TVS瞬(shun)態(tai)抑制二極(ji)管失(shi)效(xiao)(xiao)模式(shi)：1：當(dang)(dang)瞬(shun)態(tai)脈沖(chong)(chong)能(neng)(neng)(neng)量(liang)大于TVS所(suo)能(neng)(neng)(neng)承(cheng)受(shou)能(neng)(neng)(neng)量(liang)時會(hui)引起TVS器件(jian)過電(dian)(dian)應(ying)力(li)損傷，特別是當(dang)(dang)瞬(shun)態(tai)能(neng)(neng)(neng)量(liang)遠(yuan)遠(yuan)超出TVS所(suo)能(neng)(neng)(neng)承(cheng)受(shou)的數倍時會(hui)直接導(dao)致(zhi)TVS過電(dian)(dian)應(ying)力(li)燒(shao)毀。失(shi)效(xiao)(xiao)模式(shi)為短路(lu)(lu)(lu)。2：當(dang)(dang)電(dian)(dian)路(lu)(lu)(lu)中通過的電(dian)(dian)流(liu)太(tai)大，可能(neng)(neng)(neng)會(hui)造成TVS炸(zha)裂(lie)，失(shi)效(xiao)(xiao)模式(shi)為開(kai)路(lu)(lu)(lu)。這種情況(kuang)通常(chang)為設計(ji)時考慮不周全(quan)，TVS通流(liu)量(liang)過小(xiao)造成的。3：電(dian)(dian)性能(neng)(neng)(neng)退化當(dang)(dang)TVS經過成千上萬次的標準脈沖(chong)(chong)沖(chong)(chong)擊后(hou)失(shi)效(xiao)(xiao)，失(shi)效(xiao)(xiao)模式(shi)為短路(lu)(lu)(lu)。這種模式(shi)因長(chang)時間工(gong)作結溫持續增大導(dao)致(zhi)（器件(jian)內部結構(gou)變化、散熱(re)能(neng)(neng)(neng)力(li)下降）過熱(re)燒(shao)毀。多線(xian)保護選用(yong)TVS 陣列更(geng)為有(you)利。重慶SMA瞬(shun)態(tai)抑制二極(ji)管電(dian)(dian)壓(ya)

電(dian)(dian)壓及電(dian)(dian)流的(de)(de)(de)(de)瞬(shun)態干擾(rao)(rao)是(shi)造(zao)成(cheng)電(dian)(dian)子電(dian)(dian)路及設備損壞(huai)的(de)(de)(de)(de)主要原因(yin)，常給人們帶來無法(fa)估量(liang)的(de)(de)(de)(de)損失。這(zhe)些干擾(rao)(rao)通常來自于電(dian)(dian)力設備的(de)(de)(de)(de)起停(ting)操作、交流電(dian)(dian)網(wang)的(de)(de)(de)(de)不穩(wen)(wen)定(ding)、雷擊干擾(rao)(rao)及靜(jing)電(dian)(dian)放電(dian)(dian)等,瞬(shun)態干擾(rao)(rao)幾乎(hu)無處(chu)不在、無時不有(you)，使(shi)人感(gan)到防不勝防。幸好(hao),一種(zhong)高效(xiao)能的(de)(de)(de)(de)電(dian)(dian)路保護器件TVS的(de)(de)(de)(de)出現使(shi)瞬(shun)態干擾(rao)(rao)得到了(le)有(you)效(xiao)抑制(zhi)，TVS（TransientVoltageSuppressor）或稱瞬(shun)態抑制(zhi)二(er)極管(guan)(guan)，是(shi)在穩(wen)(wen)壓管(guan)(guan)工藝基礎上發展起來的(de)(de)(de)(de)一種(zhong)新產品(pin)，其電(dian)(dian)路符號和普通穩(wen)(wen)壓二(er)極管(guan)(guan)相同，外形也與普通二(er)極管(guan)(guan)無異。1000W瞬(shun)態抑制(zhi)二(er)極管(guan)(guan)功率計算(suan)DO-201封裝的(de)(de)(de)(de)TVS有(you)1.5KE系列（5000W）、LCE系列。

