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单(dan)向(xiang)(xiang)导电(dian)(dian)(dian)(dian)性(xing)质，仅仅靠观(guan)察外形，有时(shi)(shi)很(hen)难加以(yi)区别(bie)。例如，2CW7的外形很(hen)象小功率二(er)极管(guan)，而(er)2DW7的外形又(you)与晶体管(guan)相似(si)。动(dong)态电(dian)(dian)(dian)(dian)阻(zu)也(ye)比较大。对(dui)于稳(wen)压(ya)(ya)管(guan)，当反(fan)向(xiang)(xiang)电(dian)(dian)(dian)(dian)压(ya)(ya)超过(guo)(guo)其工作(zuo)电(dian)(dian)(dian)(dian)压(ya)(ya)Vz（亦称(cheng)齐纳(na)电(dian)(dian)(dian)(dian)压(ya)(ya)或稳(wen)定(ding)(ding)电(dian)(dian)(dian)(dian)压(ya)(ya)）时(shi)(shi)，反(fan)向(xiang)(xiang)电(dian)(dian)(dian)(dian)流将突然增大，而(er)器(qi)件两端的电(dian)(dian)(dian)(dian)压(ya)(ya)基(ji)(ji)本保持恒定(ding)(ding)。对(dui)应的反(fan)向(xiang)(xiang)伏安(an)特(te)性(xing)曲线非常陡，动(dong)态电(dian)(dian)(dian)(dian)阻(zu)很(hen)小。稳(wen)压(ya)(ya)管(guan)可用(yong)作(zuo)稳(wen)压(ya)(ya)器(qi)、电(dian)(dian)(dian)(dian)压(ya)(ya)基(ji)(ji)准、过(guo)(guo)压(ya)(ya)保护、电(dian)(dian)(dian)(dian)平(ping)转换器(qi)等。该书(shu)用(yong)Dz符号表示稳(wen)压(ya)(ya)管(guan)。

在稳(wen)(wen)压(ya)(ya)设(she)备(bei)和一(yi)些电(dian)(dian)(dian)(dian)(dian)(dian)(dian)子电(dian)(dian)(dian)(dian)(dian)(dian)(dian)路中获得广泛的应(ying)用(yong)。稳(wen)(wen)压(ya)(ya)管(guan)和半导体二极管(guan)都具有(you)单向导电(dian)(dian)(dian)(dian)(dian)(dian)(dian)性(xing)质，仅(jin)仅(jin)靠观察形状，有(you)时很(hen)难加以(yi)区别。特点：稳(wen)(wen)压(ya)(ya)二极管(guan)的特点就是击(ji)(ji)穿(chuan)后(hou)，其(qi)两(liang)真(zhen)个电(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)基本保持不(bu)变。对应(ying)的反向伏安特性(xing)曲线(xian)非(fei)常陡，动(dong)态电(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻很(hen)小(xiao)。这样(yang)，当把稳(wen)(wen)压(ya)(ya)管(guan)接入电(dian)(dian)(dian)(dian)(dian)(dian)(dian)路以(yi)后(hou)，若因(yin)(yin)为电(dian)(dian)(dian)(dian)(dian)(dian)(dian)源电(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)发生波动(dong)，或其(qi)它原因(yin)(yin)造(zao)成电(dian)(dian)(dian)(dian)(dian)(dian)(dian)路中各点电(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)变动(dong)时，负载两(liang)真(zhen)个电(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)将基本保持不(bu)变。稳(wen)(wen)压(ya)(ya)管(guan)反向击(ji)(ji)穿(chuan)后(hou)，电(dian)(dian)(dian)(dian)(dian)(dian)(dian)流固然在很(hen)大范围内(nei)变化，但稳(wen)(wen)压(ya)(ya)管(guan)两(liang)真(zhen)个电(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)变化很(hen)小(xiao)。

稳(wen)压管(guan)也是一种晶体二极管(guan)，它是利用PN结的击穿区具有(you)不(bu)乱(luan)电压的特性(xing)来(lai)工作的。

作用：半导体稳(wen)压(ya)(ya)二极管(guan)亦纳(na)二极管(guan)（ZenerDiode）或(huo)电(dian)压(ya)(ya)调整二极，简称(cheng)稳(wen)压(ya)(ya)管(guan)。对于(yu)稳(wen)压(ya)(ya)管(guan)，当反向电(dian)压(ya)(ya)超过其工作电(dian)压(ya)(ya)Vz（亦称(cheng)齐纳(na)电(dian)压(ya)(ya)或(huo)不乱电(dian)压(ya)(ya)）时，反向电(dian)流将溘然增大(da)，而器件两真个电(dian)压(ya)(ya)基本保(bao)持恒定。该书用Dz符号(hao)表示稳(wen)压(ya)(ya)管(guan)。

。由于(yu)这种特(te)性(xing)，稳压(ya)(ya)(ya)(ya)管(guan)(guan)主要被(bei)作(zuo)(zuo)(zuo)为(wei)稳压(ya)(ya)(ya)(ya)器(qi)或(huo)电(dian)(dian)压(ya)(ya)(ya)(ya)基准元件(jian)使(shi)用(yong)。稳压(ya)(ya)(ya)(ya)管(guan)(guan)可用(yong)作(zuo)(zuo)(zuo)稳压(ya)(ya)(ya)(ya)器(qi)、电(dian)(dian)压(ya)(ya)(ya)(ya)基准、过压(ya)(ya)(ya)(ya)保护(hu)、电(dian)(dian)平转(zhuan)换(huan)器(qi)等。其(qi)伏安特(te)性(xing)见稳压(ya)(ya)(ya)(ya)二(er)极(ji)(ji)(ji)管(guan)(guan)可以串联(lian)起(qi)来(lai)以便在较高(gao)的(de)电(dian)(dian)压(ya)(ya)(ya)(ya)上使(shi)用(yong)，通过串联(lian)就可获得更多的(de)不乱电(dian)(dian)压(ya)(ya)(ya)(ya)。利用(yong)这一特(te)性(xing)，稳压(ya)(ya)(ya)(ya)管(guan)(guan)在电(dian)(dian)路中能起(qi)稳压(ya)(ya)(ya)(ya)作(zuo)(zuo)(zuo)用(yong)。画出了稳压(ya)(ya)(ya)(ya)管(guan)(guan)的(de)伏安特(te)性(xing)及其(qi)符号。例如，2CW7的(de)形(xing)状很象小功率二(er)极(ji)(ji)(ji)管(guan)(guan)，而2DW7的(de)形(xing)状又(you)与晶(jing)体管(guan)(guan)相似。把这种类(lei)型的(de)二(er)极(ji)(ji)(ji)管(guan)(guan)称为(wei)稳压(ya)(ya)(ya)(ya)管(guan)(guan)，以区(qu)别用(yong)在整流、检波和其(qi)他单向导电(dian)(dian)场(chang)合(he)的(de)二(er)极(ji)(ji)(ji)管(guan)(guan)。动(dong)态(tai)电(dian)(dian)阻(zu)也比(bi)较大(da)。

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