power supplies, commonly known as power adapters, If the output voltage is divided, it can be divided into step-up or step-down; if it is differentiated by the design technology, it can be divided into a traditional linear power supply or a switching power supply; if it is differentiated by the final application position, Can also be classified as stand-alone or embedded; it can be divided into AC by the input/output current. To AC, AC to DC, DC to AC, DC to DC.
Mains voltage, so there are two versions of 100-120VAC and 200-240VAC, small power supplies are mostly designed to plug directly into the wall, if the product is planned to sell the world, but also consider a large number of plug type.
The requirements of electromagnetic compatibility (EMC), in which the safety specifications are more complex, electromagnetic compatibility will only be a major problem if the switching power supply is used, and the conventional linear power supply is rarely subject to electromagnetic compatibility.
The regulations and standards that are complied with are also not the same. In principle, what kind of products to use should be used to determine the standards and standards that must be met.
Product Range: Span>
Information/Communications (e.g. LCD Monitor, Scanner, Printer, FaxMachine, Modem Digital Camera, etc., audio and video products (such as CD Player, DVD Player, tape recorders, game consoles, and LCD TVs) Etc.), Universal (If not specified for what product, and for general-purpose power supply, mostly used in home appliances), Charger (refers to general chargers for rechargeable batteries, such as mobile phones or digital cameras Chargers, manufacturers will consider using information products to classify this type), inverter (refer to the input is low voltage (such as connecting the car battery 12VDC), the output is high voltage 120VAC or 230CAC (for products)), uninterruptible power supply (rectified mains electricity to direct current, and then reversed to alternating current output; at the same time, to charge the battery. When the mains power is interrupted, the output of the battery is automatically reversed to the AC output to the equipment. Abbreviated as UPS).
EMC:EN 50091-2 LVD: EN 62040-1