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.
|Platform Model||Focus Gold|
|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|
|+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)|
|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.
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