多路输出线性直流稳压电源设计讲述.doc

多路输出线性直流稳压电源设计 设计总说明 随着电子技术迅速发展，对电子设备的电源要求越来越高。几乎所有电子设备中都需要稳定的直流电源。稳压电源具有体积小、重量轻、使用方便和工作可靠等优点，所以被广泛的作为各种晶体管仪器、仪表,教学、自动控制系统与设备的直流电源。目前国产直流稳压电源按集成稳压器种类主要可以分成线性稳压电源和开关稳压电源两大类。 该线性直流稳压电源输入为220V交流电，输出为±5V和+12V三路直流。电路主要由四部分构成，即电源变压器、整流电路、滤波电路、稳压电路。本文介绍了电源的分类、特点和发展现状，详细分析了变压器、整流电路、滤波电路、稳压电路四部分的方案选择及元器件的计算，给出了硬件设计电路原理图和PCB图，最后完成了电源调试，实现了基本功能。 关键词：稳压电源，protel,调试 Design of Multiple Output Linear DC Power Regulated Supply Design Description With the rapid development of electronic technology, power electronic devices have become increasingly demanding. Almost all electronic devices require a stable DC power supply. Regulated power supply characterizes small volume, light weight, facilitative and reliable, so widely used as the DC power supply of various transistor devices, instruments, education and automatic control systems and equipment. Current domestic DC power supply can be divided into linear regulated power supply and switching power supply according to types of integrated voltage regulators. The linear DC power supply has one 220V AC input , three DC outputs( ± 5V and +12 V). Circuit mainly consists of four parts, namely, power transformer, rectifier circuits, filtering circuits, and regulator circuits. This article describes the classification, characteristics and development of power , and a detailed analysis of the program choice of the four parts circuits and the calculation of selected components are given.The hardware schematic circuit diagram and PCB diagram are presented ,and the basic functions are implemented through debugging,. Keywords：regulated power supply，protel，debug 目录 1.绪论 1 1.1电源概述 1 1.1.1电源分类 1 1.1.2直流稳压电源的技术指标 4 1.2直流稳压电源的发展现状 5 2.方案论证 6 2.1设计要求 6 2.1.1 基本要求 6 2.1.2 扩展要求 6 2.2方案比较 6 2.2.1 总体设计方案比较 6 2.2.2 各模块方案选择和论证 7 3.硬件电路设计 12 3.1 Protel概述 12 3.2硬件的基本组成 13 3.3电路设计及元器件选择 13 3.3.1变压器 13 3.3.2整流二极管 14 3.3.3滤波电容 14 3.3.4降压、整流、滤波电路 14 3.3.5稳压电路 16 3.3.6保护电路 17 3.4 pcb印刷电路板设计 19 4.电源调试 21 4.1 实物图 21 4.2 电源调试 21 5.外壳设计 24 6．总结 25 致谢 26 参考文献 27