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靜電在我們日常生活中，可謂是無處不在，我們身上和周圍環境就帶有很高的靜電電壓。都知道，ESD靜電放電會對電子設備帶來威脅甚至損壞。為此，手機中按鍵部位、接口部位以及觸摸屏等防靜電保護措施是非常有必要的。針對按鍵KEY接口靜電放電問題，電子工程師通常會選用ESD靜電保護二極管為其保駕護航。那麼，用於保護按鍵KEY接口免受靜電浪湧威脅的TVS二極管，該如何選型呢？國產品牌東沃電子是一家專業高品質電路保護器件廠家及保護方案服務商，不僅擁有可靠穩定的電路保護器件和全面專業的EOS/ESD解決方案，而且還設有EMC測試實驗室，免費提供浪湧靜電測試及方案整改服務。接下來，東沃電子要分享的話題是：按鍵KEY接口ESD靜電浪湧保護方案設計圖及TVS二極管選型原則。

按鍵KEY接口(kou)ESD靜電浪湧保護方案設計圖

按鍵KEY接口ESD靜電浪湧保護方案說(shuo)明

從東(dong)沃按(an)鍵KEY接(jie)(jie)口(kou)(kou)ESD靜(jing)電(dian)(dian)(dian)(dian)(dian)(dian)浪湧保(bao)護(hu)方案設(she)計圖(tu)中可以看(kan)出，按(an)鍵控製信號保(bao)護(hu)，東(dong)沃電(dian)(dian)(dian)(dian)(dian)(dian)子技(ji)術推薦選用5顆分(fen)立式(shi)(shi)TVS二(er)極(ji)(ji)管DW05D5BC-B-E或1顆集(ji)成(cheng)(cheng)式(shi)(shi)TVS二(er)極(ji)(ji)管DW05MS-S對按(an)鍵KEY接(jie)(jie)口(kou)(kou)進行(xing)靜(jing)電(dian)(dian)(dian)(dian)(dian)(dian)浪湧防護(hu)。分(fen)立式(shi)(shi)TVS二(er)極(ji)(ji)管DW05D5BC-B-E，工作(zuo)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)5V、峰(feng)值(zhi)脈沖電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)5A、鉗位電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)12V、漏電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)0.2μA、結(jie)(jie)電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)11pF、SOD-523封(feng)裝；符(fu)合(he)IEC 61000-4-2（靜(jing)電(dian)(dian)(dian)(dian)(dian)(dian)）±30kV（空氣(qi)(qi)）和(he) ±30kV（接(jie)(jie)觸）標(biao)準。集(ji)成(cheng)(cheng)式(shi)(shi)ESD二(er)極(ji)(ji)管DW05MS-S，工作(zuo)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)5V、峰(feng)值(zhi)脈沖電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)24A、鉗位電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)13.5V、漏電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)1μA、結(jie)(jie)電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)150pF；SOT-23-6L封(feng)裝，集(ji)成(cheng)(cheng)了4個端口(kou)(kou)保(bao)護(hu)，有效(xiao)減小PCB安(an)裝空間；符(fu)合(he)IEC 61000-4-2（靜(jing)電(dian)(dian)(dian)(dian)(dian)(dian)）±15kV（空氣(qi)(qi)）和(he) ±8kV（接(jie)(jie)觸）標(biao)準。

按鍵KEY接(jie)口ESD靜電保護二極管參數

1）東沃TVS二極管DW05D5BC-B-E參(can)數

查看東沃(wo)電(dian)子「ESD-DW05D5BC-B-E Datasheet」規(gui)格書可知(zhi)：

2）東沃TVS二極(ji)管(guan)DW05MS-S參數

查看東(dong)沃電子「ESD-DW05MS-S Datasheet」規格書可知：

以上是按鍵KEY接口ESD靜電浪湧保護經典方案，如有特殊需求，歡迎前來探討。浪湧靜電防護方案，找東沃電子，電路保護不迷路！方案中選用到的TVS二極管DW05D5BC-B-E和DW05MS-S，東沃電子已全面量產、品質穩定、高可靠性、交期迅速、廠家價格、免費樣品、免費EMC測試、免費選型，歡迎廣大新老客戶前來咨詢：137 5773 6996（微信同號）余工。