USB Power Delivery ，簡稱(cheng)USB PD，是(shi)由USB-IF組織制定(ding)的(de)(de)一(yi)種快速(su)充電(dian)(dian)(dian)規(gui)(gui)范，目(mu)前主(zhu)流(liu)的(de)(de)快充協議之一(yi)。該規(gui)(gui)范可(ke)實現更高的(de)(de)電(dian)(dian)(dian)壓和電(dian)(dian)(dian)流(liu)，輸(shu)送的(de)(de)功率(lv)最高可(ke)達100瓦，并可(ke)以自(zi)由的(de)(de)改變電(dian)(dian)(dian)力的(de)(de)輸(shu)送方向。在(zai)(zai)日常使用USB PD快充充電(dian)(dian)(dian)器(qi)(qi)時(shi)，需要頻(pin)繁地(di)熱插(cha)拔。如(ru)(ru)果其內(nei)部防護(hu)措施不(bu)(bu)到位的(de)(de)話，不(bu)(bu)僅會導(dao)致(zhi)浪涌(yong)電(dian)(dian)(dian)流(liu)通過(guo)電(dian)(dian)(dian)源線(xian)進入內(nei)部電(dian)(dian)(dian)路(lu)損壞(huai)(huai)主(zhu)控芯片，而且(qie)還容(rong)易(yi)引發輸(shu)出瞬間大電(dian)(dian)(dian)流(liu)，影響(xiang)充電(dian)(dian)(dian)穩定(ding)和安(an)全，甚至導(dao)致(zhi)受充設備損壞(huai)(huai)。不(bu)(bu)僅如(ru)(ru)此，USB PD快充充電(dian)(dian)(dian)器(qi)(qi)和快充移動電(dian)(dian)(dian)源產(chan)品在(zai)(zai)使用中(zhong)，很容(rong)易(yi)與人體或(huo)其他帶(dai)靜(jing)電(dian)(dian)(dian)物體產(chan)生接(jie)(jie)觸，而多數產(chan)品外(wai)殼的(de)(de)殼料與USB端口、呼(hu)吸燈(deng)、按鍵的(de)(de)連接(jie)(jie)處并不(bu)(bu)是(shi)無縫(feng)(feng)設計，外(wai)部靜(jing)電(dian)(dian)(dian)很容(rong)易(yi)通過(guo)接(jie)(jie)縫(feng)(feng)進入主(zhu)板中(zhong)，導(dao)致(zhi)產(chan)品損壞(huai)(huai)。

為此，想要生產出一款穩定安全的USB PD快充產品，其EOS防護/ESD靜電保護措施必不可少。從物料成本、研發周期、生產流程等方面考慮，越來越多的廠商選擇在USB PD快充接口內置浪涌和靜電保護器件。那么，USB PD快充接口浪涌靜電保護選用什么型號的TVS二極管呢？國產品牌東沃電子（DOWOSEMI），一家專業高品質電路保護器件廠家及保護方案服務商，不僅擁有高可靠性的過壓過流保護器件和全面專業的ESD/EOS解決方案，而且還設有EMC測試實驗室，可免費提供浪涌及靜電防護測試及整改服務。

東沃USB PD快(kuai)充接口浪(lang)涌靜電保護(hu)方案圖

東沃USB PD快充(chong)接(jie)口浪涌靜電保護方案說明(ming)

從東(dong)沃(wo)USB PD快(kuai)充(chong)接(jie)(jie)(jie)口(kou)浪涌靜電(dian)(dian)(dian)(dian)(dian)(dian)保(bao)(bao)護方案圖一，電(dian)(dian)(dian)(dian)(dian)(dian)源供(gong)電(dian)(dian)(dian)(dian)(dian)(dian)口(kou)東(dong)沃(wo)電(dian)(dian)(dian)(dian)(dian)(dian)子(zi)選用TVS二(er)極管SD05、SD12C、SD24C做(zuo)防護，具(ju)體(ti)根據充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)大小(xiao)來選擇。SD05C、SD12C、SD24C工作電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)為5V、12V、24V，具(ju)有低鉗位、低漏電(dian)(dian)(dian)(dian)(dian)(dian)流的特點(dian)，適合大浪涌保(bao)(bao)護；SOD-323封裝，減小(xiao)USB PD接(jie)(jie)(jie)口(kou)安(an)裝空間；符合IEC 61000-4-2（靜電(dian)(dian)(dian)(dian)(dian)(dian)）±30kV（空氣）和±30kV（接(jie)(jie)(jie)觸(chu)）標準。在D+/D-數(shu)據接(jie)(jie)(jie)口(kou)和快(kuai)充(chong)協議檢測(ce)CC1/2接(jie)(jie)(jie)口(kou)靜電(dian)(dian)(dian)(dian)(dian)(dian)防護中，東(dong)沃(wo)電(dian)(dian)(dian)(dian)(dian)(dian)子(zi)推(tui)薦選用TVS二(er)極管DW05DUCF-B-E，工作電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)5V、峰值脈沖電(dian)(dian)(dian)(dian)(dian)(dian)流3A、DFN1006-2L封裝；結電(dian)(dian)(dian)(dian)(dian)(dian)容低至0.5pF，保(bao)(bao)證高速數(shu)據信號的傳(chuan)輸；符合IEC 61000-4-2（靜電(dian)(dian)(dian)(dian)(dian)(dian)）±15kV（空氣）和 ±10kV（接(jie)(jie)(jie)觸(chu)）標準。

從(cong)東(dong)沃(wo)USB PD快充(chong)接(jie)口浪(lang)涌靜(jing)電(dian)(dian)保護方案圖二，電(dian)(dian)源供電(dian)(dian)口防護和浪(lang)涌保護器件選型跟(gen)方案一一樣。不同的是，在D+/D-數據(ju)接(jie)口和快充(chong)協(xie)議檢測CC1/2接(jie)口防護中(zhong)，東(dong)沃(wo)電(dian)(dian)子技術推(tui)薦選用集成式雙向TVS二極(ji)管(guan)DWSLC05M，工(gong)作電(dian)(dian)壓5V、峰值脈沖電(dian)(dian)流3.5A、漏電(dian)(dian)流0.1uA、SOT-23封(feng)裝；結電(dian)(dian)容(rong)低至3.5pF，保證信號的完整(zheng)性(xing)；符合IEC 61000-4-2（靜(jing)電(dian)(dian)）±20kV（空氣）和 ±20kV（接(jie)觸）標準。

東沃USB PD快充接口浪涌(yong)靜電(dian)保護器件參數

1）東沃TVS二極管SD05C/SD12C/SD24C參數(shu)

查看(kan)東沃(wo)電(dian)子“ESD-SD05C/SD12C/SD24C Datasheet”規格書可知：

2）東沃TVS二(er)極管DW05DUCF-B-E參數

查看東沃電子“ESD-DW05DUCF-B-E Datasheet”規格書可知：

3）東沃TVS二極管(guan)DWSLC05M參數(shu)

查看(kan)東沃電子“ESD-DWSLC05M Datasheet”規格書可知：

以上是東沃USB PD快充接口浪涌靜電保護經典方案，如有特殊需求，歡迎前來探討。浪涌靜電防護方案，找東沃電子，電路保護不迷路！方案中選用到的TVS二極管SD05C、SD12C、SD24C、DW05DUCF-B-E、DWSLC05M，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。