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Teardown & Component Analysis
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| General Data | |
|---|---|
| Manufacturer (OEM) | RSY (Super Flower design) |
| Primary Side | |
| Transient Filter | 4x Y caps, 4x X caps, 2x CM chokes, 1x MOV (10D561K) |
| Inrush Protection | NTC thermistor & relay |
| Bridge Rectifier(s) | 1x GBU806 (600V, 10A @ 100°C) |
| APFC MOSFETs | 2x Infineon IPA50R280CE (550V, 11.4A @ 100°C, 0.28Ω) |
| APFC Boost Diode | 1x STMicroelectronics STTH8R06D (600V, 8A @ 130°C) |
| Hold-up Cap(s) | 1x Teapo (400V, 270uF, 2000h @ 105°C, LW) |
| Main Switchers | 2x Infineon IPA50R280CE (550V, 11.4A @ 100°C, 0.28Ω) |
| Combo APFC/PWM Controller | ON Semiconductor FAN4800C & CM03X Green PFC controller |
| Topology | Primary side: Double-forward Secondary side: Passive rectification & group regulation design |
| Secondary Side | |
| +12V MOSFETs | 2x Mospec S30M60C SBR (60V, 30A) |
| 5V & 3.3V | 2x Mospec S30M45C SBR (45V, 30A) |
| Filtering Capacitors | Electrolytics: Teapo (1-3,000 @ 105°C, SC) |
| Supervisor IC | Grenergy GR8323N (OVP, UVP, OCP, SCP, PG) |
| Fan Model | Globe Fan S1202512L (120mm, 12V, 0.18A, 50 CFM, 34 dB[A], 2000 RPM, sleeve bearing) |
| 5VSB Circuit | |
| Rectifier | 1x Mospec S30M60C SBR (60V, 30A) |
| Standby PWM Controller | Excelliance EM8564A |
This is an outdated Super Flower platform manufactured by RSY. We find a double-forward design on the primary side, while passive rectification and a group regulated scheme are utilized on the secondary side, tying the +12V and 5V rails together. The 3.3V rail is rectified by an independent circuit. EVGA keeps the maximum combined power of its minor rails low, enabling acceptable performance under cross-load scenarios, where the loads between rails are highly imbalanced.
It is good to see Infineon FETs in such a budget-oriented PSU. Moreover, the filtering caps are provided by Teapo, one of the best alternatives when Japanese capacitors are out of reach. We also appreciate the bypass relay that supports the NTC thermistor. However, that thermistor should be a bit larger to more effectively protect against large inrush currents.
We noticed that the MOV is rated too generously. It allows up to 925VAC to pass freely, while the bridge rectifier can handle 600V tops. An MOV with a lower clamping voltage should have been used instead.
These photos illustrate the PSU's major parts, while the following video shows its internals.
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