1、 1 摘 要 本文设计了一个集成直流稳压电源。设计采用变压器变压，桥式整流电路进 行整流，电容对脉动电压进行滤波，最后用可调电阻和三端集成稳压器来实现直 流电压在 2.5V 到 25V 之间的连续可调。数字电压显示部分根据数字电压表的设 计原理，采用集成 TC7107 来完成模拟信号到数字信号的转换并驱动数码显示。 电压采用 LED 共阴极数码管显示。该稳压电源具有性能稳定，结构简单，电压 指标精度较高，调节方便等优点。 关键词：桥式整流、滤波、稳压、译码器、变压器、TC7107、模拟信号、数字信号、 数码显示管。 Abstract In this paper, the design is a
2、 regulated DC power supply. Adopted Transformer to change voltage, rectifier bridge rectifier circuit, capacitor ripple voltage on the filter, and finally with adjustable resistance and three-terminal voltage regulator integrated to achieve DC voltage between 2.5V to 25V continuously adjustable. Dig
3、ital voltage display digital voltage meter, based in part on the design principle, the use of integration to complete the TC7107 analog signal to digital signal conversion and drive the digital display. Voltage is adopting a total of cathode a digital LED to display. The regulated power supply with
4、stable performance, simple structure, voltages guide line has a high precision, the advantages of regulation and so on. Keyword: Bridge rectifier, Filtering, Regulators, Decoder, transformer, TC7107, Analog Signal, Digital Signal, Digital Display Tube. 2 目目 录录 一、前言.3 二、方案论证与比较.4 21 方案4 22 方案二4 23 方案论证与选择5 三、单元模块电路方案设计6 31 电源变压器部分. .6 32 整流滤波部分.7 3. 3 稳压部分.8 34 数字显示部分.10 四、元器件的选择12 五、实验调试14 六、电路各项性能的测试15 61 输出电阻的测量.15 62 纹波电压的测试.15 63 纹波因数的测量.15 64 最大输出电压与最大输出电流的测试15 七、设计总结.17
