線xian路lu板ban布bu線xian是shi所suo有you電dian源yuan設she計ji的de基ji礎chu

，布bu線xian良liang好hao的de電dian路lu板ban將jiang有you可ke能neng全quan麵mian提ti升sheng最zui終zhong產chan品pin的de全quan麵mian性xing能neng，這zhe一yi點dian在zai開kai關guan電dian源yuan的de設she計ji中zhong體ti現xian的de尤you為wei明ming顯xian。本ben篇pian文wen章zhang取qu材cai於yu技ji術shu達da人ren的de經jing驗yan總zong結jie
，對dui開kai關guan電dian源yuan中zhong線xian路lu板ban的de線xian間jian距ju關guan鍵jian設she計ji原yuan則ze進jin行xing了le全quan麵mian介jie紹shao。

 

 

為了迎合市場的需求，大多數加工廠的工藝都在不斷進步
，對於目前的工藝來說生產線間距等於甚至小於0.1mm的產品已經不是難事。考慮到開關電源所采用的元器件及生產工藝，一般雙麵板最小線間距設為0.3mm
，單麵板最小線間距設為0.5mm，焊盤與焊盤、焊盤與過孔或過孔與過孔
，最小間距設為0.5mm，可避免在焊接操作過程中出現“橋接”現象。

 

zaizhegebiaozhunzhixia
，henduozhibanchangdounenggoufeichangqingsongdedadaoshichangdeshengchanyaoqiu
，ciwaihainenghendachengdushangtigaochengpinlv。yikeshixianhelidebuxianmidujiyouyigejiaojingjidechengben。zuixiaoxianjianjuzhishihexinhaokongzhidianluhedianyadiyu63V的低壓電路
，當線間電壓大於該值時一般可按照500V/1mm經驗值取線間距。

 

danshizhebingbuyiweizhesuoyoudebiaozhundounengsuiyizhiding
，haiyouyixieyuxianjianjuxiangguanbiaozhunhaishiyaoyangezunshoude，rujiaoliurukouduanzhirongduanqiduanlianxian。mouxiedianyuanduitijiyaoqiuhengao，rumokuaidianyuan。yibanbianyaqishurucexianjianjuwei1mm實踐證明是可行的。對交流輸入
，（隔離）直流輸出的電源產品，比較嚴格的規定為安全間距要大於等於6mm
，當然這由相關的標準及執行方法確定。

 

一yi般ban安an全quan間jian距ju可ke由you反fan饋kui光guang耦ou兩liang側ce距ju離li作zuo為wei參can考kao，原yuan則ze大da於yu等deng於yu這zhe個ge距ju離li。也ye可ke在zai光guang耦ou下xia麵mian印yin製zhi板ban上shang開kai槽cao
，使shi爬pa電dian距ju離li加jia大da以yi滿man足zu絕jue緣yuan要yao求qiu。一yi般ban開kai關guan電dian源yuan交jiao流liu輸shu入ru側ce走zou線xian或huo板ban上shang元yuan件jian距ju非fei絕jue緣yuan的de外wai殼ke
、散熱器間距要大於5mm
，輸出側走線或器件距外殼或散熱器間距要大於2mm，或嚴格按照安全規範執行。

 

ruguochuyujianjubijiaochijindeqingkuang
，jiukeyiyongdaoshangwenzhongtidaodeduixianlubanjinxingkaicaodefangfa。shunbiantiyixia，gaifayechangyonglaibaohufangdianjianxi，changjianyudianshijixianxiangguanweibanhedianyuanjiaoliushuruchu。gaifazaimokuaidianyuanzhongdedaoleguangfandeyingyong，zaiguanfengdetiaojianxiakehuodehenhaodexiaoguo。

 

另一種是采用墊絕緣紙的方法，PCBshejizhongchangjiandejueyuancailiaojunke。yibantongyongdianyuanyongqingkezhihuojuzhimodianzaixianlubanyujinshujikejian，zhezhongcailiaoyoujixieqiangdugao，youyidingkangchaoshidenengli。jusifuyixidingxiangmoyouyujuyounaigaowendetexingzaimokuaidianyuanzhongdedaoguangfandeyingyong。zaiyuanjianhezhouweidaotijianyekedianjueyuanbomolaitigaojueyuankangdianxingneng。

 

需要注意的是，PCB板ban當dang中zhong的de一yi些xie器qi件jian絕jue緣yuan被bei覆fu套tao是shi萬wan萬wan不bu能neng用yong來lai但dan做zuo絕jue緣yuan介jie質zhi的de

，這zhe樣yang會hui導dao致zhi安an全quan距ju離li的de減jian小xiao。在zai高gao溫wen條tiao件jian下xia
，該gai外wai皮pi有you可ke能neng受shou熱re收shou縮suo。大da電dian解jie防fang爆bao槽cao前qian端duan要yao留liu出chu空kong間jian，以yi確que保bao電dian解jie電dian容rong在zai非fei常chang情qing況kuang時shi能neng無wu阻zu礙ai地di瀉xie壓ya。