PC Power & Cooling Silencer Mk III 600 W Power Supply Review
Secondary Analysis
Contents
The PC Power & Cooling Silencer Mk III 600 W uses a regular design in its secondary, with Schottky rectifiers.
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 three SBR30A50CT Schottky rectifiers (30 A, 15 A per internal diode at 110° C, 0.55 V maximum voltage drop), which gives us a maximum theoretical current of 64 A or 771 W for this output.
The +5 V output uses one SBR40U45CT Schottky rectifier (40 A, 20 A per internal diode at 110° C, 0.52 V maximum voltage drop), which gives us a maximum theoretical current of 29 A or 143 W for this output.
The +3.3 V output uses one MBR30H30CTG Schottky rectifier (30 A, 15 A per internal diode at 138° C, 0.55 V maximum voltage drop), which gives us a maximum theoretical current of 21 A or 71 W for this output.
Figure 13: One of the +12 V rectifiers, the +5 V rectifier, and the +3.3 V rectifier
This power supply uses an HY-510N monitoring integrated circuit, which supports only over voltage (OVP) and under voltage (UVP) protections.
Figure 14: Monitoring circuit
The electrolytic capacitors that filter the outputs are also Japanese, from Chemi-Con and Rubycon, and are labeled at 105° C, as usual.
