Switching power supply is a power supply that controls the on and off of the power supply and maintains a stable output voltage. The switching power supply is generally composed of pulse width modulation (PWM) control IC and MOSFET. With the development and innovation of power electronics technology, the switching power supply technology Also constantly innovating.

RoHS is a mandatory standard established by EU legislation. Its full name is \"Restriction of Hazardous Substances\" (Restriction of Hazardous Substances). The standard has been officially implemented on July 1, 2006, and is mainly used to standardize the material and process standards of electrical and electronic products, making it more conducive to human health and environmental protection.

REACH is an abbreviation, which is the abbreviation of EU regulations \"Registration, Evaluation, Licensing and Restriction of Chemicals\". REACH testing exists in a wide range of industries. Anyone subject to REACH regulation must complete REACH legal obligations. It can be basically divided into substances, preparations, There are three major categories of articles, and the tested substances are substances that have been identified as SVHC. So far, the number of SVHCs has increased to 209.

WERCSmart is a supply chain security management system designed and developed by The WERCS company in the United States for large and medium-sized retailers. It can achieve: unified and effective management of a huge supplier network and products; security assessment of targets and existing products , Easy to filter. Such an authoritative review and appraisal procedure facilitates cooperation between suppliers and retailers more easily and conveniently. Suppliers with registered WERCSmart are undoubtedly the first choice for retailers to purchase.

SRRC certification is to strengthen the management of the import and production of radio transmission equipment. There are more and more wireless products in our market. When products are sold in the international market, they must meet the basic requirements of the market. SRRC certification is for wireless Electronic products undergo certain tests. Like Bluetooth devices on the market, wireless devices must undergo SRRC certification testing when they enter the market for sales.

With the development of the North American epidemic and the increasing demand for sterilization, disinfection, insect repellent, and mosquito-killing electrical products and equipment in the post-epidemic era, more and more disinfection and antibacterial appliances, air sterilization equipment, and non-insect and mosquito-repellent Large quantities of electrical products or equipment for medical purposes are exported to the United States. In accordance with the requirements of the Federal Insecticide, Fungicide and Rodenticide Act (FIFRA: Federal Insecticide, Fungicide and Rodenticide Act), electrical products such as sterilization, disinfection, insect repellent, and mosquito control are all within the scope of EPA control. Therefore, the majority of manufacturers and sellers need to pay special attention to the specific control requirements of EPA to avoid being denied entry when the goods enter the US customs.

On May 15, 2020, the European Commission issued the European Commission Executive Decision (EU) 2020/6591 to harmonize the standard EN IEC 63000:2018-Evaluation of technical documents related to the restriction of hazardous substances in electrical and electronic products (IEC 63000:2016), It replaces the technical document harmonization standard EN 50581:2012 to ensure compliance assessment of the 2011/65/EU (RoHS 2) directive. The previous EN 50581:2012 standard will be withdrawn on November 18, 2021.

On July 21, 2020, South Korea KC issued a new announcement 2020-0138, which officially established and abolished the Korean battery standard.