【正文】 roduction 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 ministarter with adjustable voltage regulator range , and output voltage can be displayed with the function. This article describes the display section and the output DC ponent. Power supply regulator part of the integrated threeterminal regulator with a LM317 pleted, the digital display section plete with TCL7107 chip. TCL7107 is a very broad application on the market integrated chip, builtin 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 plete. IV 目 錄 1 前言 ........................................................................................................................................ 1 穩(wěn)壓直流電源的研究背景 ................................................................................................. 1 課題的主要內(nèi)容 ................................................................................................................. 1 電源的輸出控制 .............................................................................................................. 1 穩(wěn)壓直流電源的功能 ...................................................................................................... 2 性能指標(biāo) .......................................................................................................................... 2 論文的總體結(jié)構(gòu) .............................................................................................................. 2 2 方案的選擇和設(shè)計(jì)思路 ........................................................................................................ 3 方案設(shè)計(jì) 與論證 ................................................................................................................. 3 芯片的選擇 ......................................................................................................................... 4 LM317 三端可調(diào)節(jié)穩(wěn)壓器 ............................................................................................. 4 ICL7107 三位半 LCD/LED 顯示 A/D 轉(zhuǎn)換器 ............................................................... 5 3 可調(diào)穩(wěn)壓直流電源的設(shè)計(jì) .................................................................................................... 7 可調(diào)穩(wěn)壓直流電源的基本組成 ......................................................................................... 7 整流濾波電路 ..................................................................................................................... 8 整流電路 .......................................................................................................................... 8 濾波電路 ........................................................................................................................ 11 穩(wěn)壓電路 ........................................................................................................................... 13 過流保護(hù) ........................................................................................................................... 16 顯示電路 ........................................................................................................................... 18 參數(shù)的計(jì)算 .................................................................................................................... 19 元件的選擇 .................................................................................................................... 20 ICL7107 的校準(zhǔn) ............................................................................................................ 21 ICL7107 的供電電源 .................................................................................................... 21 4 穩(wěn)壓直流電源的測(cè)試 ......................................................................................................... 23 電源的輸出顯示精確度與紋波測(cè)試 ............................................................................... 23 V 負(fù)載能力測(cè)試 ................................................................................................................... 28 5 穩(wěn)壓直流電源的實(shí)物圖 ...................................................................................................... 30 通電后的工作情況 ........................................................................................................... 30 電源實(shí)物圖 .......................................................................................... 錯(cuò)誤 !未定義書簽。 ICL7107是一種市場(chǎng)上應(yīng)用非常廣泛的集成芯片，內(nèi)置程 序，可以直接驅(qū)動(dòng) LED數(shù)碼管。 本文主要設(shè)計(jì)并制作數(shù)字顯示的直流穩(wěn)壓電源。 不可否認(rèn)電源已經(jīng)廣泛地應(yīng)用于我們生活的方方面面，所以，學(xué)習(xí)并了解電源的制作原理和技術(shù)對(duì)于我們的生產(chǎn)和發(fā)展都具有積極的意義。 I NANCHANG UNIVERSITY 畢業(yè)設(shè)計(jì) The graduation design （ 2022— 2022 年） 題 目 :