On this page we will take an in-depth look at the primary stage of the Aerocool E80-600. For a better understanding, please read our Anatomy of Switching Power Supplies tutorial.
This power supply uses a PBU1005 rectifying bridge, which is attached to an individual heatsink. It supports up to 10 A at 100° C so, in theory, you would be able to pull up to 1,150 W from a 115 V power grid. Assuming 80% efficiency, the bridge would allow this unit to deliver up to 920 W without burning itself out. Of course, we are only talking about these components, and the real limit will depend on all the other components in this power supply.
The active PFC circuit uses two
FDP18N50 MOSFETs, each one capable of delivering up to 18 A at 25° C or up to 10.8 A at 100° C (note the difference temperature makes) in continuous mode, or up to 72 A in pulse mode at 25° C. These transistors present a 265 mΩ resistance when turned on, a characteristic called RDS(on). The lower this number the better, meaning that the transistors will waste less power and the power supply will achieve a higher efficiency.
The output of the active PFC circuit is filtered by a capacitor from CapXon, labeled at 85° C.
In the switching section, another two FDP18N50 MOSFETs are used, and the basic technical specs for these transistors were already published above.
The primary is controlled by the omnipresent CM6800 active PFC/PWM combo controller.
Now let’s take a look at the secondary of this power supply.