LED驱动电路设计仿真+文献综述
关键词： LED；恒流电源；驱动器；变换器
Design of the driving circuit of LED
Abstract：Light Emitting Diode ,LED，is a kind of ability to electric energy into visible light semiconductor light emitting device, is a new kind of energy conservation and environmental protection, small size, fast, long life Light source. The wavelength of emitted light depends on the deference between the minimum energy of the conduction band and the maximum energy from the valence band. The LEDs light intensity depends on the current passing through it in direct mode. Today, white LEDs appear in the field of photovoltaic lighting technology as a promising solution. With economic development, LED as a rapid rise in recent years a new type of energy-saving light source in the world, won the high enthusiasm and a lot of attention, and as demand becomes sharply increase, it has been widely used in telecommunications, postal, banking, transportation, and other various industries. LED application cannot leave he needs the drive control circuit, drive circuit to get a good, steady current,nice to meet the application requirement of various occasions. In this study, the finishing and the LED constant current type and type of switching power supply, and the characteristics of pigeons, and selection and calculation method, and carried on the simulation and analysis for all kinds of lines.
KeyWords：LED; constant current source; drive; inverter
目 录
1 绪论 1
1.1 本文目标和讲述方法 2
1.2 内容介绍 2
2 LED的特性 4
2.1 LED的基本结构 4
2.2 LED的应用 4
2.3 LED的等效电路 5
2.4 LED的电学特性 5
2.5 LED正向导通压降与颜色和电流的关系 8
3 LED的驱动电路 9
3.1 LED驱动技术 9
3.2 典型LED驱动电路的研究 9
3.2.1 电容降压电路 10
3.2.2 利用PWM控制的白光LED基本驱动电路 10
3.3 LED集成驱动电路的研究 11
3.3.1 电荷泵驱动LED的典型电路 11
3.3.2 开关式DC／DC变换器驱动LED的典型电路 12
3.3.3 TPS6106×驱动白光LED的电路 14
4 线性电源 17
4.1简介 17
4.1.1基本工作原理 17
4.2线性电源设计的总体考虑 19
4.3线性电源设计实例 21
4.3.1基本分离元件的线性电源设计 21
4.3.2基本三端稳压电源设计 22
4.3.3浮地线性电源 23
4.4局限性 24
5 基于降压变换器的LED驱动电路 25
5.1降压变换器的工作原理 26
5.1.1 Buck变换器连续导电模式 27
5.1.2 Buck变换器电感电流不连续导电模式 29