Future proofing your designs – External power supplies and efficiency standards

//Future proofing your designs – External power supplies and efficiency standards

Future proofing your designs – External power supplies and efficiency standards

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With new legislation emerging at a fairly rapid pace, designers are faced with numerous challenges when ensuring that designs featuring external power supplies are compliant with the various standards in existence today. Only recently have we seen the implementation of Level VI standards in the US, but in Europe CoC Tier 1 and Tier 2 (Code of Conduct) standards, which are currently voluntary, already look to add additional requirements on top of the current Level VI standards.

About the EU Code of Conduct efficiency standards

The CoC Tier 1 standards came into being in 2014 as a voluntary standard, two years ahead of Level VI. It specifies power limits and efficiency standards comparable, though less stringent, to Level VI standards. The big difference between CoC and Level VI is the requirement for an extra efficiency measurement to be completed at 10% load where power supplies are historically inefficient. The CoC Tier 1 standards are currently under review set to become a mandatory Ecodesign rule at the beginning of 2017, with the new CoC Tier 2 standards, which further tightens no-load and active mode power limits enacted by Level VI, expected to become mandatory in early 2018.

CoC Tier 2 Single-Voltage External Ac-Dc Power Supply, Basic-Voltage

Nameplate Output
Power (Pout)
Minimum Average
Efficiency in Active Mode
(expressed as a decimal)
10% Load Average
Efficiency in Active Mode
(expressed as a decimal)
Maximum Power in
No-Load Mode (W)
0.3 W ≤ Pout ≤ 1 W ≥ 0.50 x Pout + 0.169 ≥ 0.50 x Pout + 0.060 ≤ 0.075
1 W < Pout ≤ 49 W ≥ 0.071 x ln(Pout) –
0.00115 x Pout + 0.670
≥ 0.071 x ln(Pout) –
0.00115 x Pout + 0.570
≤ 0.075
49 W < Pout ≤ 250 W ≥ 0.890 ≥ 0.790 ≤ 0.150
Pout > 250 W N/A N/A N/A

 

CoC Tier 2 Single-Voltage External Ac-Dc Power Supply, Low-Voltage

Nameplate Output
Power (Pout)
Minimum Average
Efficiency in Active Mode
(expressed as a decimal)
10% Load Average
Efficiency in Active Mode
(expressed as a decimal)
Maximum Power in
No-Load Mode (W)
0.3 W ≤ Pout ≤ 1 W ≥ 0.517 x Pout + 0.091 ≥ 0.517 x Pout ≤ 0.075
1 W < Pout ≤ 49 W  ≥ 0.0834 x ln(Pout) –
0.0011 x Pout + 0.609
≥ 0.071 x ln(Pout) –
0.00127 x Pout + 0.518
≤ 0.075
49 W < Pout ≤ 250 W ≥ 0.880 ≥ 0.780 ≤ 0.150
Pout > 250 W N/A N/A N/A

 

The challenges facing designers

As the environment becomes of growing concern, we are now very aware of the impact of emissions and the role energy efficiency has to play. But while these standards serve to meet the objectives of reducing energy consumption and creating more energy efficient designs, they pose considerable design challenges. Balancing innovation in design with the ever increasing rigour of efficiency standards is now a major factor in both design and part procurement.

The best way to avoid the pitfalls of these varying standards in both the EU, US and other countries is to select a power supply design that meets the latest and most stringent standards currently in place or under consideration. This can remove the complexities of managing different designs for different regions in order to meet the varying and quickly-evolving efficiency regulations around the world.

External power supply manufacturers play a huge role in meeting this challenge and in turn can solve many of the problems designers and engineers face with standards through the future-proofing of their own external power supplies. The designers and engineers we work with find that by using manufacturers who have a firm grasp on standards and whose design focuses on competitive, future thinking EPC’s, they can reduce time to market and solve the complexity of supply and distribution chains.

Ismosys represents CUI throughout Europe, who have published a wide array of resources to help designers and engineers navigate their way through the complexity of external power supplies, both in Europe and the US. For more information, check out the resources below to find out how CUI’s range of External Power supplies can help ease efficiency standard challenges in your designs.

Visit CUI’s main page
Download CUI’s efficiency standards briefing
Visit CUI’s website
By | 2016-10-21T09:15:34+00:00 October 21st, 2016|CUI|Comments Off on Future proofing your designs – External power supplies and efficiency standards

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