Antec Earthwatts Gold Pro 750W PSU Review

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Teardown & Component Analysis

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General Data
Manufacturer (OEM)Seasonic
Platform ModelFocus Gold
Primary Side
Transient Filter4x Y caps, 2x X caps, 2x CM chokes, 1x MOV, 1x CM02X
Inrush ProtectionNTC Thermistor & Diode
Bridge Rectifier(s)2x GBU1506 (600V, 15A @ 100°C)
APFC MOSFETs2x Infineon IPA50R190CE (550V, 15.7A @ 100°C, 0.19Ω)
APFC Boost Diode1x STMicroelectronics STTH8S06D (600V, 8A @ 125°C)
Hold-up Cap(s)1x Hitachi (400V, 390uF, 2000h @ 105°C, HU)
Main Switchers4x STMicroelectronics STP10NK60ZFP (600V, 5.7A @ 100°C, 0.75Ω)
APFC ControllerChampion CM6500UNX
Resonant ControllerChampion CM6901T6X
TopologyPrimary side: Full-Bridge & LLC Resonant Controller Secondary side: Synchronous Rectification & DC-DC converters
Secondary Side
+12V MOSFETs4x Nexperia PSMN2R6-40YS (40V, 100A @ 25°C, 2.8mΩ)
5V & 3.3VDC-DC Converters: 4x Ubiq QM3004D (30V, 40A @ 100°C, 8.5mΩ) PWM Controller: 2X
Filtering CapacitorsElectrolytics: 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 ICWeltrend WT7527V (OVP, UVP, OCP, SCP, PG)
Fan ModelHong Hua HA1225H12F-Z (120mm, 12V, 0.58A, 2200 RPM, Fluid Dynamic Bearing)
5VSB Circuit
Standby PWM ControllerExcelliance EM8569
Rectifier1x 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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Contributing Editor

Aris Mpitziopoulos is a Contributing Editor at Tom's Hardware US, covering PSUs.