SilverStone Strider Plus 600 W (ST60F-PS) Power Supply Review

Secondary Analysis

As one would expect in a high-efficiency power supply, the SilverStone Strider Plus 600 W (ST60F-PS) uses a synchronous design, where the Schottky rectifiers are replaced with MOSFETs. Also, the reviewed product uses a DC-DC design in its secondary. This means that the power supply is basically a +12 V unit, with the +5 V and +3.3 V outputs produced by two smaller power supplies connected to the main +12 V rail. Both designs are used to increase efficiency.

The +12 V output uses four IPP023NE7N3 G 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 2.3 mΩ.

Figure 17: The +12 V transistors

As explained, the +5 V and +3.3 V outputs are produced by two DC-DC converters, which are located on a single daughterboard. Both converters are controlled by an APW7159 integrated circuit, and each converter makes use of four IPD060N03L G transistors. Each transistor supports up to 50 A at 100° C in continuous mode and up to 350 A at 25° C in pulse mode, with a maximum RDS(on) of 6 mΩ.

Figure 18: The DC-DC converters

Figure 19: The DC-DC converters

The outputs are monitored by a PS224 integrated circuit, which supports over voltage (OVP), under voltage (UVP), and over current (OCP) protections. There are two +12 V over current protection (OCP) channels, but the manufacturer decided to use only one of them, giving this unit a single +12 V rail.

Figure 20: Monitoring circuit

This power supply uses Taiwanese electrolytic capacitors, from Teapo, labeled at 105° C in its secondary.

Figure 21: Capacitors