Teardown & Component Analysis
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|Platform Model||GPS (Modified)|
|Transient Filter||4x Y caps, 2x X caps, 2x CM chokes, 1x MOV, 1x CAP004DG|
|Inrush Protection||NTC thermistor & relay|
|Bridge Rectifier(s)||1x GBU606 (600V, 6A @ 100°C)|
|APFC MOSFETs||2x Champion GP18S50G (500V, 28A @ 150°C, 0.19Ω)|
|APFC Boost Diode||1x STMicroelectronics STTH8R06FP (600V, 8A @ 130°C)|
|Hold-up Cap(s)||1x Nipon Chemi-Con (400V, 390uF, 2000h @ 105°C, KMR series)|
|Main Switchers||2x F-Cell SVF13N50F (500V, 10A @ 100°C, 0.52Ω)|
|APFC Controller||Champion CM6502S & CM03X Green PFC controller|
|LLC Resonant Controller||Champion CM6901|
|Topology||Primary side: Half-bridge & LLC resonant converter Secondary side: Synchronous rectification & DC-DC converters|
|+12V MOSFETs||4x International Rectifier IRFH7004TRPBF (40 V, 164 A @ 100°C, 1.4Ω)|
|5V & 3.3V||DC-DC Converters: 2x UBIQ QM3006D FETs (30 V, 57 A @ 100°C, 5.5Ω) 2x UBIQ QM3004D FETs (30 V, 40 A @ 100°C, 8.5Ω) PWM Controller: ANPEC APW7159C|
|Filtering Capacitors||Electrolytics: Chemi-Con (105°C, KY series, KZE series) Polymers: FPCAP (Japan)|
|Supervisor IC||Sytronix ST9S429-PG14 (OCP [2x 12V channels, OVP, UVP, PG), Weltrend WD7518D (OCP [2x 12V channels], SCP) & UTC LM393G|
|Fan Model||Martech DF1202512SEMN (120mm, 12V, 0.16A, 1630 RPM, rifle bearing)|
|Standby PWM Controller||TinySwitch-LT TNY177PN (18W Peak)|
The BF450G uses a modified version of CWT's GPS platform that improves upon its performance. A half-bridge topology is utilized on the primary side, along with an LLC resonant converter. On the secondary side we find a synchronous design and a couple of DC-DC converters for the minor rails.
High-quality filtering capacitors are joined by a similarly capable bulk cap. Moreover, there are two supervisor ICs (since this PSU has three +12V rails).
According to Martech, the cooling fan's manufacturer, its DF1202512SEMN utilizes a rifle bearing. Unfortunately, we don't know enough about Martech fans to speculate about their reliability over time. BitFenix has faith in the company though, otherwise it wouldn't cover its Formula Gold models with a five-year warranty.
The following video shows the BF450G’s internals:
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