ESD靜(jing)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)保(bao)護(hu)(hu)器(qi)(qi)件(jian)有什(shen)么(me)(me)作(zuo)用和功(gong)能？怎么(me)(me)選型的(de)？新老電(dian)(dian)(dian)(dian)(dian)(dian)(dian)子工程師們(men)都(dou)知道ESD靜(jing)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)保(bao)護(hu)(hu)二極管主要用于保(bao)護(hu)(hu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)免受靜(jing)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)放(fang)(fang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)（ESD）的(de)損害(hai)。當人體(ti)或其他物體(ti)接觸到(dao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)時，可能會在電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)上產生高(gao)壓放(fang)(fang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)，導致電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)元器(qi)(qi)件(jian)受到(dao)損壞。ESD靜(jing)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)保(bao)護(hu)(hu)二極管通過提供一(yi)個(ge)低(di)阻抗路(lu)徑來吸收這些(xie)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓放(fang)(fang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)，從而保(bao)護(hu)(hu)后(hou)級電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)芯片。ESD靜(jing)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)保(bao)護(hu)(hu)器(qi)(qi)件(jian)在選型時，ESD二極管廠家東沃電(dian)(dian)(dian)(dian)(dian)(dian)(dian)子需(xu)要考慮以下(xia)幾個(ge)方面：

1）反向(xiang)工作(zuo)電(dian)壓(ya)（VRWM）：需要根據電(dian)路(lu)(lu)的需求選(xuan)擇合適(shi)的VRWM，ESD靜(jing)電(dian)保護(hu)器(qi)件反向(xiang)工作(zuo)電(dian)壓(ya)要大于電(dian)路(lu)(lu)中(zhong)的最大工作(zuo)電(dian)壓(ya)。

2）箝位電(dian)壓（VC）：ESD靜電(dian)保護(hu)器件箝位電(dian)壓VC 應小于被保護(hu)芯片所能耐(nai)受的最大峰值電(dian)壓。

3）脈(mo)沖峰值電流（IPP）：要根(gen)據線路上可能出現的最大浪涌電流來選擇合適(shi)IPP。

4）結電(dian)(dian)(dian)容（CJ）：用于(yu)(yu)信(xin)號(hao)傳輸(shu)靜電(dian)(dian)(dian)保護(hu)時(shi)，要注(zhu)意(yi)所(suo)傳輸(shu)信(xin)號(hao)的頻率或(huo)傳輸(shu)速(su)率，當信(xin)號(hao)傳輸(shu)頻率大(da)于(yu)(yu)10MHZ時(shi)，ESD二極管結電(dian)(dian)(dian)容要低于(yu)(yu)60pF；當信(xin)號(hao)傳輸(shu)頻率大(da)于(yu)(yu)100MHZ時(shi)，ESD二極管結電(dian)(dian)(dian)容要低于(yu)(yu)20pF；具體詳情，可咨(zi)詢東(dong)沃電(dian)(dian)(dian)子技術，1對1為您選型。

5）封(feng)裝(zhuang)類型：要根據(ju)電路設計布局及被保(bao)護線路數選(xuan)擇合適的(de)ESD二極管封(feng)裝(zhuang)。東沃電子推出的(de)ESD管封(feng)裝(zhuang)有SOD-882、DFN1006-3L、SOT-523、SOD-523、QFN-10、SOD-123S、SOD-323、 SOT-23、SOT-143、SOT-363、SOT-23-6L等等。

總的(de)來說(shuo)，ESD靜(jing)電(dian)(dian)保(bao)護(hu)(hu)器(qi)件選型需(xu)要根據電(dian)(dian)路情況和保(bao)護(hu)(hu)需(xu)求綜合分析，并選擇合適型號的(de)ESD靜(jing)電(dian)(dian)保(bao)護(hu)(hu)二(er)極(ji)管。接(jie)下來，東沃電(dian)(dian)子要介紹的(de)是一款熱銷ESD靜(jing)電(dian)(dian)保(bao)護(hu)(hu)器(qi)件PESD3V3L2BT-N，也是客戶問得(de)最(zui)多的(de)ESD二(er)極(ji)管。查看東沃電(dian)(dian)子ESD-PESD3V3L2BT-N Datasheet可知：

PESD3V3L2BT-N 靜電保護(hu)器件特性

√ 保護兩條雙向線路
√ 超低漏電流：nA級
√ 低箝位電壓
√ IEC 61000-4-2 (ESD)抗擾度測試 空氣放電:±30kV 接觸放電:±30kV
√ IEC61000-4-4 (EFT) 80A (5/50ns)
√ IEC61000-4-5 (Lightning) 35A (8/20μs)
√ 符合RoHS標準
√ SOT-23封裝

PESD3V3L2BT-N 靜電(dian)保護器件(jian)參數

反向工作電壓：3.3V
擊穿電壓（測試電流1mA）：4V
箝位電壓：10.5V
峰值脈沖電流：35A
峰值脈沖功率：400W
結電容：50pF
漏電流：1uA

由此可知，東沃電子推出的PESD3V3L2BT-N二極管，SOT-23封裝、工作電壓3.3V、峰值脈沖電流35A、鉗位電壓10.5V、結電容50pF，廣泛應用于手機、筆記本、手持設備、便攜式儀器、機頂盒、服務器等產品中。有關ESD靜(jing)電保護器件(jian)PESD3V3L2BT-N價格、交期、現貨等更多信息，可咨詢東沃電子銷售工程師，1對1為您服務：136 7581 6901（微信同號）朱工