基于光强检测的LED驱动控制电路的设计
毕业论文关键字：LED驱动电路，单片机STM32，SD42511芯片，Altium Designer，MDK
Abstract：Since the birth of LED in twentieth Century 60, in every neighborhood has been widely used, LED lighting everywhere, is changing our lives. LED is called the fourth generation light source, with energy-saving, environmental protection, safety, long service life, low power consumption, fever, high brightness, waterproof, miniature, shock proof, easy dimming, concentrated light beam, convenient maintenance and other characteristics. LED applications that require appropriate driving control circuit, the research work in this paper is to reduce the power consumption of the circuit and improve the precision of current control. The improving scheme is put forward, based on the feedback signal difference put Ambassador equivalent feedback resistance is reduced to achieve the purpose of reducing the power consumption of the circuit.
Key words：LED drive circuit，STM32microcontroller，SD42511IC，Altium Designer，MDK
目录
摘要 2
目录 3
第一章引言 5
1.1LED驱动技术的发展趋势 5
1.2 LED驱动技术的国内外现状 5
1.2.1国外LED电路发展现状 5
1.2.2国内LED电路发展现状 6
1.3本研究工作的意义与内容 6
第二章 硬件电路设计 7
2.1 LED发光原理： 7
2.2 LED特性： 7
2.3 LED驱动电路现状 7
2.4 LED驱动电路主要功能 8
2.5 LED驱动方式分类 8
2.5.1 恒压脉冲驱动 8
2.5.2 恒流脉冲驱动 8
2.5.3 555定时器 9
2.6光强检测 10
2.6.1 光强检测技术介绍 10
2.6.2光强检测技术的特点 10
2.6.3 光强检测电路的基本原理 11
2.6.4 光强检测电路的基本构成 11
2.6.5光强检测电路主放大器设计 11
2.6.6光强检测电路滤波器设计 12
2.6.7光强检测电路的设计原则 13
第三章 器材选用 13
3.1单片机stm32 13
3.1.1单片机stm32特点 13
3.1.2 stm32单片机型号选择 14
3.1.3 STM32F103ZET6芯片介绍 14
3.1.4 STM32F103ZET6开发板 14
3.2 芯片SD42511 16
3.2.1 芯片SD42511介绍 16
3.2.2芯片SD42511工作原理 16
3.2.3 PWM调光 17
3.2.4 输出电流设定 18
3.3 芯片SD42511演示板EKSD42511_01_V1.0 18
3.3.1 芯片SD42511演示板EKSD42511_01_V1.0介绍 18
3.3.2 芯片SD42511演示板EKSD42511_01_V1.0主要特点： 18
3.4 光电倍增管PMT 19
3.4.1光电倍增管PMT介绍 19
3.4.2 光电倍增管的原理 19
第四章 软件设计 19