基于数显直流稳压电源的毕业设计

NANCHANG UNIVERSITY

毕业设计

The graduation design

（2009—2012年）

题 目: 数显式直流稳压电源电路设计 英文题目: Digital DC power supply circuit design 学 院: 共青学院 系 别: 信息工程系 专 业: 应用电子技术 班 级: 09应用电子技术（1）班 学生姓名: 余韦 学 号: 8210909051 指导老师: 愈金华 起讫日期:

二 ○ 一 一 年 十一月

摘 要

当今社会人们极大的享受着电子设备带来的便利，但是任何电子设备都有一个共同的电路--电源电路。大到超级计算机、小到袖珍计算器，所有的电子设备都必须在电源电路的支持下才能正常工作。常用的稳压电源有交流和直流之分，当然这些电源电路的样式、复杂程度千差万别。不可否认电源已经广泛地应用于我们生活的方方面面，所以，学习并了解电源的制作原理和技术对于我们的生产和发展都具有积极的意义。

由于电子技术的特性，电子设备对电源电路的要求就是能够提供持续稳定、满足负载要求的电能，而且通常情况下都要求提供稳定的直流电能。提供这种稳定的直流电能的电源就是直流稳压电源。直流稳压电源在电源技术中占有十分重要的地位。

本文主要设计并制作数字显示的直流稳压电源。本电源作为一个微型启动器，具有可调整电压，调压范围是1.25V-20V，而且具备输出电压可以显示的功能。本文介绍了直流稳压系统的总体的设计方案，它主要由变压器部分、整流滤波部分、稳压部分、电压数字显示部分和输出部分组成。电源的稳压部分用三端集成稳压管LM317完成，数字显示部分用ICL7107芯片完成。ICL7107是一种市场上应用非常广泛的集成芯片，内置程序，可以直接驱动LED数码管。本设计的显示部分是采用ICL7107芯片制作LED显示的数字电压表，并联到输出端，完成电压显示的功能。本电源具有设计简单灵活，成本低，效率高，调整精度高等优点，在市场上有很好的应用前景。

Abstract

Today's society people greatly enjoy the convenience of electronic equipment, electronic equipment, but any more than there is a common circuit - power supply circuit. Large supercomputers, small pocket calculator, all electronic devices must be more support in the power circuit to work properly. Commonly used with AC and DC power supply of the points, of course, the power supply circuit style, complexity vary widely. Undeniable power has been widely used in all aspects of our lives, so learn and understand the power of production principles and techniques for our production and development and many have a positive meaning.

As characteristic of electronic technology, electronic circuit design equipment for the power requirement is to provide a steady, full of energy load requirements, and usually require a stable DC performance. This can provide a stable DC power supply is DC regulated power supply. DC power supply in power supply technology plays a very important position.

In this paper, design and production figures show that the DC power supply. The power supply as a mini-starter with adjustable voltage regulator range 1.25-20V, and output voltage can be displayed with the function. This article describes the display section and the output DC component. Power supply regulator part of the integrated three-terminal regulator with a LM317 completed, the digital display section complete with TCL7107 chip. TCL7107 is a very broad application on the market integrated chip, built-in program, you can directly drive LED digital tube. The design of the display part of the chip is produced using TCL7107 LED display digital voltmeter, in parallel to the output voltage display function to complete.

目 录

1 前言 ........................................................................................................................................ 1 1.1 稳压直流电源的研究背景 ................................................................................................. 1 1.2 课题的主要内容 ................................................................................................................. 1 1.2.1 电源的输出控制 .............................................................................................................. 1 1.2.2 稳压直流电源的功能 ...................................................................................................... 2 1.2.3 性能指标 .......................................................................................................................... 2 1.2.4 论文的总体结构 .............................................................................................................. 2 2 方案的选择和设计思路 ........................................................................................................ 3 2.1 方案设计与论证 ................................................................................................................. 3 2.2 芯片的选择 ......................................................................................................................... 4 2.2.1 LM317三端可调节稳压器 ............................................................................................. 4 2.2.2 ICL7107三位半LCD/LED显示A/D转换器............................................................... 5 3 可调稳压直流电源的设计 .................................................................................................... 7 3.1 可调稳压直流电源的基本组成 ......................................................................................... 7 3.2 整流滤波电路 ..................................................................................................................... 8 3.2.1 整流电路 .......................................................................................................................... 8 3.2.2 滤波电路 .........................................................................................................................11 3.3 稳压电路 ..................................................................................................... …… 此处隐藏：5312字，全部文档内容请下载后查看。喜欢就下载吧 ……