The development trend and market prospects of power adapters
The power adapter is a power supply conversion device for small portable electronic equipment and electronic appliances. It is generally composed of a casing, a power transformer and a rectifier circuit. According to its output type, it can be divided into AC output type and DC output type; according to the connection method, it can be divided into wall plug And desktop.
Application of power adapter:
Power adapters are widely used in consumer electronic products. Most of the output power provided is within 100 watts, and the market demand is growing rapidly. Such as electric bicycle battery chargers, small size LCD TVs, notebook computers, printers, DVD players and set-top boxes, etc. have applications. Most of the early power adapters used linear transformers. As consumer electronic products require high efficiency and wide input voltage range for power adapters, as well as the increase in copper, iron, and labor costs, most of the original linear transformers in this type of power adapter gradually Replaced by switching power supply.
The development trend of power adapter:
Most power adapters can automatically detect 100-240V AC (50 / 60Hz). Power adapter is a small portable electronic equipment and electronic appliances power supply conversion equipment, it external power supply, with a line to connect with the host, so that the size and weight of the host can be reduced, only a very small number of equipment and electrical appliances have the power supply built into the host. It is composed of power transformer and rectifier circuit. According to its output type, it can be divided into AC output type and DC output type; according to connection mode, it can be divided into wall type and desktop type. There is a name plate on the power adapter, which indicates the power, input and output voltage and current quantity. Pay special attention to the range of input voltage.The power adapter first appeared in the mid-1980s. Toshiba of Japan took the lead in applying switching power supply technology to the external power supply of notebooks. Its pioneering work created a new page in the history of power adapter development and became the world’s first independent Notebook power adapter, because the power supply using switching power supply technology is external, the notebook does not need to consider the heat generated by power conversion to gather in the notebook itself, and the power adapter is easy to carry, and it effectively improves the commercialization of notebook computers. And popularization.
At present, the high frequency of power adapter has become the direction of its development. High frequency has made the switching power supply miniaturized and allowed the power adapter to enter a wider range of applications, especially in the application of high-tech fields, which has promoted the development of high-tech products. Miniaturization and portability. In addition, the development and application of power adapters are of great significance in saving energy, saving resources and protecting the environment.