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GPS接口浪涌靜電保護方案設計圖及防護器件選型詳解

從東(dong)(dong)(dong)沃(wo)GPS接口浪(lang)涌(yong)(yong)靜(jing)(jing)電(dian)(dian)(dian)保(bao)護方案設(she)計圖可(ke)知，東(dong)(dong)(dong)沃(wo)電(dian)(dian)(dian)子技(ji)術從兩個方面進(jin)(jin)行(xing)浪(lang)涌(yong)(yong)靜(jing)(jing)電(dian)(dian)(dian)防(fang)(fang)(fang)護：一個是對(dui)內饋(kui)直流(liu)(liu)電(dian)(dian)(dian)源(yuan)進(jin)(jin)行(xing)浪(lang)涌(yong)(yong)防(fang)(fang)(fang)護，另(ling)一個是對(dui)射頻信(xin)號進(jin)(jin)行(xing)防(fang)(fang)(fang)護。一級電(dian)(dian)(dian)源(yuan)防(fang)(fang)(fang)護，東(dong)(dong)(dong)沃(wo)技(ji)術推(tui)薦選(xuan)用(yong)(yong)半導體(ti)放電(dian)(dian)(dian)管(guan)P0080SC，用(yong)(yong)于吸收雷(lei)擊或(huo)大浪(lang)涌(yong)(yong)電(dian)(dian)(dian)流(liu)(liu)。饋(kui)電(dian)(dian)(dian)部分防(fang)(fang)(fang)護選(xuan)用(yong)(yong)單向瞬(shun)態抑制(zhi)TVS二(er)極(ji)(ji)管(guan)SMBJ6.0A和肖特基二(er)極(ji)(ji)管(guan)B0520W，可(ke)有效保(bao)護后端LDO芯片免受浪(lang)涌(yong)(yong)的(de)沖擊。二(er)級信(xin)號接口選(xuan)用(yong)(yong)東(dong)(dong)(dong)沃(wo)推(tui)出的(de)ESD靜(jing)(jing)電(dian)(dian)(dian)保(bao)護二(er)極(ji)(ji)管(guan)DW05DLC-B-S，工作電(dian)(dian)(dian)壓(ya)5V、低(di)鉗位電(dian)(dian)(dian)壓(ya)18.3V、低(di)漏電(dian)(dian)(dian)流(liu)(liu)1uA。

 2023-11-27

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