重慶路燈生產廠家:影響LED燈頭使用壽命的因素

1、瞬態過流對LED燈(deng)頭使(shi)用壽(shou)命的影響(xiang)：

    瞬(shun)(shun)態過(guo)(guo)流(liu)事(shi)情(qing)(qing)是(shi)指(zhi)流(liu)過(guo)(guo)大(da)(da)功率LED燈具(ju)(ju)(ju)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)流(liu)超越(yue)該(gai)大(da)(da)功率LED燈具(ju)(ju)(ju)技術數據手冊中的(de)(de)(de)(de)*大(da)(da)額定電(dian)(dian)(dian)(dian)流(liu)，這(zhe)可能(neng)(neng)是(shi)由(you)于大(da)(da)電(dian)(dian)(dian)(dian)流(liu)直接(jie)產(chan)生也可能(neng)(neng)是(shi)由(you)高(gao)電(dian)(dian)(dian)(dian)壓(ya)間接(jie)產(chan)生，如瞬(shun)(shun)態雷擊(ji)、開關(guan)電(dian)(dian)(dian)(dian)源的(de)(de)(de)(de)瞬(shun)(shun)態開關(guan)噪(zao)聲、電(dian)(dian)(dian)(dian)網動搖等(deng)過(guo)(guo)壓(ya)事(shi)情(qing)(qing)惹(re)起(qi)的(de)(de)(de)(de)過(guo)(guo)流(liu)。這(zhe)些(xie)事(shi)情(qing)(qing)都是(shi)瞬(shun)(shun)態的(de)(de)(de)(de)，持續時(shi)間極短(duan)，通常(chang)我們將(jiang)其稱(cheng)為(wei)尖(jian)峰，如“電(dian)(dian)(dian)(dian)流(liu)尖(jian)峰”、“電(dian)(dian)(dian)(dian)壓(ya)尖(jian)峰”.形(xing)成瞬(shun)(shun)態過(guo)(guo)流(liu)事(shi)情(qing)(qing)的(de)(de)(de)(de)狀況還包括大(da)(da)功率LED燈具(ju)(ju)(ju)接(jie)通電(dian)(dian)(dian)(dian)源，或是(shi)帶(dai)電(dian)(dian)(dian)(dian)插拔時(shi)的(de)(de)(de)(de)瞬(shun)(shun)態過(guo)(guo)電(dian)(dian)(dian)(dian)流(liu)。大(da)(da)功率LED燈具(ju)(ju)(ju)遭受過(guo)(guo)電(dian)(dian)(dian)(dian)沖(chong)擊(ji)后(hou)的(de)(de)(de)(de)失效形(xing)式并非固定，但通常(chang)會(hui)招(zhao)致焊接(jie)線損(sun)壞，這(zhe)種損(sun)壞通常(chang)由(you)極大(da)(da)的(de)(de)(de)(de)瞬(shun)(shun)態過(guo)(guo)電(dian)(dian)(dian)(dian)流(liu)惹(re)起(qi)。除(chu)了(le)招(zhao)致焊接(jie)線燒斷外，還可能(neng)(neng)招(zhao)致靠近焊接(jie)線的(de)(de)(de)(de)其他(ta)局部(bu)損(sun)壞。

2、靜電放電對LED燈頭使(shi)用壽(shou)命(ming)的影(ying)響：

      靜電(dian)(dian)(dian)放電(dian)(dian)(dian)（ESD）損壞(huai)是(shi)目前(qian)高集成(cheng)度半導體器(qi)件(jian)制造、運輸(shu)和應用中*為常見的一(yi)種瞬態過壓危害(hai)，而(er)大(da)(da)(da)功(gong)(gong)(gong)率LED燈(deng)(deng)(deng)具(ju)照明系統(tong)則須(xu)滿足(zu)IEC61000-4-2規范的“人體靜電(dian)(dian)(dian)放電(dian)(dian)(dian)形式”8kV接觸放電(dian)(dian)(dian)，以避(bi)免系統(tong)在(zai)靜電(dian)(dian)(dian)放電(dian)(dian)(dian)時有(you)可(ke)能招致的過電(dian)(dian)(dian)沖擊失(shi)效。LEDPN結(jie)陣列性能將呈現降(jiang)低或(huo)損壞(huai)。ESD事情放電(dian)(dian)(dian)通(tong)(tong)路(lu)招致的大(da)(da)(da)功(gong)(gong)(gong)率LED燈(deng)(deng)(deng)具(ju)的芯片內(nei)部失(shi)效，這種失(shi)效可(ke)能只是(shi)部分(fen)功(gong)(gong)(gong)用損壞(huai)，嚴重的話也會招致大(da)(da)(da)功(gong)(gong)(gong)率LED燈(deng)(deng)(deng)具(ju)永世損壞(huai)。關于接近80%能量都(dou)轉(zhuan)化為熱(re)量的大(da)(da)(da)功(gong)(gong)(gong)率LED燈(deng)(deng)(deng)具(ju)照明設計而(er)言，熱(re)管理(li)和毛(mao)病過熱(re)維護是(shi)其面臨(lin)的一(yi)個應戰。理(li)論(lun)和理(li)論(lun)都(dou)曾經(jing)證明，大(da)(da)(da)功(gong)(gong)(gong)率LED燈(deng)(deng)(deng)具(ju)的性能和壽命(ming)是(shi)與大(da)(da)(da)功(gong)(gong)(gong)率LED燈(deng)(deng)(deng)具(ju)的PN結(jie)工作溫(wen)度嚴密相關。當大(da)(da)(da)功(gong)(gong)(gong)率LED燈(deng)(deng)(deng)具(ju)芯片內(nei)結(jie)溫(wen)升(sheng)高10℃，光通(tong)(tong)量就會衰減(jian)1%,大(da)(da)(da)功(gong)(gong)(gong)率LED燈(deng)(deng)(deng)具(ju)的壽命(ming)就會減(jian)少(shao)50%.