Mushkin Volta 600 W Power Supply Review

Secondary Analysis

This power supply has six Schottky rectifiers on its secondary, plus a diode used by the +5VSB output.

The maximum theoretical current each line can deliver is given by the formula I / (1 – D), where D is the duty cycle used and I is the maximum current supported by the rectifying diode. Just as an exercise, we can assume a typical duty cycle of 30%.

The +12 V output is produced by two STPS41H100CT Schottky rectifiers, each one supporting up to 40 A (20 A per internal diode at 150° C, 0.67 V maximum voltage drop), giving us a maximum theoretical current of 57 A or 686 W for the +12 V output.

The +5 V output is produced by two STPS30L45CT Schottky rectifiers, each one supporting up to 30 A (15 A per internal diode at 110° C, 0.50 V maximum voltage drop), giving us a maximum theoretical current of 43 A or 214 W for the +5 V output.

The +3.3 V output is produced by another two STPS30L45CT Schottky rectifiers, giving us a maximum theoretical current of 43 A or 141 W for the +3.3 V output.

All these numbers are theoretical. The real amount of current/power each output can deliver is limited by other components, especially by the coils used on each output.

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

The outputs are monitored by a PS113 integrated circuit, which supports only OVP (over voltage protection) and SCP (short-circuit protection). Any other protection this unit may have is implemented outside this chip.

Figure 14: Monitoring integrated circuit.

One solid capacitor is present on the secondary (filtering the +5VSB output) and the rest of the capacitors are Taiwanese, from Hermei.