è¿ç§ç¯æ¡ç
é¢å®çµåæ¯ç´æµ12Vã
å
¶å®72个LEDçç¯æ¡ï¼æ¯3个LED为ä¸ç»ï¼è¿æä¸ä¸ªéæµçµé»ï¼ï¼å
±24ç»ãè¿24ç»é½æ¯å¹¶èï¼æ以æ¯ä¸ªç¯æ¡ççµåè¿æ¯12V.
LED 5730è¯ççæ£ååéæ¯3.0-3,4Vï¼åä¸é´å¼3,2Vå3.3Vå计ç®ä¸ä¸æ¯ç»ççµæµå¼ï¼
1ãå3.2Vï¼
3个LEDçåé=3.2V X 3 = 9.6V
39欧å§çµé»ä¸çåé =12V -9.6V =2.4V
æ¯ç»çµæµ =2.4V /39æ¬§å§ = 62mA
2ãå3.3.Vï¼
3个LEDçåé=3.3V X 3 = 9.9V
39欧å§çµé»ä¸çåé =12V -9.9V =2.1V
æ¯ç»çµæµ =2.1V /39æ¬§å§ = 54mA
å 为5730çæ£ååéçå·®å¼ï¼æ以计ç®ä¼æåºå
¥ã大约æ¯ç»ççµæµå¨50-60mAå·¦å³ã
ä¸ä¸ª72ç¯ç ç
LEDç¯æ¡çµæµå¼çº¦ä¸º1.2A-1.4Aå·¦å³ã