Cooler Master Elite Power 350 W Power Supply Review
Secondary Analysis
Contents
This power supply has three Schottky rectifiers on its 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. Since this unit is based on the half-bridge topology, the duty cycle used is of 50%.
The +12 V output uses one SBL3060PT Schottky rectifier, which supports up to 30 A (15 A per internal diode), giving us a maximum theoretical current of 30 A or 360 W for the +12 V output.
The +5 V output uses one STPS3045CW Schottky rectifier, which supports up to 30 A (15 A per internal diode at 155° C, 0.84 V maximum voltage drop), giving us a maximum theoretical current of 30 A or 150 W for the +5 V output.
The +3.3 V output uses another STPS3045CW Schottky rectifier, giving us a maximum theoretical current of 30 A or 99 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, +12 V and +5 V rectifiers
The outputs are monitored by the ATX2005 integrated circuit shown in Figure 12. This chip offers only over voltage protection and under voltage protection.