Power supply, generally called power adapter, can be divided into boost or buck if it is distinguished by the output voltage; if it is differentiated by design technology, it can be divided into traditional linear power supply or switched power supply. If it is distinguished by the final application position, it can be divided into independent type or embedded; finally, it can be divided into AC to AC, AC to DC, DC to AC, DC to DC by input/output current. Four categories.
The power supply reduces the mains power supply or the low voltage to the mains voltage, so there are two versions of 100-120VAC and 200-240VAC. The small power supply is mostly designed to be directly plugged into the wall. If the product is planned to be sold globally, many plug types are also considered.
Power supply regulations generally comply with safety (Safety) and electromagnetic compatibility (EMC) requirements, of which safety specifications are more complex, electromagnetic compatibility is only a big problem when switching power supply, traditional linear power supply Electromagnetic compatibility problems are rare.
When the power supply is supplied to different products, the regulatory standards that should be met are also different. In principle, the products to be used should be used to determine the regulatory standards to be met.
Product Range:
Information/communication (such as LCD Monitor, Scanner, Printer, Fax Machine, Modem Digital Camera, etc.),
audio and video products (such as CD Player, DVD Player, tape recorder, game console, LCD TV, etc.), universal (if not specified) In which products, and for general-purpose power supplies, most of them are used in home appliances), chargers (referring to general rechargeable battery chargers, such as mobile phones or digital cameras professional chargers, manufacturers will consider information Class products to classify this type), converter (referring to the input is low voltage (such as 12VDC connected to the car battery), the output is high voltage 120VAC or 230CAC), uninterruptible power supply (converting the mains to direct current, Inverter is the AC output; at the same time, the battery is charged. When the mains are interrupted, the battery output DC is automatically converted into AC output to the device, which is abbreviated as UPS in English.
Implementation standards:
EMC: EN 50091-2 LVD: EN 62040-1
