Statutory requirements for "pure" power supplies have long been established worldwide. Now chargers have increasingly begun to capture the legislature's attention. The article describes the standards for the energy efficiency requirements for charging technology and circuitry solutions to conform with them. Around the globe power supply engineers encounter a multitude of standards for energy efficiency. In addition to voluntary programs for energy conservation such as Energy Star, or the Code of Conduct (CoC), there are also specific legal requirements for the efficiency of devices in local markets. For example, the ErP (Energy-related Products) specifications must be met for the European market to distribute the products. The U.S. market, however, requires EISA standards (Energy Independence and Security Act), MEPS applies to Australia (Minimum Energy Performance Standards), and Korea asks for KEMCO (Korea Energy Management Corporation). An example of the constant regulatory tightenings can be found in China, where currently a legal obligation instead of the previously voluntary China Energy Conservation Program (CECP) is being discussed. You can read the whole Article here.