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從(cong)東(dong)(dong)沃(wo)GPS接口(kou)浪涌(yong)靜電(dian)(dian)(dian)(dian)保護方案設(she)計圖可(ke)(ke)知,東(dong)(dong)沃(wo)電(dian)(dian)(dian)(dian)子技(ji)術從(cong)兩(liang)個方面進(jin)行浪涌(yong)靜電(dian)(dian)(dian)(dian)防(fang)護:一(yi)(yi)個是(shi)對(dui)內饋直流電(dian)(dian)(dian)(dian)源(yuan)進(jin)行浪涌(yong)防(fang)護,另一(yi)(yi)個是(shi)對(dui)射頻信(xin)號(hao)進(jin)行防(fang)護。一(yi)(yi)級(ji)電(dian)(dian)(dian)(dian)源(yuan)防(fang)護,東(dong)(dong)沃(wo)技(ji)術推(tui)薦(jian)選(xuan)用(yong)半(ban)導體(ti)放(fang)電(dian)(dian)(dian)(dian)管P0080SC,用(yong)于(yu)吸收雷(lei)擊(ji)或大浪涌(yong)電(dian)(dian)(dian)(dian)流。饋電(dian)(dian)(dian)(dian)部分防(fang)護選(xuan)用(yong)單向(xiang)瞬態(tai)抑(yi)制TVS二(er)極管SMBJ6.0A和肖(xiao)特基二(er)極管B0520W,可(ke)(ke)有效保護后端LDO芯片(pian)免(mian)受浪涌(yong)的(de)(de)沖擊(ji)。二(er)級(ji)信(xin)號(hao)接口(kou)選(xuan)用(yong)東(dong)(dong)沃(wo)推(tui)出的(de)(de)ESD靜電(dian)(dian)(dian)(dian)保護二(er)極管DW05DLC-B-S,工作電(dian)(dian)(dian)(dian)壓(ya)(ya)5V、低鉗位電(dian)(dian)(dian)(dian)壓(ya)(ya)18.3V、低漏電(dian)(dian)(dian)(dian)流1uA。
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