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Recommended Book
Power Supply Cookbook (EDN Series for Design Engineers) (EDN Series for Design Engineers)
By Marty Brown
Newnes
Price: $81.05

Home » Power
Enermax Liberty DXX 500W Power Supply Review
Author: Gabriel Torres
Type: Reviews Last Updated: April 13, 2008
Page: 2 of 9
$ Check REAL-TIME pricing for Enermax Liberty ELT500AWT (ELT500W) 500-Watt Power Supply $
Newegg.com: $99.99 Amazon: $114.59

A Look Inside Liberty DXX 500W

We decided to disassemble this power supply to see how it looks like inside, what is the design used and what components are used. Please read our Anatomy of Switching Power Supplies tutorial to understand how a power supply works inside and to compare this power supply to others.

In this page we will have an overall look, while on the next pages we will discuss in details the quality and rating of the components used.

Enermax Liberty DXX 500 W
click to enlarge
Figure 4: Overall look.

Enermax Liberty DXX 500 W
click to enlarge
Figure 5: Overall look.

Enermax Liberty DXX 500 W
click to enlarge
Figure 6: Overall look.

As we mentioned on other articles and reviews, the first place we like to take a look when opening a power supply to have a hint about its quality is its filtering stage. The recommend 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 than that, usually removing the MOV and the first coil.

This power supply is impeccable, bringing one extra ferrite coil and two extra Y capacitors, on this stage, plus one additional X capacitor after the rectifying bridge and two ferrite beads, one on the main AC cable and another on the cable connecting the transient filtering to the main printed circuit board (on this power supply the transient filtering stage is located on a separated printed circuit board, see Figure 7). On this unit the MOV is installed after the rectifying bridge, a configuration that is typical with units using older projects.

Enermax Liberty DXX 500 W
click to enlarge
Figure 7: Transient filtering stage (part 1).

Enermax Liberty DXX 500 W
click to enlarge
Figure 8: Transient filtering stage (part 2).

Now let’s have a more detailed discussion on the components used on Liberty DXX 500 W.

Pages (9): « 1 [2] 3 4 5 6 7 8 9 »
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