熱電(dian)(dian)(dian)擊穿(chuan)：當(dang)pn結(jie)施加反(fan)(fan)向(xiang)電(dian)(dian)(dian)壓(ya)(ya)時，流過(guo)pn結(jie)的(de)反(fan)(fan)向(xiang)電(dian)(dian)(dian)流要引起熱損(sun)耗(hao)。反(fan)(fan)向(xiang)電(dian)(dian)(dian)壓(ya)(ya)逐(zhu)漸增(zeng)大時，對于一定的(de)反(fan)(fan)向(xiang)電(dian)(dian)(dian)流所(suo)損(sun)耗(hao)的(de)功率(lv)也增(zeng)大，這將(jiang)產生大量(liang)熱量(liang)。如果(guo)沒(mei)有良好的(de)散(san)熱條件使這些熱能及時傳遞出去，則將(jiang)引起結(jie)溫(wen)上升(sheng)。這種(zhong)由于熱不穩定性(xing)引起的(de)擊穿(chuan)，稱(cheng)為熱電(dian)(dian)(dian)擊穿(chuan)。擊穿(chuan)電(dian)(dian)(dian)壓(ya)(ya)的(de)溫(wen)度特性(xing)：溫(wen)度升(sheng)高(gao)后，晶(jing)格振動(dong)加劇(ju)，致使載流子運動(dong)的(de)平均自由路程縮短，碰(peng)撞前動(dong)能減小，必須加大反(fan)(fan)向(xiang)電(dian)(dian)(dian)壓(ya)(ya)才能發生雪崩擊穿(chuan)具(ju)有正的(de)溫(wen)度系數，但溫(wen)度升(sheng)高(gao)，共價鍵(jian)中的(de)價電(dian)(dian)(dian)子能量(liang)狀態高(gao)，從而齊(qi)納擊穿(chuan)電(dian)(dian)(dian)壓(ya)(ya)隨溫(wen)度升(sheng)高(gao)而降低，具(ju)有負的(de)溫(wen)度系數。

這(zhe)里(li)說的(de)(de)TVS管(guan)包(bao)括(kuo)防ESD用的(de)(de)小功率TVS管(guan)（本文簡(jian)稱ESD管(guan)）和防浪(lang)涌用的(de)(de)大(da)功率TVS管(guan)（本文簡(jian)稱浪(lang)涌管(guan)）。這(zhe)里(li)說的(de)(de)浪(lang)涌測(ce)試標(biao)(biao)準(zhun)指(zhi)TVS器件規格(ge)書(shu)上(shang)標(biao)(biao)明的(de)(de)測(ce)試標(biao)(biao)準(zhun)：IEC61000-4-2Level4ESDProtection——靜電測(ce)試標(biao)(biao)準(zhun)，必(bi)須通過(guo)，提(ti)供(gong)測(ce)試數據(ju)IEC61000-4-4Level4EFTprotection——部(bu)分廠(chang)家才會提(ti)供(gong)數據(ju)IEC61000-4-5（8/20us）——浪(lang)涌測(ce)試標(biao)(biao)準(zhun)，必(bi)須通過(guo)，提(ti)供(gong)測(ce)試數據(ju)下面是安森(sen)美ESD5481MUT5G，用在一(yi)般信號線上(shang)的(de)(de)ESD管(guan)規格(ge)書(shu)提(ti)供(gong)的(de)(de)信息，人家一(yi)個(ge)小管(guan)子，完成(cheng)了三(san)個(ge)標(biao)(biao)準(zhun)的(de)(de)測(ce)試。P4KE、P6KE、1.5KE系列(lie)中(zhong)的(de)(de)數字擊穿(chuan)電壓標(biao)(biao)稱值（VBR）。

