利盈娱乐(中国)创新平台有限公司

作用：半导体稳压二极管亦纳二极管（ZenerDiode）或电压调整二极，简称稳压管。稳压管和半导体二极管都具有(you)单向导电(dian)(dian)(dian)(dian)(dian)(dian)性质，仅(jin)仅(jin)靠观察外(wai)形(xing)，有(you)时很难加以区别。例(li)如，2CW7的(de)外(wai)形(xing)很象小功率二极管(guan)(guan)，而2DW7的(de)外(wai)形(xing)又与晶体管(guan)(guan)相似(si)。动态(tai)(tai)电(dian)(dian)(dian)(dian)(dian)(dian)阻也比较(jiao)大。对于稳(wen)(wen)(wen)压(ya)(ya)管(guan)(guan)，当反向电(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)超过其工作电(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)Vz（亦(yi)称齐纳电(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)或(huo)稳(wen)(wen)(wen)定电(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)）时，反向电(dian)(dian)(dian)(dian)(dian)(dian)流(liu)将突(tu)然增(zeng)大，而器(qi)件两端的(de)电(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)基本保持恒(heng)定。对应的(de)反向伏安特性曲线非常陡，动态(tai)(tai)电(dian)(dian)(dian)(dian)(dian)(dian)阻很小。稳(wen)(wen)(wen)压(ya)(ya)管(guan)(guan)可用作稳(wen)(wen)(wen)压(ya)(ya)器(qi)、电(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)基准、过压(ya)(ya)保护、电(dian)(dian)(dian)(dian)(dian)(dian)平转换器(qi)等。该书用Dz符号(hao)表示稳(wen)(wen)(wen)压(ya)(ya)管(guan)(guan)。

在稳(wen)压(ya)(ya)设(she)备和一(yi)些电(dian)子(zi)电(dian)路(lu)中(zhong)获得(de)广泛的应(ying)(ying)用。稳(wen)压(ya)(ya)管(guan)(guan)和半导体二(er)极管(guan)(guan)都(dou)具(ju)有(you)单(dan)向导电(dian)性质(zhi)，仅仅靠观察形状，有(you)时很(hen)难加以区别。特点：稳(wen)压(ya)(ya)二(er)极管(guan)(guan)的特点就(jiu)是击穿(chuan)(chuan)后(hou)，其两真个(ge)电(dian)压(ya)(ya)基(ji)本保持(chi)不变(bian)(bian)(bian)。对应(ying)(ying)的反向伏安特性曲线非常陡(dou)，动(dong)态(tai)电(dian)阻很(hen)小。这样，当把稳(wen)压(ya)(ya)管(guan)(guan)接入电(dian)路(lu)以后(hou)，若因为电(dian)源(yuan)电(dian)压(ya)(ya)发(fa)生波动(dong)，或其它原因造成电(dian)路(lu)中(zhong)各点电(dian)压(ya)(ya)变(bian)(bian)(bian)动(dong)时，负载两真个(ge)电(dian)压(ya)(ya)将基(ji)本保持(chi)不变(bian)(bian)(bian)。稳(wen)压(ya)(ya)管(guan)(guan)反向击穿(chuan)(chuan)后(hou)，电(dian)流固然在很(hen)大(da)范(fan)围内变(bian)(bian)(bian)化(hua)，但稳(wen)压(ya)(ya)管(guan)(guan)两真个(ge)电(dian)压(ya)(ya)变(bian)(bian)(bian)化(hua)很(hen)小。

稳压管(guan)也(ye)是一(yi)种晶体二极管(guan)，它是利用PN结的(de)击(ji)穿(chuan)区具有不乱电压的(de)特性来工作(zuo)的(de)。

作(zuo)用(yong)：半导体(ti)稳(wen)压(ya)(ya)(ya)(ya)二(er)极管(guan)亦纳二(er)极管(guan)（ZenerDiode）或电压(ya)(ya)(ya)(ya)调(diao)整二(er)极，简称稳(wen)压(ya)(ya)(ya)(ya)管(guan)。对于稳(wen)压(ya)(ya)(ya)(ya)管(guan)，当反(fan)向电压(ya)(ya)(ya)(ya)超过其工(gong)作(zuo)电压(ya)(ya)(ya)(ya)Vz（亦称齐纳电压(ya)(ya)(ya)(ya)或不乱电压(ya)(ya)(ya)(ya)）时，反(fan)向电流将溘(ke)然增大，而器件两真个(ge)电压(ya)(ya)(ya)(ya)基(ji)本保持恒(heng)定(ding)。该书(shu)用(yong)Dz符号表示稳(wen)压(ya)(ya)(ya)(ya)管(guan)。

。由(you)于这(zhei)(zhei)种特性，稳(wen)(wen)压(ya)(ya)管(guan)(guan)(guan)主要被作(zuo)(zuo)为稳(wen)(wen)压(ya)(ya)器或电压(ya)(ya)基准(zhun)元件使用。稳(wen)(wen)压(ya)(ya)管(guan)(guan)(guan)可(ke)用作(zuo)(zuo)稳(wen)(wen)压(ya)(ya)器、电压(ya)(ya)基准(zhun)、过压(ya)(ya)保护、电平转换器等。其(qi)(qi)伏(fu)安特性见稳(wen)(wen)压(ya)(ya)二极管(guan)(guan)(guan)可(ke)以串(chuan)联(lian)起来以便在(zai)较(jiao)高的电压(ya)(ya)上使用，通过串(chuan)联(lian)就可(ke)获得(de)更(geng)多的不乱电压(ya)(ya)。利(li)用这(zhei)(zhei)一(yi)特性，稳(wen)(wen)压(ya)(ya)管(guan)(guan)(guan)在(zai)电路中能起稳(wen)(wen)压(ya)(ya)作(zuo)(zuo)用。画出(chu)了稳(wen)(wen)压(ya)(ya)管(guan)(guan)(guan)的伏(fu)安特性及其(qi)(qi)符号。例如，2CW7的形(xing)状很(hen)象小功率二极管(guan)(guan)(guan)，而2DW7的形(xing)状又与晶体管(guan)(guan)(guan)相似。把这(zhei)(zhei)种类型的二极管(guan)(guan)(guan)称为稳(wen)(wen)压(ya)(ya)管(guan)(guan)(guan)，以区别用在(zai)整流(liu)、检波和其(qi)(qi)他单向导(dao)电场合的二极管(guan)(guan)(guan)。动态电阻(zu)也比较(jiao)大。

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