LED陣列的有效的熱管理

　　LED陣列的性能、可靠性和設(shè)計(jì)壽命在很大程度上取決于適當(dāng)?shù)臒峁芾?。本文探討了各種傳導(dǎo)，對(duì)流和輻射技術(shù)，以幫助確保最佳的性能和長(zhǎng)壽命為您的下一個(gè)照明設(shè)計(jì)

　　介紹

　　Bridgelux家族的LED陣列產(chǎn)品提供高性能，結(jié)構(gòu)緊湊，并為通用照明市場(chǎng)性價(jià)比的固態(tài)照明解決方案。這些產(chǎn)品結(jié)合了LED的高效率，壽命和可靠性的好處與許多傳統(tǒng)照明光源的光輸出水平。

　　正如在普瑞LED陣列產(chǎn)品的說(shuō)明書(shū)，一些性能特點(diǎn)的LED陣列產(chǎn)品，包括流量、正向電壓、顏色、和可靠性依賴于溫度。這是所有LED的一個(gè)共同特點(diǎn)，這是半導(dǎo)體技術(shù)的一個(gè)特點(diǎn)。隨著溫度的升高，一些性能參數(shù)經(jīng)歷了暫時(shí)的和可恢復(fù)的變化。隨著溫度的升高，光輸出（或光通量）減小，正向電壓（或VF）減小，色溫轉(zhuǎn)變?yōu)樗{(lán)色。

　　此外，絕對(duì)最大額定值，如最大溫度和最大結(jié)溫，不得超過(guò)。超過(guò)絕對(duì)最大額定值，如在產(chǎn)品數(shù)據(jù)表列，可能不可逆損害產(chǎn)品和導(dǎo)致性能的永久性的變化。。

　　Optimization of performance and reliability in a lighting system using Bridgelux LED Arrays requires proper thermal management. Although a critical design parameter， thermal management is not as difficult as many would believe. Understanding the basics allows every lighting designer to optimize his product and meet specification requirements.

　　This article describes basic thermal management concepts and guidelines for proper use of Bridgelux LED Arrays in a lighting system. Included is an overview of basic heat transfer concepts， a description of a thermal model， a sample calculation using this thermal model， a description of various thermal components， and recommendations for measuring the case temperature of the Bridgelux LED Array to validate the performance of the thermal management solution.