Coolmax V-500 Power Supply Review
Transient Filtering Stage
Contents
As we have mentioned in other articles and reviews, the first place we look when opening a power supply for a hint about its quality, is its filtering stage. The recommended components for this stage are two ferrite coils, two ceramic capacitors (Y capacitors, usually blue), one metalized polyester capacitor (X capacitor), and one MOV (Metal-Oxide Varistor). Very low-end power supplies use fewer components, usually removing the MOV and the first coil.
This power supply doesn’t come with the two MOVs that are required on the half-bridge design, which would be installed between the two electrolytic capacitors of the voltage doubler circuit.
Figure 8: Transient filtering stage
In the next page we will have a more detailed discussion about the components used in the Coolmax V-500.