Secondary Analysis

This power supply has four Schottky rectifiers on its secondary.

The +12 V output is produced by two SBR40U60PT Schottky rectifiers connected in parallel. Since each one supports up to 40 A at 150º C we have a maximum theoretical current for the +12 V output of 80 A or 960 W. Of course the maximum current (and thus power) this line can really deliver will depend on other components, especially the transformer, the coil, the capacitors and the wire gauge used.

The +5 V output is produced by one DF40SC4 Schottky rectifier, which supports up to 40 A at 106º C. So the maximum theoretical power the +5 V output can deliver is of 200 W. Of course the maximum current (and thus power) this line can really deliver will depend on other components, especially the transformer, the coil, the capacitor and the wire gauge used, as we mentioned before.

The +3.3 V output is produced by another DF40SC4 Schottky rectifier, which supports up to 40 A at 106º C. So the maximum theoretical power the +3.3 V output can deliver is of 132 W. As mentioned the real power this line can deliver depends on other factors.

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Figure 13: +3.3 V, +12 V and +5 V rectifiers.

This power supply uses a PS231S monitoring integrated circuit, which is in charge of the power supply protections, like OCP (over current protection). Unfortunately there is no datasheet for this component on the manufacturer’s website, so we couldn’t check what protections it really supports. Analyzing the printed circuit board from the reviewed power supply we could clearly see each +12 V virtual rail connected to this integrated circuit.

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Figure 14: PS231S monitoring integrated circuit.

The thermal sensor is attached to the secondary heatsink and you can see it on Figure 14 (green component). This sensor is used to control the fan speed according to the power supply internal temperature and to shut down the power supply in an overheating situation, if the power supply implements over temperature protection (OTP). Enermax says that PRO82+ 525 W has this protection set at 95º C, bue we couldn't test this as we couldn't put this power supply to run at such high temperature.

This power supply uses only Japanese electrolytic capacitors, with capacitors from Matsushita (Panasonic) on the active PFC circuit (rated at 85º C) and Chemi-Con on the secondary (rated at 105º C).

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