Power Distribution
Contents
The Antec High Current Gamer 520 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 two SBR30A50CT Schottky rectifiers (30 A, 15 A per internal diode at 110° C, 0.55 V maximum voltage drop). This gives us a maximum theoretical current of 43 A or 514 W for the +12 V output.
The +5 V output uses another SBR30A50CT Schottky rectifier. This gives us a maximum theoretical current of 21 A or 107 W for the +5 V output.
The +3.3 V output uses an SBR40U45CT Schottky rectifier (40 A, 20 A per internal diode at 110° C, 0.52 V maximum voltage drop). This gives us a maximum theoretical current of 29 A or 94 W for the +3.3 V output.
Figure 14: The +12 V, +3.3 V, and +5VSB rectifiers
Figure 15: The +5 V and +12 V rectifiers
This power supply uses a PS223 monitoring integrated circuit, which supports over voltage (OVP), under voltage (UVP), over current (OCP), and over temperature (OTP) protections. This chip offers two +12 V channels, but the manufacturer decided to use only one of them to make this unit have a single +12 V rail.
Figure 16: Monitoring circuit
The electrolytic capacitors that filter the outputs are also Japanese, from Chemi-Con.
