本科生毕业论文
基于单片机的数字直流稳压电源的设计
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作者签名： 年 月 日
基于单片机的数字直流稳压电源的设计
摘 要
随着电子技术的不断发展，直流稳压电源已被运用于各类电子设备，仪器仪表与实际工程当中。随着科技的进步，各行业对所需直流电源有了更高要求，需要精度更高，调节范围更广，输出功率更大，性能更稳定的直流稳压电源。因而对其整体设计有了更高要求，需改变陈旧的设计思路及方法，为先进的设计思想以及电子元器件提供更创新的应用。
本文主要介绍了以AT89S52单片机为主控制器的直流稳压电源的设计方法，通过键盘设置直流电源的输出电压，数码管动态显示原理,定时中断原理,以此了解单片机的应用，同时介绍了数模转换芯片DAC0832和存储芯片24C01的工作原理。由模拟电源、控制电路、数模转换电路、放大电路、显示电路等部分构成其系统。输出电压范围在0～24V，最大电流可达330mA，设置步进等级能达0.1V，并显示其实际输出电压值。本系统由单片机程序控制数字输出信号，以其作为核心，用LED数码管显示输出电压，通过按键增加或减少输出电压。
首先，本文将概述数字直流稳压电源的研究目的与意义，以及国内外发展状况，研究方法和整体设计思路。
其次，本文将主要介绍数字直流稳压电源的基本原理，硬件组成与其系统硬件电路设计。并阐述数字直流稳压电源的整体设计思路以及数字直流稳压电源的功能模块设计及流程图
最后，本文将介绍数字直流稳压电源系统的软件设计。 在附录中，本文还将给出系统的程序清单，供参考之用。
【关键词】：数控电源，AT89S52单片机，直流稳压，数模转换
Abstract
With the continuous development of electronic technology, DC voltage has been applied to a variety of electronic equipment, instruments and practical engineering. With advances in technology, the industry has higher requirements for DC power required, need higher precision and a wider adjustment range, the output power is greater, more stable DC power supply.
Thus have higher requirements for the overall design, need to change old design thinking and methods for advanced design idea and the application of electronic components with more innovative. This article introduces the AT89S52 Single-chip microcomputer design method of controller of DC power supply, keyboard sets the output DC power supply voltage, digital animating principle, principles of timing interrupt in order to understand the application of single-chip, along with a DAC chip memory chip 24C01 and DAC0832 works. Translates the analog power supply and control circuits, digital circuits, amplifiers, display circuits and other parts of their system. 0~24V output voltage range, the maximum current of 330mA, sets the step level of 0.1V, and its actual output voltage value is displayed.
This system controlled by single chip digital output signal, in its capacity as the core, with LED digital tube display output voltage by pressing the increase or decrease in the output voltage.
First of all, this article outlines digital DC voltage-stabilized power supply for research purpose and meaning, and developments at home and abroad, research methods, and overall design. Secondly, this article introduces the basic principles of digital DC voltage-stabilized power supply, hardware and system hardware circuit design.
And set out the overall design as well as digital DC voltage-stabilized power supply features digital DC voltage-stabilized power supply module design and flowchart