SilverStone SX650-G PSU Review: Lots Of Power In A Small Form Factor

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)High Power
Platform Model-
Primary Side
Transient Filter4x Y caps, 2x X caps, 3x CM chokes, 1x MOV, 1x CMD02X
Inrush ProtectionNTC thermistor & diode
Bridge Rectifier(s)2x GBU1506L (600V, 15A @ 100°C)
APFC MOSFETs2x Toshiba TK16A60W (600V, 15.8A @ 150°C, 0.19Ω)
APFC Boost Diode1x Power Integrations D0665C5 (600V, 8A @ 150°C)
Hold-up Cap(s)1x Rubycon (420V, 470uF, 3000h @ 85°C, USH)
Main Switchers2x Toshiba TK16A60W (600V, 15.8A @ 150°C, 0.19Ω)
High-side/Low-Side DriverSilicon Labs Si8233BD
APFC ControllerInfineon ICE3PCS01G
Resonant ControllerChampion CM6901X
TopologyPrimary side: Half-bridge & LLC resonant controller
Secondary side: Synchronous rectification & DC-DC converters
Secondary Side
+12V MOSFETs6x Toshiba TPHR85 04PL (SOP Advance Series, 40V, 150A @ 25C, 0.85mΩ)
5V & 3.3VDC-DC Converters: 6x Infineon BSC0906NS (30V, 40A @ 100°C, 4.5mΩ)
PWM Controller: APW7159C
Filtering CapacitorsElectrolytics: Nippon Chemi-Con (1-5000 @ 105°C, KZE), Nippon Chemi-Con (4-10,000 @ 105°C, KY) Polymers: Nippon Chemi-Con
Supervisor ICSITI PS224 (OVP, UVP, OCP,SCP, PG)
Micro ControllerSTC 15W408AS
Fan ModelGlobe Fan S0921512HB (92mm, 12V, 0.45A, fluid dynamic bearing)
5VSB Circuit
Rectifier1x P10V45 SBR (45V, 10A)
Standby PWM ControllerSanken STR-A6069H
-12V Circuit
RectifierKEC KIA7912PI (-12V, 1A)

The SX650-G is manufactured by High Power, and it employs a similar platform as the one found in SilverStone's SX500-G. We find a half-bridge topology and an LLC resonant converter on the primary side. On the secondary side, six FETs regulate the +12V rail and a couple of DC-DC converters generate the minor rails.

Beyond the typical circuitry we expect to find in a PSU, there's also an 8-bit micro-controller (STC 15W408AS) that's probably utilized by the fan control circuit. Or, it may assist the PSU's supervisor IC.

The cooling fan SilverStone uses is more capable than the one in its SX500-G, since the higher-capacity model gets hotter. A fluid dynamic bearing is common in enthusiast-oriented PSUs nowadays.

The album above includes photos illustrating the SX650-G's major parts, while the following video shows the SX650-G’s internals.

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