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(tou)使(shi)用壽命(ming)的影響：

    瞬(shun)(shun)態(tai)(tai)過(guo)(guo)流(liu)事(shi)情(qing)是指流(liu)過(guo)(guo)大(da)(da)(da)功率LED燈具(ju)(ju)的(de)電(dian)(dian)(dian)流(liu)超越該大(da)(da)(da)功率LED燈具(ju)(ju)技術數據(ju)手冊中的(de)*大(da)(da)(da)額定(ding)電(dian)(dian)(dian)流(liu)，這可(ke)能是由于大(da)(da)(da)電(dian)(dian)(dian)流(liu)直接(jie)產生也可(ke)能是由高電(dian)(dian)(dian)壓(ya)間(jian)接(jie)產生，如瞬(shun)(shun)態(tai)(tai)雷擊、開關(guan)電(dian)(dian)(dian)源的(de)瞬(shun)(shun)態(tai)(tai)開關(guan)噪聲、電(dian)(dian)(dian)網動搖等過(guo)(guo)壓(ya)事(shi)情(qing)惹(re)起(qi)的(de)過(guo)(guo)流(liu)。這些事(shi)情(qing)都是瞬(shun)(shun)態(tai)(tai)的(de)，持(chi)續時間(jian)極(ji)短，通常(chang)我們將其(qi)稱為尖峰，如“電(dian)(dian)(dian)流(liu)尖峰”、“電(dian)(dian)(dian)壓(ya)尖峰”.形(xing)成瞬(shun)(shun)態(tai)(tai)過(guo)(guo)流(liu)事(shi)情(qing)的(de)狀況還包括大(da)(da)(da)功率LED燈具(ju)(ju)接(jie)通電(dian)(dian)(dian)源，或是帶(dai)電(dian)(dian)(dian)插拔時的(de)瞬(shun)(shun)態(tai)(tai)過(guo)(guo)電(dian)(dian)(dian)流(liu)。大(da)(da)(da)功率LED燈具(ju)(ju)遭受過(guo)(guo)電(dian)(dian)(dian)沖擊后(hou)的(de)失效形(xing)式并(bing)非固定(ding)，但通常(chang)會(hui)招(zhao)(zhao)致(zhi)焊接(jie)線損(sun)壞，這種損(sun)壞通常(chang)由極(ji)大(da)(da)(da)的(de)瞬(shun)(shun)態(tai)(tai)過(guo)(guo)電(dian)(dian)(dian)流(liu)惹(re)起(qi)。除了招(zhao)(zhao)致(zhi)焊接(jie)線燒斷外，還可(ke)能招(zhao)(zhao)致(zhi)靠近焊接(jie)線的(de)其(qi)他局部損(sun)壞。

2、靜電放(fang)電對LED燈頭(tou)使用壽(shou)命的影響：

      靜(jing)電(dian)(dian)(dian)(dian)放(fang)電(dian)(dian)(dian)(dian)（ESD）損(sun)壞是(shi)(shi)目前高(gao)集成度(du)半導體器件制(zhi)造、運輸和(he)(he)應用中*為常見的(de)(de)一(yi)種(zhong)瞬態過壓危害，而(er)大(da)(da)功(gong)(gong)率(lv)(lv)LED燈具(ju)照明(ming)系統(tong)則須滿足(zu)IEC61000-4-2規(gui)范的(de)(de)“人體靜(jing)電(dian)(dian)(dian)(dian)放(fang)電(dian)(dian)(dian)(dian)形式”8kV接(jie)(jie)觸放(fang)電(dian)(dian)(dian)(dian)，以避免系統(tong)在靜(jing)電(dian)(dian)(dian)(dian)放(fang)電(dian)(dian)(dian)(dian)時有可(ke)能(neng)招(zhao)致的(de)(de)過電(dian)(dian)(dian)(dian)沖擊(ji)失(shi)(shi)效(xiao)。LEDPN結(jie)陣列性(xing)能(neng)將呈現(xian)降低或損(sun)壞。ESD事情(qing)放(fang)電(dian)(dian)(dian)(dian)通(tong)路招(zhao)致的(de)(de)大(da)(da)功(gong)(gong)率(lv)(lv)LED燈具(ju)的(de)(de)芯片內(nei)部(bu)失(shi)(shi)效(xiao)，這種(zhong)失(shi)(shi)效(xiao)可(ke)能(neng)只是(shi)(shi)部(bu)分功(gong)(gong)用損(sun)壞，嚴重的(de)(de)話也(ye)會(hui)招(zhao)致大(da)(da)功(gong)(gong)率(lv)(lv)LED燈具(ju)永(yong)世損(sun)壞。關于接(jie)(jie)近80%能(neng)量(liang)都(dou)轉化為熱(re)量(liang)的(de)(de)大(da)(da)功(gong)(gong)率(lv)(lv)LED燈具(ju)照明(ming)設計而(er)言，熱(re)管理(li)和(he)(he)毛病過熱(re)維(wei)護是(shi)(shi)其面臨的(de)(de)一(yi)個應戰。理(li)論和(he)(he)理(li)論都(dou)曾經(jing)證(zheng)明(ming)，大(da)(da)功(gong)(gong)率(lv)(lv)LED燈具(ju)的(de)(de)性(xing)能(neng)和(he)(he)壽命(ming)(ming)是(shi)(shi)與(yu)大(da)(da)功(gong)(gong)率(lv)(lv)LED燈具(ju)的(de)(de)PN結(jie)工(gong)作溫(wen)度(du)嚴密相關。當大(da)(da)功(gong)(gong)率(lv)(lv)LED燈具(ju)芯片內(nei)結(jie)溫(wen)升(sheng)高(gao)10℃，光通(tong)量(liang)就(jiu)(jiu)會(hui)衰減(jian)1%,大(da)(da)功(gong)(gong)率(lv)(lv)LED燈具(ju)的(de)(de)壽命(ming)(ming)就(jiu)(jiu)會(hui)減(jian)少50%.