FSP Aurum 92+ 650 W Power Supply Review
Secondary Analysis
Contents
As one would expect in a high-efficiency power supply, the FSP Aurum 92+ 650 W uses a synchronous design.
The +12 V output uses two IPP020N06N MOSFETs, each one supporting up to 120 A at 100° C in continuous mode, or up to 480 A at 25° C in pulse mode, with a maximum RDS(on) of only 2 mΩ.
Figure 16: The +12 V transistors
The +5 V output uses two IPD031N03L G MOSFETs, each one supporting up to 90 A at 100° C in continuous mode, or up to 400 A at 25° C in pulse mode, with a maximum RDS(on) of only 3.1 mΩ. These transistors are located on the solder side of the printed circuit board, using the power supply case as a heatsink. They are controlled by another custom integrated circuit, an FSP6601.
The +3.3 V output uses the same configuration as the +5 V output, as described above.
Figure 17: The +5 V and +3.3 V transistors
Figure 18: The synchronous controller
The outputs of this power supply are monitored by a WT7579 integrated circuit. This chip supports over voltage (OVP), under voltage (UVP), over current (OCP), and over temperature (OTP) protections. There are four +12 V over current protection channels, correctly matching the number of +12 V rails advertised by the manufacturer.
Figure 19: Monitoring circuit
The electrolytic capacitors from the secondary are also from Chemi-Con, and labeled at 105° C, as usual.
Figure 20: Capacitors
