SilverStone Strider Plus 500 W Power Supply Review

Secondary Analysis

The SilverStone Strider Plus 500 W has six Schottky rectifiers attached to the secondary heatsink.

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. As an exercise, we can assume a duty cycle of 30 percent.

The +12 V output uses two SBR30A50CT Schottky rectifiers (30 A, 15 A per internal diode at 110° C, 0.55 V maximum voltage drop), giving us a maximum theoretical current of 43 A or 514 W for this output.

The +5 V output uses two PFR30L45CT Schottky rectifiers (30 A, 15 A per internal diode at 120° C, 0.52 V maximum voltage drop), giving us a maximum theoretical current of 43 A or 214 W for this output.

The +3.3 V output uses another two PFR30L45CT Schottky rectifiers, giving us a maximum theoretical current of 43 A or 141 W for this output.

Figure 14: The +5 V, +12 V, and +3.3 V rectifiers

This power supply uses a WT7527 monitoring integrated circuit. This integrated circuit supports over voltage (OVP), under voltage (UVP), and over current (OCP) protections, supporting two +12 V rails. The manufacturer, however, opted to use only one of the two +12 V over current protection circuits, making this unit a single +12 V rail product.

Figure 15: Monitoring circuit

The electrolytic capacitors available in the secondary are from OST and Teapo, labeled at 105° C.