led鐨勭儹闃匯�佸鐑郴鏁板拰娓╁害緋繪暟
1銆佷粈涔堟槸鐑樆
鐑樆(Heatresistent) 鏄墿浣撳鐑噺浼犲鐨勯樆紕嶆晥鏋溿�傜儹闃葷殑鍗曚綅涓衡剝/W, 鍗崇墿浣撴寔 緇紶鐑姛鐜囦負(fù)1W鏃訛紝瀵肩儹璺緞涓ょ鐨勬俯宸�?/span>
鐑樆瀹氫箟鐨勫叕寮忎負(fù)
Rth=(Tj-Tx)/P
寮忎腑 Rth鈥斺�?nbsp; 鐑樆錛?/span>
Tj鈥斺�擫ED 鑺墖鐨勭粨娓╋紱 Tx鈥斺�斿埌鏌愮偣鐨勬俯搴︼紱
P鈥斺�斾袱鐐逛箣闂翠紶閫掔殑鐑噺銆?/span>
鍙鐑樆澶т紶鐑殑鏁堟灉灝卞樊銆傞檷浣庤姱鐗囩殑鐑樆鍙粠Rth=d/位A 寰楃煡錛屽浜庢暎鐑殑閫氶亾鏉?璇達(dá)紝闀垮害瓚婄煭瓚婂ソ錛岄潰縐秺澶ц秺濂斤紝
瀵肩儹緋繪暟位瓚婂ぇ瓚婂ソ錛岀幆鑺傝秺灝戣秺濂姐�傜洰鍓嶆暎鐑緝濂界殑 鍔熺巼LED 鐑樆鈮?0鈩?W, 鍥藉唴鎶ラ亾鏈�濂界殑鐑樆鈮?鈩?W, 鍥藉鍙揪鐑樆鈮?鈩?W,
濡傚仛鍒?榪欎釜姘村鉤鍙‘淇濆姛鐜嘗ED 鐨勫鍛姐�?/span>
2銆佸鐑郴鏁?/span>
瀵肩儹緋繪暟 (Heat Transfer Coefficient) 鏄 閲忓鐑兘鍔涚殑鐗╃悊閲忋�傚叾瀹氫箟鏄細(xì)瀵肩儹緋繪暟 鏄寚浼犻�掔儹閲忕殑鐗╄川鍘氬害涓?m 銆侀潰縐負(fù)1m虜,
涓ゅ闈㈢殑娓╁樊涓?鈩冩椂錛屾瘡灝忔椂(h) 閫氳繃鐨勪紶鐑噺錛屽崟浣嶄負(fù)W/mK (璇諱綔錛氱摝姣忕背姣忓紑錛孠 琛ㄧず鐨勬槸寮�姘忔俯搴?,鎴朩/m鈩? 鍥犱負(fù)鍏?宸�?/span>
鏄竴鏍風(fēng)殑銆?/span>
瀵肩儹緋繪暟鍜屾潗鏂欑儹闃葷殑鍏崇郴涓?/span>
Rth=d/ 位A
寮忎腑 Rth鈥?nbsp; 鐑?nbsp; 闃?錛?/span>
d鈥斺�?鏉愭枡鍘氬害錛?/span>
位 鈥?鈥?瀵肩儹緋繪暟錛?nbsp;
A鈥斺�旈潰縐�?/span>
琛ㄦ槑鐑樆涓庡帤搴︽垚姝ｆ瘮錛屼笌瀵肩儹緋繪暟鍜岄潰縐垚鍙嶆瘮銆?/p>
瀵肩儹緋繪暟涓庢潗鏂欑殑緇勬垚緇撴瀯銆佸瘑搴︺�佸惈姘寸巼銆佹俯搴︾瓑鍥犵礌鏈夊叧銆傞潪鏅朵綋緇撴瀯銆佸瘑搴﹁緝浣?鐨勬潗鏂欙紝瀵肩儹緋繪暟杈冨皬銆傛潗鏂欑殑鍚按鐜囬珮銆佹俯搴﹁緝浣庢椂錛屽鐑郴鏁拌緝?yōu)畯銆傞�氬父鎶婂鐑郴鏁板湪 0.05W/m鈩冧互涓嬬殑鏉愭枡縐頒負(fù)楂樻晥淇濇俯鏉愭枡銆?/p>
鍏朵粬甯哥敤鐨勭儹浼犲緋繪暟鍙傝�冨涓嬶細(xì)1070閾濆悎閲?26;1050閾濆悎閲?09;6063閾濆悎閲?01;姘寲閾濋櫠鐡?00;6061閾濆悎閲?55;鍘嬮摳閾?6;姘у寲閾濋櫠鐡?4;瀵肩儹閲戝睘鑳?0锝?4; 瀵肩儹紜呰剛1.5~6;閾濆熀鏉?.8~3;紜呰兌瀵肩儹緇濈紭鍨?.45;瀵肩儹鑳?.8锝?;瀵肩儹鐏屽皝鑳?.6;
鐜哀鏍?wèi)鑴傜殑PCB鏉?.2锝?.8;鐜哀鏍?wèi)鑴?.19;絀烘皵0.03;榪欓噷鍙互鐪嬪埌闄剁摲鍏跺鐑�ц兘姣?閾濆熀鏉胯繕寮?0鍊嶃�?/p>
3銆佹俯搴︾郴鏁?/p>
娓╁害緋繪暟(Temperature Coefficient)鏄寚鍣ㄦ潗鐨勫弬鏁頒笌娓╁害鐨勫叧緋匯�傛娓╁害緋繪暟 (Positive Temperature Coefficient,PTC)琛ㄧず闅忕潃娓╁害鐨勫崌楂樼數(shù)瀛﹀弬鏁板彉澶э紝娉涙寚姝ｆ俯搴?/p>
緋繪暟寰堝ぇ鐨勫崐瀵間綋鏉愭枡銆傝礋鐨勬俯搴︾郴鏁?(Negative Temperature Coeficient,NTC)娉涙寚璐?/p>
娓╁害緋繪暟寰堝ぇ鐨勫崐瀵間綋鏉愭枡鎴栧厓鍣ㄤ歡銆?/p>
甯哥敤鏉愭枡鐨勫鐑郴鏁板鐓ц〃
鏉愭枡 | 紕崇撼綾?/span> | 閽葷煶 | 閾?/span> | 綰摐 | 閲?/span> | 綰摑 | 閾濆悎閲?/span> | 閿?/span> | 閽㈡潗 | 榛勯摐 | 綰搧 | 閿?/span> | 鐜葷拑 | 鐡峰櫒 | 姘?/span> |
瀵肩儹緋繪暟[W/(m 路K] | 6000 | 2300 | 429 | 401 | 315 | 237 | 162 | 121 | 58 | 109 | 80 | 67 | 6.2 | 1.5 | 0.54 |
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