学位论文—led照皓电路设计.doc 38页

2018-09-29 栏目:伟德国际1946 作者: admin

  XXXXXXX学院

  逝业设计

  题 目

  姓 名

  学 号

  专业班级

  分 院

  指点教养员

  20XX年XX月XX日

  LED照皓电路设计

  摘要

  发光二极管(Light Emitting Diode,LED)是21世纪最具展开前景的壹种时新气态光源。LED的迅快展开及普遍运用,将伸发照皓范畴的壹场革命。 LED具拥有环保性好,运用寿命长,单色性好,色艳丽厚墩墩,体积小,分量轻,照顾快度快,发光效力高,能量消费高等优点。

  当前,LED在景不清雅照皓等壹些运用中父亲多使用提交流动市电电源供电。LED的展开和运用的目的是代替白炽灯等传统光源,LED运用照皓范畴的触动力依然首要到来己于电网。我国的市电电源是220V/50HZ,国际畅通用提交流动线路为85~265V,50/60HZ。鉴于LED要寻求在直流动低电压下工干,采取市电电源供电,则需寻求经度过适当的电路拓扑,也坚硬是LED驱触动电路将其替换为适宜LED工干要寻求的直流动电源。

  当今设计驱触动电路的普畅通文思是先将220V的压服电经度过壹个变压器,使其成了英公低电压的直流动电。在经度过壹个桥式整顿流动电路,把直流动电替换成直流动电。在整顿流动桥后并上两电容,壹个是平缓电容,滤摒除剩的直流动电,壹个是高频偏旁路电容,滤摒除高频分量。此雕刻么就剩所需的压服直流动电。前面却根据设计的需寻求,包上不一的芯片,完成所需寻求的干用。如恒压,恒流动,反应,温度补养偿等。

  伟德国际网址:发光二级管,照皓,直流动电,低电压,驱触动电路

  Abstract

  Summary led (Light Emitting Diode,LED) is the 21st century with the most development prospects of a new type of solid state light source. Rapid development and wide application of LED, lighting a revolution in the field will be thrown. LED has a good environmental protection, long service life, well monochrome, color rich, small volume, light weight, fast response, high luminous efficiency, low energy consumption.

  At present, most LED landscape lighting in some applications, such as using AC mains power supply. Development and application of LED's goal is to replace traditional light sources such as incandescent lamps, LED lighting energy is still mainly come from the power grid in the field of the application. Mains power supply is 220V/50HZ in China, international AC line to 85~265V,50/60HZ. Because LED requires working in DC low-voltage, power supply, you need to go through the appropriate circuit topology, which LED drive circuit converts with the LED work requirements of DC power supply.

  Now drive circuit design of the general idea is the first high voltage of 220V through a transformer, making it into a low-voltage AC. In a bridge rectifier circuits, to convert AC to DC. After the bridge rectifier and two capacitors, a smoothing capacitor, filter out the rest of

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