文档介绍：摘要电力电子技术已发展成为一门完整的、自成体系的高科技技术,电力电子技术的发展带动了电源技术的发展,而电源技术的发展有效地促进了电源产业的发展。电源技术主要是为信息产业服务的,信息技术的发展又对电源技术提出了更高的要求,从而促进了电源技术的发展,两者相辅相成才有了现今蓬勃发展的信息产业和电源产业。从日常生活到最尖端的科学都离不开电源技术的参与和支持,而电源技术和产业对提高一个国家劳动生产率的水平,即提高一个国家单位能耗的产出水平,具有举足轻重的作用。在这方面我国与世界先进国家的差距很大,作为一个电源工作者,不仅要设计出国际或国内先进的电源,还要考虑到电源的适应性以及电源的成本。只有具有先进性能的电源,加上合理的制作成本,才能使我国的电源产业赶超发达国家。这里着重介绍了基于 TOP252Y 的单片开关电源,通过运用先进的电力电子技术等技术,实现了将普通市电转化为稳定地电压电流输出。首先介绍开关电源的含义,开关电源是利用现代电力电子技术,控制开关晶体管开通和关断的时间比率,维持稳定输出电压的一种电源,开关电源一般由脉冲宽度调制(PWM )控制 IC和MOSFET 构成。随着各种各样电器的出现以及升级,它们都需要一个稳定的电源,本文系统介绍了一种较为实惠又很先进的稳压稳流输出单片开关电源。关键词: 单片开关电源; 反激式;脉宽调制。 Abstract Electric and electronic technology has already developed into an intact high science, the development of electric and electronic technology has driven the development of the technology of the power supply, and the development of power technology has promoted the development of industry of the power supply effectively. The technology of the power mainly serves information industry, the development of the information technology has put forward higher request to the power supply, thus promoted the development of technology of the power supply, and it just had the vigorous information industry and power industry now. Can't do without the participation and support of the technology of the power from daily life to most advanced science, and the power technology and the power industry have very important function in raising the level ofa country's labor productivity, namely improve an output level of national unit's energy consumption. In this respect, our country and developed country have very great disparity. As a power worker, not only design the international or domestic advanced power supply, but also consider the adaptability and cost of the power supply. Only the advanced and low-priced power supply could make the power industry ofour country catch up with the developed country. Here, I will introduce the Single-Chip Switching Power Supply which based on the TOP252Y, by using the technology, su