Aerocool E80-600 Power Supply Review

Primary Analysis

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.

Figure 10: Rectifying bridge

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.

Figure 11: Active PFC transistors and diode

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.

Figure 12: Switching transistor

The primary is controlled by the omnipresent CM6800 active PFC/PWM combo controller.

Figure 13: Active PFC/PWM combo controller

Now let’s take a look at the secondary of this power supply.