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Enermax Platimax 600 W Power Supply Review

The Enermax Platimax is one of the first power supply series carrying the 80 Plus Platinum certification to reach the market. Let’s see how the 600 W model fared in our tests.

Home » Enermax Platimax 600 W Power Supply Review

Primary Analysis

Contents

  • 1. Introduction
  • 2. A Look Inside the Enermax Platimax 600 W
  • 3. Transient Filtering Stage
  • 4. Primary Analysis
  • 5. Secondary Analysis
  • 6. Power Distribution
  • 7. Load Tests
  • 8. Ripple and Noise Tests
  • 9. Overload Tests
  • 10. Main Specifications
  • 11. Conclusions

On this page we will take an in-depth look at the primary stage of the Enermax Platimax 600 W. For a better understanding, please read our “Anatomy of Switching Power Supplies” tutorial.

This power supply uses one LL25XB60 rectifying bridge, which is attached to an individual heatsink. This bridge supports up to 25 A at 113° C, so in theory, you would be able to pull up to 2,875 W from a 115 V power grid. Assuming 80% efficiency, the bridge would allow this unit to deliver up to 2,300 W without burning itself out (or 2,587.5 W at 90% efficiency). Of course, we are only talking about this particular component. The real limit wil
l depend on all the components combined in this power supply.

Enermax Platimax 600 W power supplyFigure 10: Rectifying bridge

The active PFC circuit uses two SiHG22N60S MOSFETs, each one supporting up to 22 A at 25° C or 13 A at 100° C in continuous mode (note the difference temperature makes), or 65 A at 25° C in pulse mode. These transistors present a 190 mΩ resistance when turned on, a characteristic called RDS(on). The lower the number the better, meaning that the transistor will waste less power, and the power supply will have a higher efficiency.

Enermax Platimax 600 W power supplyFigure 11: The active PFC transistors and diode

The active PFC is managed by a CM6502S active PFC controller.

Enermax Platimax 600 W power supplyFigure 12: Active PFC controller

The output of the active PFC circuit is filtered by a 470 μF x 400 V Japanese electrolytic capacitor, from Matsushita (Panasonic), labeled at 105° C.

In the switching section, another two SiHG22N60S MOSFETs are employed using a resonant configuration. The specifications for these transistors were already discussed above.

Enermax Platimax 600 W power supplyFigure 13: The switching transistors

The switching transistors are controlled by a CM6901 resonant controller.

Enermax Platimax 600 W power supplyFigure 14: Resonant controller

Let’s now take a look at the secondary of this power supply.

Continue: Secondary Analysis

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