Before 1976, the development of China's switching power supply and power adapter industry was in the initial stage.
All relevant power supply technologies are immature, not systematized and standardized. The external power supply was mainly a linear power supply before the 1980s. The biggest disadvantage of the linear power supply is that the volume and weight are larger than the power adapter, and the efficiency is low, The advantages are stable operation and simple circuit, but it is particularly heavy, rough, and inconvenient to carry.
It was the first to apply switching power supply technology to the external power supply of notebooks. Its pioneering initiative created a new page in the development history of power adapters in the world. It also became the world's first independent notebook power adapter because of the use of switching power supply technology. It also causes that the notebook does not need to consider power conversion, and the heat generated is concentrated in the notebook itself, and the power adapter is easy to carry, thus effectively improving the commercialization and popularization of notebook computers. It has been used to this day.
Since Toshiba turned on the notebook power supply and fully realized the switching power supply. And it took the lead in completing the replacement of computer power supplies, notebook manufacturers have fully followed suit. In the 1990s, power adapters have been widely used in various electronics, electrical equipment, program-controlled switches, communications, power testing equipment power supplies, and control equipment power supplies.
At this stage, with the gradual and rapid development of the power supply industry, the majority of power supply science and technology workers urgently need to break the original closed state and see the outside world.
At the end of the 1990s, Europe put forward a series of standards on power conversion efficiency and standby power consumption, pushing power adapters to a height that cannot be surpassed. The high frequency of the power adapter in the direction of its development. The high frequency makes the switching power supply miniaturized and enables the power adapter to enter a wider range of applications. Especially the application in the high-tech field has promoted the development trend of miniaturization and portability of high-tech products.
In addition, the development and application of power adapters are of great significance in saving energy, saving resources, and protecting the environment.
In 2001, Apple developed a stylish and lightweight power adapter, which pushed the power adapter to another new peak. Influenced by the trend, the power adapter became lighter and more fashionable. As a result, the product is becoming more and more popular.