) |
| Fan Model | Hong Hua HA1225H12F-Z (120mm, 12V, 0.58A, 2200 RPM, Fluid Dynamic Bearing) |
| 5VSB Circuit | |
| Standby PWM Controller | Excelliance EM8569 |
| Rectifier | 1x P10V45SP SBR (45V, 10A) |
Again, this PSU is based on Seasonic's Focus Gold platform, which is a more affordable version of the Focus Plus Gold. The main differences between them are the different PFC and primary switching FETs, along with a smaller bulk cap that the Focus Gold uses (at least that's the case for Antec's EA750G Pro, based on the similar-capacity Focus Gold unit's platform).
A full bridge topology is used on the primary side, along with an LLC resonant converter for increased efficiency. On the secondary side, we meet a synchronous rectification scheme where FETs regulate the +12V rail and the minor rails are generated through a couple of DC-DC converters. Finally, all filtering caps are provided by Japanese manufacturers. Besides the electrolytic caps, we also find a large number of polymer ones.
The following video shows the EA750G Pro’s internals.
MORE: Best Power Supplies
MORE: How We Test Power Supplies
MORE: All Power Supply Content
