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.
How many external power supplies are there in the EU?In 2020, 1.7 billion external power supplies (EPS) were in use in the EU27, of which 75% for residential use, on average 6.5 units per EU household. They converted 48 TWh/a of electricity from the 220V mains to the input needed by the powered products.
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 aga
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Jan 9, 2025 · 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
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Sep 14, 2023 · The U.S. Department of Energy (DOE) has recently proposed new energy conservation standards for External Power Supplies (EPSs). These
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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.
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.
In 2020, 1.7 billion external power supplies (EPS) were in use in the EU27, of which 75% for residential use, on average 6.5 units per EU household. They converted 48 TWh/a of electricity from the 220V mains to the input needed by the powered products.
All specifications, both EU and US standards, are based on taking an average of 25%, 50%, 75% and 100% of the nominal output power.
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.
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.
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