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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

Secondary 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

As one would expect in a high-efficiency power supply, the Enermax Platimax 600 W uses a synchronous design, where the Schottky rectifiers are replaced with MOSFETs. Also, the reviewed product uses a DC-DC design in its secondary. This means that the power supply is basically a +12 V unit, with the +5 V and +3.3 V outputs produced by two smaller power supplies connected to the main +12 V rail. Both designs are used to increase efficiency.

The +12 V output uses four IPP041N04N G MOSFETs, each one supporting up to 80 A at 100° C in continuous mode, or 400 A at 25° C in pulse mode, with a 4.1 mΩ RDS(on).

Enermax Platimax 600 W power supplyFigure 15: +12 V transistors

As explained, the +5 V and +3.3 V outputs are produced by two DC-DC converters. Each is located on two small daughterboards soldered to the main printed circuit board. In Figures 16 and 17, you can see the physical aspect of one of these converters. They are controlled by an APW7073 integrated circuit, using three APM2556NU MOSFETs, each supporting up to 160 A at 25° C or 90 A at 100° C in continuous mode, up to 60 A at 25° C or 48 A at 100° C in pulse mode, and 7.5 mΩ RDS(on).

Enermax Platimax 600 W power supplyFigure 16: One of the DC-DC converters

Enermax Platimax 600 W power supplyFigure 17: One of the DC-DC converters

This power supply uses a PS231S monitoring integrated circuit, which supports over voltage (OVP), under voltage (UVP), and over current (OCP) protections, with three +12 V channels, correctly matching the number of +12 V rails announced by the manufacturer.

Enermax Platimax 600 W power supplyFigure 18: Monitoring circuit

The electrolytic capacitors that filter the +12 V output are also Japanese, from Chemi-Con, and are labeled at 105° C, as usual. Some solid capacitors are also used.

Continue: Power Distribution

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