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浪(lang)湧(yong)(yong)靜(jing)電(dian)防護(hu)方(fang)(fang)案設計(ji)中，最(zui)重要(yao)的環(huan)節是要(yao)了(le)解(jie)(jie)分析浪(lang)湧(yong)(yong)電(dian)流(liu)的路徑(jing)，只有(you)了(le)解(jie)(jie)浪(lang)湧(yong)(yong)電(dian)流(liu)路徑(jing)之後，才能夠更(geng)好地給浪(lang)湧(yong)(yong)電(dian)流(liu)搭建(jian)壹條合理的泄放(fang)路徑(jing)。前段時(shi)(shi)間，有(you)客(ke)(ke)戶向東沃電(dian)子求助(zhu)：公司(si)的監控無(wu)線設備GPS接口在過共(gong)模3KA@8/20μs±5T測試時(shi)(shi)，LDO芯片損壞，無(wu)法正常(chang)工作，該怎(zen)麼解(jie)(jie)決(jue)？針對客(ke)(ke)戶這(zhe)個情況，東沃電(dian)子技(ji)術設計(ji)了(le)GPS接口浪(lang)湧(yong)(yong)靜(jing)電(dian)防護(hu)方(fang)(fang)案圖，爲客(ke)(ke)戶電(dian)路安全保駕護(hu)航。

GPS接口(kou)浪湧靜電(dian)保護方案設計圖

GPS接口浪湧靜(jing)電保護方案(an)詳解(jie)

從(cong)東(dong)(dong)沃GPS接口(kou)浪(lang)(lang)湧(yong)靜(jing)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)保(bao)護方案(an)設計圖可(ke)知(zhi)，東(dong)(dong)沃電(dian)(dian)(dian)(dian)(dian)(dian)(dian)子技術從(cong)兩個方面進行浪(lang)(lang)湧(yong)靜(jing)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)防(fang)(fang)護：壹(yi)個是對(dui)內饋(kui)直流電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)進行浪(lang)(lang)湧(yong)防(fang)(fang)護，另壹(yi)個是對(dui)射(she)頻(pin)信號進行防(fang)(fang)護。壹(yi)級電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)防(fang)(fang)護，東(dong)(dong)沃技術推薦選(xuan)用半(ban)導體(ti)放(fang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)管P0080SC，用于(yu)吸收雷擊或大浪(lang)(lang)湧(yong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流。饋(kui)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)部分(fen)防(fang)(fang)護選(xuan)用單向瞬態抑制TVS二極(ji)(ji)管SMBJ6.0A和肖特基二極(ji)(ji)管B0520W，可(ke)有效(xiao)保(bao)護後端LDO芯(xin)片免受(shou)浪(lang)(lang)湧(yong)的(de)沖擊。二級信號接口(kou)選(xuan)用東(dong)(dong)沃推出的(de)ESD靜(jing)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)保(bao)護二極(ji)(ji)管DW05DLC-B-S，工作電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓5V、低鉗(qian)位電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓18.3V、低漏電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流1uA。根(gen)據IEC 61000-4-2標(biao)準，它(ta)可(ke)用于(yu)提供高達±30kV（空(kong)氣放(fang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)）/±30kV（接觸放(fang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)）的(de)ESD保(bao)護，根(gen)據IEC 61000-4-5，可(ke)承受(shou)17A（8/20us）的(de)峰(feng)值脈沖電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流，對(dui)接口(kou)芯(xin)片能(neng)夠提供可(ke)靠的(de)靜(jing)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)和浪(lang)(lang)湧(yong)保(bao)護。ESD二極(ji)(ji)管DW05DLC-B-S結(jie)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)容1PF，能(neng)夠保(bao)證射(she)頻(pin)信號傳輸的(de)完整(zheng)性。

GPS接(jie)口浪湧靜(jing)電保(bao)護器件參(can)數(shu)

1）半導體放電管P0080SC參數

查(cha)看東沃電子“TSS-PxxxxSC Series Datasheet”可(ke)知：

2）TVS二極管SMBJ6.0A參數

查看東沃電子(zi)“TVS-SMBJ Series Datasheet”可知：

3）肖特基二極管B0520W參數

查看東沃電(dian)子“SBD-B0520W Thru B0540W (SOD-123) Datasheet”可知：

4）ESD二極(ji)管DW05DLC-B-S參數

查看東沃(wo)電子“ESD-DW05DLC-B-S Datasheet”可知：

以上是東沃GPS接口浪湧靜電保護方案設計圖，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！方案中選用到的半導體放電管P0080SC、TVS二極管SMBJ6.0A、肖特基二極管B0520W、ESD二極管DW05DLC-B-S，東沃電子已全面量産、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