The first stage of China's power adapter development was before 1976, which was the initial embryonic stage of China's switching power supply and power adapter industry. All relevant power supply technologies are immature, not systematized and standardized. Before the 1980s, the external power supply was mainly linear power supply. The biggest disadvantage of linear power supply is that its volume and weight are larger than the power adapter, and its efficiency is low, but its advantages are stable operation, simple circuit, but it is particularly bulky, rough and inconvenient to carry.
In the mid-1980s, Toshiba in Japan took the lead in applying the switching power supply technology to the external power supply of notebooks. Its pioneering work created a new page in the development history of power adapters in the world, and it also became the world's first independent notebook power adapter. Because of the use of the external power supply of switching power supply technology, notebooks no longer need to consider that the heat generated by power conversion is concentrated in the notebook itself, and the power adapter is easy to carry, Chengerwei has effectively improved the commercialization and popularization of notebook computers, and has been used until today.
Since Toshiba started the notebook power supply and fully realized the switching power supply, notebook manufacturers have fully followed suit after taking the lead in completing the replacement of computer power supply. In the 1990s, power adapters have been widely used in various electronic and electrical equipment, program-controlled exchanges, communication, power detection equipment power supply and control equipment power supply.
At this stage, with the gradual and rapid development of the power industry, the majority of power science and technology workers urgently need to break the original closed state and understand the external world. Since the mid-1970s, power science and technology personnel have spontaneously organized technical exchanges. In 1978, the first national power technology exchange seminar was held. In 1983, the China power society was established and approved by the State Science and Technology Commission in 1986. At the end of the 1990s, a series of European standards on power conversion efficiency and standby power consumption pushed the power adapter to an insurmountable height. The high frequency of power adapter makes it the development direction. The high frequency makes the switching power supply miniaturized, and makes the power adapter more widely used, especially in the high-tech field, which promotes the miniaturization and portability of high-tech products. In addition, the development and application of power adapter is of great significance in energy saving, resource saving and environmental protection.
In 2001, apple developed a fashionable and lightweight power adapter, which pushed the power adapter to another new peak. The power adapter was brought to the direction of lightweight and fashion by the trend, so that the appearance of the power adapter is no longer as simple and unsightly as before.
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