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Energy Star amends spec for external power supplies

Posted: 12 Mar 2008 ?? ?Print Version ?Bookmark and Share

Keywords:Energy Star? external power supply? efficiency spec?

The U.S. Environmental Protection Agency (EPA) has relaxed the Active Mode requirement for efficiency as outlined in Final Draft Version 2.0 of the Energy Star EPS specification for external power supplies.

After its release on Feb. 19, an industry stakeholder alerted the EPA to a discrepancy in the masked dataset. EPA reviewed the EPS analysis used for the Final Draft levels and identified and corrected two errors found in how the analysis determined the qualification criteria (No-Load power and Active efficiency) for some products.

Based on the analysis, the agency declared that the Active Mode efficiency levels included with the Final Draft were more challenging than originally intended. No other changes have been made to the proposed specification. The newly proposed levels provide an overall qualification rate for No-Load power and Active efficiency of 27.4 percent with similar qualification rates across the different wattage bins as in the Final Draft Release.

Due to this change in Active levels, EPA has extended the comment deadline for the Revised Final Draft Specification to March 18, 2008. Click here for more details on the specification, including definitions and performance requirements charts.

- Vince Biancomano
Power Management DesignLine

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