基于ATS单片机的十字路口交通灯控制系统.docVIP

摘 要 稳压电源是各种电子的动力源，被人称为电路的心脏，所有用电设备，包括电子仪器仪表，家用电器等对供电电压都有一定的要求。至于精密的电子仪器，对供电电压的要求更为严格。所谓的DCDC直流稳压是指电压或电流的变化小到可允许的程度，并不是绝对的不变。 目前，随着单片开关电源集成电源的应用，开关电源正朝着短、小、轻、薄的方向发展。单片开关电源自20世纪90年代中期问世以来便显示出来强大的生命力，它作为一项颇具发展和影响力的新产品，引起了国内外电源界的普遍重视。尤其是最近两年来，国外一些著名的芯片厂家又竞相推出了一大批单片开关电源集成电路，更为新型开关电源的推广及奠定了良好的基础。单片开关电源具有集成度高、高性价化、最简外围电路，最佳性能等指标，现已成为开发中小功率开关电源、精密开关电源及电源模块的优选集成电路。关键词：；DCDC直流稳压；单片开关电源 Abstract Power supply is a power source for a variety of electronic, has been called the heart of the circuit, all electrical equipment, including electronic instrumentation, and household appliances to the supply voltage has certain requirements. The sophisticated electronic equipment, the supply voltage requirements more stringent. The so-called DC / DC voltage or DC current is small change to the extent permissible, not absolute change. ow, with the single application of integrated power switching power supply, switching power supply is moving in the short, small, light, thin direction. Chip switching power supply since the mid-20th century, 90 have shown since the advent of great vitality, as a considerable development and impact of new products, the power sector attracted widespread attention at home and abroad. Especially in the last two years, foreign manufacturers and some well-known chip introduced a large number of competing single-chip switching power supply integrated circuit, more promotion of the new switching power supply and lay a good foundation. Chip switching power supply with high integration, high price, the most simple external circuit, the best performance and other indicators, has now become the development of small and medium-power switching power supply, precision and power modules switching power supply integrated circuit optimization. Key words: Power Supply; DC / DC DC Power Supply; Chip switching power supply 目 录 引言…………………………………………………………………………………………1 1 DC/DC变换器的基础知识…………………………………………………………1 1.1 DC/DC变换的含义……………………………………………………………………1 1.2 DC/DC变换器的分类……………………………………