Power adapters are widely used in consumer electronics products. Most of the output powers they provide are within 100 watts, and market demand is growing rapidly. Such as electric bicycle battery chargers, small-size LCD TVs, laptops, printers, DVD players and set-top boxes, etc. are all used. Most of the early power adapters used linear transformers. As consumer electronics products have requirements for high efficiency and wide input voltage range of power adapters, as well as the increase in copper, iron and labor costs, most of the original linear transformers in this type of power adapters have gradually become obsolete. Replaced by switching power supply.

Development trends of power adapters

Power adapters first appeared in the mid-1980s. Japan's Toshiba took the lead in applying switching power supply technology to external power supplies for notebooks. Its pioneering work opened a new page in the history of power adapter development and became the world's first independent power adapter. Laptop power adapters use switching power supply technology to provide an external power supply, so the notebook does not need to consider the heat generated by power conversion to accumulate in the notebook itself, and the power adapter is easy to carry, which effectively improves the commercialization of notebook computers. and popularization.

At present, high frequency of power adapters has become the direction of its development. High frequency makes switching power supplies miniaturized and enables power adapters to enter a wider range of application fields, especially in high-tech fields, and promotes the development of high-tech products. Small and lightweight. In addition, the development and application of power adapters are of great significance in saving energy, saving resources and protecting the environment.