Outdoor power supply electricity price standard

What are the new standards for power supply design?

In 2014, the US Department of Energy formalized their newest mandatory standard and the EU’s voluntary Code of Conduct version 5 took effect. This white paper briefly explains the US and EU’s new standards and what they mean to power supply designers.

Do external power supplies have a power efficiency mandate?

At a global level, mandates for power efficiency exist for most consumer electronics and home appliances. External power supplies have had regulations dating back to 2004, when the California Energy Commission created one of the first mandates for efficiency of external power supplies used to power appliances or consumer electronic devices.

What percentage of power does a power supply take?

All specifications, both EU and US standards, are based on taking an average of 25%, 50%, 75% and 100% of the nominal output power.

Which countries adopt voluntary and mandatory external power supply standards?

Since then, the US, European Union, China and other countries adopted both voluntary and mandatory external power supply standards as part of energy conservation legislation. Table 1 shows a breakdown of some of the current voluntary and mandatory standards by region.

What is a typical switch-mode power supply efficiency curve?

When looking at a typical switch-mode power supply efficiency curve, most power supplies reach max efficiency above 20% and maintain a fairly flat efficiency curve out to 70-80% of nominal output power when the efficiency begins to decrease again.

How do you know if a power supply meets the new ratings?

In order to determine if a power supply meets the new proposed power supply ratings, a set of international testing standards exist to determine the efficiency of the power supply. For a power supply with a maximum rating of 10W, for example, that power supply is said to have a Nameplate Output Power of 10W.