畢業(yè)設(shè)計(jì)論文_基于at89c51單片機(jī)數(shù)控直流穩(wěn)壓電源設(shè)計(jì)

1、長(zhǎng)春工業(yè)大學(xué)學(xué)士學(xué)位論文I摘要本文主要論述了一種基于AT89C51單片機(jī)為核心控制器的數(shù)控直流穩(wěn)壓電源的設(shè)計(jì)原理和實(shí)現(xiàn)方法，其主要由輔助電源、顯示電路、控制電路、數(shù)模轉(zhuǎn)換電路、穩(wěn)壓電路和模數(shù)轉(zhuǎn)換電路六部分組成。該系統(tǒng)原理是以AT89C51單片機(jī)為控制單元，以數(shù)模轉(zhuǎn)換芯片DAC0832輸出參考電壓，以模數(shù)轉(zhuǎn)換芯片TLC1534對(duì)采樣值進(jìn)行轉(zhuǎn)換為數(shù)字信號(hào)。輔助電源提供各個(gè)芯片、數(shù)碼管和放大器所需工作電壓，顯示電路用于顯示電源輸出電壓的大小，

2、輸出電壓值可通過按鍵對(duì)其進(jìn)行步進(jìn)控制（0.1V），并且在按鍵長(zhǎng)時(shí)間按下的時(shí)候能連續(xù)增加或減小。與傳統(tǒng)的穩(wěn)壓電源相比具有操作方便，電源穩(wěn)定性高以及其輸出電壓大小采用數(shù)碼顯示的特點(diǎn)。該系統(tǒng)具有抗干擾性能好，可靠性高，及最終輸出電壓值與真實(shí)顯示值精確度較高等優(yōu)點(diǎn)。關(guān)鍵詞關(guān)鍵詞:數(shù)控直流穩(wěn)壓電源AT89C51DAC0832TLC1543長(zhǎng)春工業(yè)大學(xué)學(xué)士學(xué)位論文1目錄摘要......................................

3、..............................................................................................IAbstract.....................................................................................................................

4、.............II緒論........................................................................................................................................11直流穩(wěn)壓電源...........................................................

5、.......................................................31.1直流穩(wěn)壓源概述.....................................................................................................41.1.1直流穩(wěn)壓源的定義.......................................

6、.................................................41.2方案的比較與選擇.................................................................................................41.2.1傳統(tǒng)直流穩(wěn)壓源.................................................

7、...........................................41.2.2數(shù)控直流穩(wěn)壓電源........................................................................................51.2.3方案的最終選擇..............................................................

8、..............................62數(shù)控直流穩(wěn)壓電源設(shè)計(jì)..................................................................................................72.1系統(tǒng)總體設(shè)計(jì)方案....................................................................

9、.............................72.2數(shù)控直流穩(wěn)壓源總體結(jié)構(gòu).....................................................................................73數(shù)模轉(zhuǎn)換模塊設(shè)計(jì)與實(shí)現(xiàn)..............................................................................

10、................93.1芯片方案選擇.........................................................................................................93.2DAC0832的簡(jiǎn)介...........................................................................

11、........................93.3DAC0832的引腳功能.........................................................................................103.4DA時(shí)序圖.................................................................................

12、..........................113.5DAC0832數(shù)模轉(zhuǎn)換模塊的設(shè)計(jì)與實(shí)現(xiàn).............................................................114TLC1543模數(shù)轉(zhuǎn)換模塊設(shè)計(jì)與實(shí)現(xiàn)...........................................................................134.1TLC1543的

13、簡(jiǎn)介..................................................................................................134.2TLC1543的特點(diǎn)..................................................................................................134.3TL

14、C1543的引腳功能..........................................................................................144.4TLC1543的設(shè)計(jì)與實(shí)現(xiàn)......................................................................................145輔助電源、升壓﹑串聯(lián)線性穩(wěn)

15、壓模塊的設(shè)計(jì)與實(shí)現(xiàn)................................................155.1輔助電源模塊.......................................................................................................155.2升壓模塊的分析.....................................

16、..............................................................165.2.1MC34063簡(jiǎn)介.............................................................................................165.2.2MC34063的特點(diǎn)................................

17、.........................................................165.2.3MC34063的電路原理.................................................................................165.2.4MC34063模塊的應(yīng)用............................................

18、.....................................175.3串聯(lián)線性穩(wěn)壓模塊...............................................................................................175.3.1集成運(yùn)放作比較電路...........................................................