反(fan)向擊(ji)(ji)(ji)穿(chuan)(chuan)(chuan)性(xing)PN結加反(fan)向電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)時(shi)(shi)(shi)，空間電(dian)(dian)(dian)(dian)(dian)荷區變寬，區中(zhong)電(dian)(dian)(dian)(dian)(dian)場(chang)(chang)(chang)增強。反(fan)向電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)增大(da)到(dao)一(yi)定程(cheng)度(du)時(shi)(shi)(shi)，反(fan)向電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)將突然增大(da)。如果外電(dian)(dian)(dian)(dian)(dian)路(lu)不能(neng)限制電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)，則電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)會(hui)大(da)到(dao)將PN結燒毀。反(fan)向電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)突然增大(da)時(shi)(shi)(shi)的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)稱擊(ji)(ji)(ji)穿(chuan)(chuan)(chuan)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)。基本的(de)(de)(de)(de)(de)擊(ji)(ji)(ji)穿(chuan)(chuan)(chuan)機(ji)構(gou)有(you)(you)兩種(zhong)，即隧道擊(ji)(ji)(ji)穿(chuan)(chuan)(chuan)（也叫齊納擊(ji)(ji)(ji)穿(chuan)(chuan)(chuan)）和雪(xue)崩擊(ji)(ji)(ji)穿(chuan)(chuan)(chuan)，前者擊(ji)(ji)(ji)穿(chuan)(chuan)(chuan)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)小于(yu)6V，有(you)(you)負的(de)(de)(de)(de)(de)溫度(du)系數(shu)，后者擊(ji)(ji)(ji)穿(chuan)(chuan)(chuan)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)大(da)于(yu)6V，有(you)(you)正(zheng)的(de)(de)(de)(de)(de)溫度(du)系數(shu)。雪(xue)崩擊(ji)(ji)(ji)穿(chuan)(chuan)(chuan)：阻(zu)擋層中(zhong)的(de)(de)(de)(de)(de)載流(liu)(liu)(liu)子(zi)(zi)漂(piao)移速度(du)隨內部電(dian)(dian)(dian)(dian)(dian)場(chang)(chang)(chang)的(de)(de)(de)(de)(de)增強而相應加快(kuai)到(dao)一(yi)定程(cheng)度(du)時(shi)(shi)(shi)，其動能(neng)足以把(ba)束(shu)縛在共(gong)價鍵(jian)中(zhong)的(de)(de)(de)(de)(de)價電(dian)(dian)(dian)(dian)(dian)子(zi)(zi)碰撞(zhuang)出(chu)來(lai)，產(chan)(chan)生自(zi)由電(dian)(dian)(dian)(dian)(dian)子(zi)(zi)—空穴對，新產(chan)(chan)生的(de)(de)(de)(de)(de)載流(liu)(liu)(liu)子(zi)(zi)在強電(dian)(dian)(dian)(dian)(dian)場(chang)(chang)(chang)作(zuo)用(yong)下，再去碰撞(zhuang)其它中(zhong)性(xing)原(yuan)子(zi)(zi)，又產(chan)(chan)生新的(de)(de)(de)(de)(de)自(zi)由電(dian)(dian)(dian)(dian)(dian)子(zi)(zi)—空穴對，如此連鎖(suo)反(fan)應，使阻(zu)擋層中(zhong)的(de)(de)(de)(de)(de)載流(liu)(liu)(liu)子(zi)(zi)數(shu)量急劇增加，像雪(xue)崩一(yi)樣。雪(xue)崩擊(ji)(ji)(ji)穿(chuan)(chuan)(chuan)發生在摻(chan)雜(za)濃度(du)較(jiao)低的(de)(de)(de)(de)(de)PN結中(zhong)，阻(zu)擋層寬，碰撞(zhuang)電(dian)(dian)(dian)(dian)(dian)離的(de)(de)(de)(de)(de)機(ji)會(hui)較(jiao)多，雪(xue)崩擊(ji)(ji)(ji)穿(chuan)(chuan)(chuan)的(de)(de)(de)(de)(de)擊(ji)(ji)(ji)穿(chuan)(chuan)(chuan)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)高。TVS按用(yong)途可分為各種(zhong)電(dian)(dian)(dian)(dian)(dian)路(lu)都適(shi)用(yong)的(de)(de)(de)(de)(de)通用(yong)型(xing)器件(jian)和特殊電(dian)(dian)(dian)(dian)(dian)路(lu)適(shi)用(yong)的(de)(de)(de)(de)(de)型(xing)器件(jian)。吉林8000W瞬態抑制二極管(guan)失效

雙向TVS可在正反(fan)兩個方向吸收瞬(shun)時大脈沖(chong)功率，并把(ba)電壓箝制到預(yu)定水(shui)平(ping)。重慶SMA瞬(shun)態抑制二極管電壓

TVS是一種二極管(guan)形式(shi)的(de)(de)(de)(de)(de)高(gao)(gao)效(xiao)能(neng)(neng)保護(hu)器(qi)件。當(dang)TVS二極管(guan)的(de)(de)(de)(de)(de)兩(liang)極受到反向瞬(shun)態高(gao)(gao)能(neng)(neng)量(liang)沖擊時，它能(neng)(neng)以(yi)10的(de)(de)(de)(de)(de)負12次方秒量(liang)級(ji)的(de)(de)(de)(de)(de)速度，將其兩(liang)極間的(de)(de)(de)(de)(de)高(gao)(gao)阻抗變為低阻抗，吸收高(gao)(gao)達數千瓦的(de)(de)(de)(de)(de)浪涌(yong)功(gong)率，使(shi)兩(liang)極間的(de)(de)(de)(de)(de)電(dian)(dian)壓(ya)箝位于一個預定值，有(you)(you)效(xiao)地保護(hu)電(dian)(dian)子(zi)線路(lu)中的(de)(de)(de)(de)(de)精(jing)密(mi)元器(qi)件，免受各種浪涌(yong)脈沖的(de)(de)(de)(de)(de)損壞(huai)(huai)。由于它具有(you)(you)響(xiang)應(ying)速度快(kuai)、瞬(shun)態功(gong)率大、漏電(dian)(dian)流低、擊穿電(dian)(dian)壓(ya)偏差小、箝位電(dian)(dian)壓(ya)較易控(kong)制、無損壞(huai)(huai)極限、體積小等優點，被廣(guang)泛應(ying)用(yong)于各類(lei)電(dian)(dian)子(zi)電(dian)(dian)路(lu)中浪涌(yong)保護(hu)或靜電(dian)(dian)保護(hu)。重(zhong)慶SMA瞬(shun)態抑(yi)制二極管(guan)電(dian)(dian)壓(ya)

