毕业设计(论文)_基于AT89C51单片机数控直流稳压电源设计

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摘 要

本文主要论述了一种基于AT89C51单片机为核心控制器的数控直流稳压电源的设计原理和实现方法，其主要由辅助电源、显示电路、控制电路、数模转换电路、稳压电路和模数转换电路六部分组成。

该系统原理是以AT89C51单片机为控制单元，以数模转换芯片DAC0832输出参考电压，以模数转换芯片TLC1534对采样值进行转换为数字信号。辅助电源提供各个芯片、数码管和放大器所需工作电压，显示电路用于显示电源输出电压的大小，输出电压值可通过按键对其进行步进控制（±0.1V），并且在按键长时间按下的时候能连续增加或减小。与传统的稳压电源相比具有操作方便，电源稳定性高以及其输出电压大小采用数码显示的特点。该系统具有抗干扰性能好，可靠性高，及最终输出电压值与真实显示值精确度较高等优点。

关键词: 数控直流稳压电源 AT89C51 DAC0832 TLC1543 精选文档

可编辑修改 Design of Digital Power source

Abstract

The method of this paper based on the AT89C51 microcontroller core of the

numerical controller DC power supply design theory and realization. The

digital DC power supply from the analog power, display circuit, control

circuit, digital-to-analog conversion circuit, regulator circuit and

analog-to-digital converter circuit composed of six parts.

This system is based on the principle of single-chip microcomputer to

control the unit AT89C51 to DAC0832 digital-to-analog converter chip

reference voltage to control the output voltage, while the analog-to-digital

converter ADC0832 chip convert the sampling of voltage to digital signals.

Analog power supply to provide the various chips, digital amplifier control

and the required operating voltage, display circuit for displaying the size

of power supply output voltage, output voltage value may be stepping through

the control button (± 0.1V), and a long button press when under the continuous

increase or decrease. And compared to the traditional regulated power supply

with easy to operate, high power stability, as well as the size of the output

voltage characteristics of the use of digital display. This system has the

resistance to interference well, the reliability is high, and finally output

voltage value and real demonstration value precision higher merit.

Key words: Digital DC Voltage-stabilized Power Source AT89C51 DAC0832

TLC1543

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可编辑修改 目 录

摘 要 .................................................................................................................................... I

Abstract.................................................................................................................................. II

绪论 ....................................................................................................................................... 1

1 直流稳压电源 ................................................................................................................. 3

1.1 直流稳压源概述 .................................................................................................... 4

1.1.1 直流稳压源的定义 ....................................................................................... 4

1.2 方案的比较与选择 ................................................................................................ 4

1.2.1 传统直流稳压源 ........................................................................................... 4

1.2.2 数控直流稳压电源 ....................................................................................... 5

1.2.3 方案的最终选择 ........................................................................................... 6

2 数控直流稳压电源设计 ................................................................................................. 7

2.1 系统总体设计方案 ................................................................................................ 7

2.2 数控直流稳压源总体结构 .................................................................................... 7

3 数模转换模块设计与实现 ............................................................................................. 9

3.1 芯片方案选择 ........................................................................................................ 9

3.2 DAC0832的简介 ................................................................................................... 9

3.3 DAC0832的引脚功能 ......................................................................................... 10

3.4 D/A时序图 .......................................................................................................... 11

3.5 DAC0832数模转换模块的设计与实现 ............................................................. 11

4 TLC1543模数转换模块设计与实现........................................................................... 13

4.1 TLC1543的简介 .................................................................................................. 13

4.2 TLC1543的特点 .................................................................................................. 13

4.3 TLC1543的引脚功能 .......................................................................................... 14

4.4 TLC1543的设计与实现 ...................................................................................... 14