重慶路燈生產廠家:影響LED燈頭使用壽命的因素

1、瞬態過(guo)流對LED燈頭使用壽(shou)命的影響：

    瞬(shun)(shun)(shun)(shun)態(tai)過(guo)(guo)(guo)流(liu)(liu)事情(qing)是(shi)指流(liu)(liu)過(guo)(guo)(guo)大(da)(da)(da)(da)功(gong)(gong)(gong)率LED燈具的(de)電(dian)(dian)流(liu)(liu)超(chao)越該大(da)(da)(da)(da)功(gong)(gong)(gong)率LED燈具技術(shu)數據手冊中的(de)*大(da)(da)(da)(da)額定電(dian)(dian)流(liu)(liu)，這(zhe)可能是(shi)由于(yu)大(da)(da)(da)(da)電(dian)(dian)流(liu)(liu)直接(jie)產(chan)生(sheng)也(ye)可能是(shi)由高電(dian)(dian)壓(ya)間接(jie)產(chan)生(sheng)，如瞬(shun)(shun)(shun)(shun)態(tai)雷擊(ji)(ji)、開(kai)關(guan)(guan)電(dian)(dian)源的(de)瞬(shun)(shun)(shun)(shun)態(tai)開(kai)關(guan)(guan)噪聲、電(dian)(dian)網動(dong)搖等(deng)過(guo)(guo)(guo)壓(ya)事情(qing)惹起的(de)過(guo)(guo)(guo)流(liu)(liu)。這(zhe)些事情(qing)都(dou)是(shi)瞬(shun)(shun)(shun)(shun)態(tai)的(de)，持續(xu)時間極短(duan)，通常我們將(jiang)其(qi)稱為尖(jian)峰(feng)，如“電(dian)(dian)流(liu)(liu)尖(jian)峰(feng)”、“電(dian)(dian)壓(ya)尖(jian)峰(feng)”.形(xing)成瞬(shun)(shun)(shun)(shun)態(tai)過(guo)(guo)(guo)流(liu)(liu)事情(qing)的(de)狀況還(huan)包括大(da)(da)(da)(da)功(gong)(gong)(gong)率LED燈具接(jie)通電(dian)(dian)源，或是(shi)帶電(dian)(dian)插拔時的(de)瞬(shun)(shun)(shun)(shun)態(tai)過(guo)(guo)(guo)電(dian)(dian)流(liu)(liu)。大(da)(da)(da)(da)功(gong)(gong)(gong)率LED燈具遭受(shou)過(guo)(guo)(guo)電(dian)(dian)沖擊(ji)(ji)后的(de)失(shi)效形(xing)式(shi)并非固定，但通常會招致(zhi)焊接(jie)線損壞(huai)(huai)，這(zhe)種損壞(huai)(huai)通常由極大(da)(da)(da)(da)的(de)瞬(shun)(shun)(shun)(shun)態(tai)過(guo)(guo)(guo)電(dian)(dian)流(liu)(liu)惹起。除了招致(zhi)焊接(jie)線燒斷(duan)外，還(huan)可能招致(zhi)靠近焊接(jie)線的(de)其(qi)他局部(bu)損壞(huai)(huai)。

2、靜電放(fang)電對LED燈頭使(shi)用壽命的影響：

      靜(jing)電(dian)(dian)放(fang)(fang)電(dian)(dian)（ESD）損(sun)壞是目前高集成(cheng)度半導(dao)體器件制造、運輸和應用中*為(wei)常見的(de)(de)一(yi)種(zhong)瞬態過壓危(wei)害(hai)，而大(da)(da)功(gong)(gong)率(lv)(lv)LED燈(deng)(deng)具照明系(xi)統(tong)則須(xu)滿(man)足(zu)IEC61000-4-2規范的(de)(de)“人體靜(jing)電(dian)(dian)放(fang)(fang)電(dian)(dian)形式”8kV接觸(chu)放(fang)(fang)電(dian)(dian)，以(yi)避免(mian)系(xi)統(tong)在靜(jing)電(dian)(dian)放(fang)(fang)電(dian)(dian)時有可能(neng)招(zhao)致的(de)(de)過電(dian)(dian)沖擊失效(xiao)。LEDPN結陣列性(xing)能(neng)將(jiang)呈現(xian)降低或損(sun)壞。ESD事情放(fang)(fang)電(dian)(dian)通(tong)路招(zhao)致的(de)(de)大(da)(da)功(gong)(gong)率(lv)(lv)LED燈(deng)(deng)具的(de)(de)芯(xin)片內(nei)部(bu)失效(xiao)，這(zhe)種(zhong)失效(xiao)可能(neng)只是部(bu)分功(gong)(gong)用損(sun)壞，嚴重的(de)(de)話也會(hui)(hui)招(zhao)致大(da)(da)功(gong)(gong)率(lv)(lv)LED燈(deng)(deng)具永世損(sun)壞。關于接近80%能(neng)量都(dou)轉化(hua)為(wei)熱量的(de)(de)大(da)(da)功(gong)(gong)率(lv)(lv)LED燈(deng)(deng)具照明設(she)計而言，熱管理和毛病過熱維護是其(qi)面(mian)臨的(de)(de)一(yi)個應戰。理論(lun)和理論(lun)都(dou)曾經證明，大(da)(da)功(gong)(gong)率(lv)(lv)LED燈(deng)(deng)具的(de)(de)性(xing)能(neng)和壽命是與大(da)(da)功(gong)(gong)率(lv)(lv)LED燈(deng)(deng)具的(de)(de)PN結工作溫度嚴密相關。當(dang)大(da)(da)功(gong)(gong)率(lv)(lv)LED燈(deng)(deng)具芯(xin)片內(nei)結溫升高10℃，光通(tong)量就(jiu)會(hui)(hui)衰減(jian)1%,大(da)(da)功(gong)(gong)率(lv)(lv)LED燈(deng)(deng)具的(de)(de)壽命就(jiu)會(hui)(hui)減(jian)少(shao)50%.