上海來明電(dian)(dian)(dian)(dian)子(zi)(zi)(zi)(zi)有限(xian)公(gong)司成(cheng)立于2010-08-11，同(tong)(tong)時啟(qi)動了(le)(le)以晶導微電(dian)(dian)(dian)(dian)子(zi)(zi)(zi)(zi),意昇,美(mei)碩,成(cheng)鎬為主的(de)TVS、ESD、MOV，放(fang)電(dian)(dian)(dian)(dian)管(guan)(guan)、保(bao)險(xian)(xian)(xian)絲(si)、繼電(dian)(dian)(dian)(dian)器(qi)(qi)，二(er)三(san)極(ji)(ji)管(guan)(guan)MOS管(guan)(guan)、晶振(zhen)，NTC，PPTC，電(dian)(dian)(dian)(dian)容(rong)產(chan)業(ye)(ye)布(bu)局。是具有一定實(shi)力(li)(li)的(de)電(dian)(dian)(dian)(dian)子(zi)(zi)(zi)(zi)元(yuan)器(qi)(qi)件企(qi)業(ye)(ye)之一，主要提供(gong)TVS、ESD、MOV，放(fang)電(dian)(dian)(dian)(dian)管(guan)(guan)、保(bao)險(xian)(xian)(xian)絲(si)、繼電(dian)(dian)(dian)(dian)器(qi)(qi)，二(er)三(san)極(ji)(ji)管(guan)(guan)MOS管(guan)(guan)、晶振(zhen)，NTC，PPTC，電(dian)(dian)(dian)(dian)容(rong)等領域內的(de)產(chan)品或(huo)服務(wu)。我們(men)強化(hua)內部(bu)資源整合與業(ye)(ye)務(wu)協同(tong)(tong)，致力(li)(li)于TVS、ESD、MOV，放(fang)電(dian)(dian)(dian)(dian)管(guan)(guan)、保(bao)險(xian)(xian)(xian)絲(si)、繼電(dian)(dian)(dian)(dian)器(qi)(qi)，二(er)三(san)極(ji)(ji)管(guan)(guan)MOS管(guan)(guan)、晶振(zhen)，NTC，PPTC，電(dian)(dian)(dian)(dian)容(rong)等實(shi)現(xian)一體化(hua)，建立了(le)(le)成(cheng)熟的(de)TVS、ESD、MOV，放(fang)電(dian)(dian)(dian)(dian)管(guan)(guan)、保(bao)險(xian)(xian)(xian)絲(si)、繼電(dian)(dian)(dian)(dian)器(qi)(qi)，二(er)三(san)極(ji)(ji)管(guan)(guan)MOS管(guan)(guan)、晶振(zhen)，NTC，PPTC，電(dian)(dian)(dian)(dian)容(rong)運(yun)營及風險(xian)(xian)(xian)管(guan)(guan)理體系，累積(ji)了(le)(le)豐富的(de)電(dian)(dian)(dian)(dian)子(zi)(zi)(zi)(zi)元(yuan)器(qi)(qi)件行業(ye)(ye)管(guan)(guan)理經驗，擁有一大批專業(ye)(ye)人才(cai)。來明電(dian)(dian)(dian)(dian)子(zi)(zi)(zi)(zi)始終保(bao)持(chi)在(zai)電(dian)(dian)(dian)(dian)子(zi)(zi)(zi)(zi)元(yuan)器(qi)(qi)件領域優先(xian)的(de)前提下，不斷優化(hua)業(ye)(ye)務(wu)結構。在(zai)TVS、ESD、MOV，放(fang)電(dian)(dian)(dian)(dian)管(guan)(guan)、保(bao)險(xian)(xian)(xian)絲(si)、繼電(dian)(dian)(dian)(dian)器(qi)(qi)，二(er)三(san)極(ji)(ji)管(guan)(guan)MOS管(guan)(guan)、晶振(zhen)，NTC，PPTC，電(dian)(dian)(dian)(dian)容(rong)等領域承攬(lan)了(le)(le)一大批高精尖(jian)項目，積(ji)極(ji)(ji)為更多電(dian)(dian)(dian)(dian)子(zi)(zi)(zi)(zi)元(yuan)器(qi)(qi)件企(qi)業(ye)(ye)提供(gong)服務(wu)。

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