For AC/DC power, driving this trend is not technical breakthroughs, but a good design, and innovative combination of the advantages of a variety of techniques and technologies to develop a performance above average power. It Will be discussed in this article is the common 100W-200W AC/DC power adapter supply design, which emphasized the combination of programs to design the outside Minimum cost, lowest power, and achieve maximum efficiency and application flexibility.

    First, the power adapter must be as small as possible, to give the other features of the system to leave more space

     Second, the effectiveness of the power adapter the higher the better. In practice, the power adapter is not the most energy, but the microprocessor, but the power still needs to further enhance the effect, because the efficacy of the higher, the smaller the heat sink required, so as to further save space. For 100W-200W power supply, to achieve 90% efficiency is not realistic. Every 1% increase in power efficiency of high power, heat can be reduced by 10%, and the degree of power required for cooling will produce a great difference.

Third, the cost of course is always the most important factor, regardless of the cost of raw materials or manufacture of complexity. The simple design is an important factor. Finally, we need to consider function. Control and alarm signals, and similar equipment, current as well as in the case of a variety of AC input is very important to maintain a stable performance