基于STM32的LED驱动电源设计

基于STM32的LED驱动电源设计

摘要

高亮LED是当今照明技术的重大进步。LED驱动电源的控制核心采用ARM系列微处理器STM32，实现LED驱动的智能控制。ARM系列微处理器的应用越来越广泛，其采用当前最先进的设计理念，使得性能大大提升。能使我们在微控制器、集成开发软件、编程语言等知识的学习和掌握水平，使我们在微控制器设计、软件编程等方面的应用能力得到全面训练和提高。

对于一般照明而言，人们更需要白色的的光源。作为一种新型的光源，LED具有无污染、长寿命、耐振动和抗冲击的鲜明特点。虽然白光LED的发光效率正在逐步提高，但是与LED灯配套的驱动器性能不佳，故障率高成了LED推广应用的瓶颈。因此众多厂家选用恒流方式驱动LED，从而设计的开关电源就需要一个能恒流的直流驱动电源。传统的开关电源控制集成电路具有效率高、输出稳定、可靠性高，并可实现远程控制等功能。完全适合用来驱动LED的开关电源。

本文主要通过设计一个恒流驱动电源来驱动LED。通过各种电力电子组件和电力电子电路组成一个恒流的电源，达到设计的要求。

关键词：LED，电源，驱动，STM32

STM32-based software design of the LED drive power

Author : Dai Y uanwei

Tutor : Zhang Yuxiang

Abstract

Bright LED lighting technology is today a major advancement. LED drive power control core with ARM family of microprocessor STM32, realization of LED-driven intelligent control.ARM family of microprocessor used more widely, which uses the most advanced design concepts, making the performance greatly enhanced.Allow us to micro-controllers, integrated development software, programming languages, such as knowledge, learning and mastery level, so that we in micro-controller design, software programming and other aspects of competency have been fully trained and improved.

For general lighting purposes, people need white light.As a new type of light source, LED has no pollution, long life, resistance to vibration and shock of the distinct characteristics.Although the luminous efficiency white LED is gradually improving, but with LED lights matching drive poor performance, promote the use of LED failure rate has become the bottleneck.So many manufacturers use constant current mode to drive LED, and thus the design of switching power supply will need a constant current of the DC drive power.The conventional switching power supply control IC with high efficiency, output stability, high reliability, and offer features such as remote control.Entirely suitable for driving LED's switching power supply.

In this paper, through the design of a constant current drive power to drive the LED.Through a variety of power electronic components and power electronic circuits to form a constant current power supply, to meet the design requirements.

Key words: LED, Power , Drive, STM32

目录

1 绪论 (5)

1.1 课题背景介绍 ............................................................................. 错误!未定义书签。

1.2 课题研究方案 ............................................................................. 错误!未定义书签。

1.3 课题研究方法 (2)

1.4 整体电路框图 ............................................................................. 错误!未定义书签。

2 系统所用主要芯片介绍 ...................................................................... 错误!未定义书签。

2.1 STM32处理器功能介绍 ........................................................... 错误!未定义书签。

2.2 模拟/数字转换(ADC) (13)

2.2.1 介绍 (13)

2.2.2 主要特征 (13)

2.2.3 引脚描述 (14)

2.2.4 功能描述 (15)

3 系统硬件电路设计 (17)

3.1 LED驱动电路的分析过程 (17)

3.2 功率及驱动电路设计 (18)

3.2.1 IR2110简介 (18)

3.2.2 IR2110内部结构和特点 (19)

3.3 反馈和保护电路设计 (20)

3.3.1 综述 (20)

3.3.2 软启动电路设计 (21)

3.3.3 电源电路设计 (21)

3.3.4 开关电源保护电路设计 (22)

4 PWM控制电路 (27)