‹
  Öйú°ëµ¼ÌåÕÕÃ÷ÍøÊ×Ò³ > ×ÊѶÖÐÐÄ > ²úÆ·×ÊѶ > ÕýÎÄ
ÃÀ¹ú¹ú¼Ò°ëµ¼Ìå×îÐÂÍƳöпî¸ßÁÁ¶ÈLEDÇý¶¯Æ÷
  Ê±¼ä:2007-11-17  16:09:24    À´Ô´:ÃÀ¹ú¹ú¼Ò°ëµ¼Ìå    ×÷Õß:  ä¯ÀÀ
¡¾×ÖÌ壺´ó ÖРС ¼ò ·±¡¿¡¾Êղء¿¡¾¹Ø±Õ¡¿
‹
      

¡¡¡¡ÃÀ¹ú¹ú¼Ò°ëµ¼Ì幫˾(National Semiconductor Corporation)10ÔÂ24ÈÕÐû²¼ÍƳö¾ßÓÐÂö³å¿í¶Èµ÷ÖÆ(PWM)µ÷¹â¿ØÖƹ¦ÄܵĹ²ÑôµçÁ÷ģʽ¸ßÁÁ¶ÈLEDÇý¶¯Æ÷¡£Õâ¿îÐͺÅΪLM3433µÄLEDÇý¶¯Æ÷ÊÇÃÀ¹ú¹ú¼Ò°ëµ¼ÌåPowerWise¸ßÄÜЧϵÁеÄ×îвúÆ·£¬¿ÉÒÔÇý¶¯¸ß¹¦ÂʸßÁÁ¶ÈµÄLED£¬ÓÈÆäÊÊÓÃÓÚÆÁÄ»±³¹âϵͳ¡¢Í¶Ó°»ú¼°¹Ì̬µçµÆ¡£

¡¡¡¡ÃÀ¹ú¹ú¼Ò°ëµ¼ÌåµÄLM3433 LEDÇý¶¯Æ÷¿ÉÒÔÖ§³Ö¹²Ñô¼«µÄ±³¹âϵͳÉè¼Æ£¬¶ø¹²Ñô¼«Éè¼ÆµÄÓŵãÊÇ¿ÉÒÔ¼ÓÇ¿ÏÔʾÆ÷µÄÉ¢ÈÈÄÜÁ¦£¬Òò´Ë¿ÉΪLED¿ªÍØеÄÓ¦ÓÃÁìÓò£¬ÀýÈ磬´óÆÁÄ»µÄÒº¾§ÏÔʾµçÊÓ»ú±ã¿É²ÉÓÃÎȶ¨¿É¿¿µÄLED¡£´ËÍ⣬ԽÇ÷СÇɵġ°¿Ú´üʽͶӰ»ú¡±Ò²¿ªÊ¼²ÉÓÃLED£¬ÒòΪLED±ÈÄ¿Ç°²ÉÓõij¬¸ßÐÔÄܵÆÅÝÓиü¹ãµÄÉ«Óò£¬¶øÇÒÐÔÄܸü¿É¿¿£¬ÊÙÃü¸ü³¤¡£Luminus¹«Ë¾µÄPhlatLight LEDÊôÓÚÐÂÒ»´úLED²úÆ·£¬ÊÊÓÃÓÚµã¹âÔ´¸ßÁÁ¶ÈµÆ¹âϵͳ¡£ÔÚÃÀ¹ú¹ú¼Ò°ëµ¼Ìåչ̨ÄÚÕ¹³öµÄPhlatLightºìÂÌÀ¶¹âLED¿ÉÒÔÊä³ö³¬¹ý3,000°×¹âÁ÷Ã÷¡£

LM3433LEDÇý¶¯Æ÷µÄ¼¼Êõ¹æ¸ñ

¡¡¡¡ÃÀ¹ú¹ú¼Ò°ëµ¼ÌåµÄLM3433оƬÊÇÒ»¿î¹Ì¶¨µ¼Í¨Ê±¼äµÄDC-DC½µÑ¹ºãÁ÷ÎÈѹÆ÷£¬¿ÉÒÔÊä³ö¸ººã¶¨µçÁ÷À´Çý¶¯¸ß¹¦ÂʸßÁÁ¶ÈµÄLED¡£Êä³ö¸ºµçѹºãÁ÷¿ÉÒÔʹLEDµÄÑô¼«¿ÉÒÔÖ±½ÓÁ¬½Óµ½½ÓµØ²Î¿¼µ×ÅÌ£¬´Ó¶øÌá¸ßÉ¢ÈÈÆ÷µÄÉ¢ÈÈÄÜÁ¦¡£ÓÉÓÚÕâ¿îоƬ²ÉÓý϶̶̹¨µ¼Í¨Ê±¼äµÄ½á¹¹£¬Òò´Ëϵͳ¿ÉÒÔ²ÉÓÃСÇɵÄÍâÖÃÎÞÔ´Ôª¼þ£¬ÎÞÐè¼ÓÉèÊä³öµçÈÝÆ÷¡£´ËÍ⣬Õâ¿îLM3433оƬÉèÓÐÁ½ÖÖµ÷½ÚLEDÁÁ¶ÈµÄµçÁ÷¿ØÖÆģʽ¡£Ä£ÄâµçÁ÷¿ØÖÆģʽ¿ÉÒÔÀûÓÃÊäÈëÐźŵ÷½ÚµçÁ÷£¬ÒÔ±ãΪ²»Í¬Æ·ÅƵÄLEDÌṩ²¹³¥¡£ÁíÒ»µçÁ÷¿ØÖÆģʽÀûÓÃÂß¼­µçƽµ÷¹â¿ØÖÆÊäÈëÐźţ¬ÒÔPWMµÄ¿ØÖÆ·½Ê½¿ØÖÆLEDµÄÁÁ¶È¡£PWMµÄ¿ØÖÆģʽÀûÓò¢Ðпª¹Ø½«LEDÁ¬½ÓÒ»Æ𣬠ÁîPWMµ÷¹â¿ØÖÆƵÂÊ¿ÉÒԸߴï40KHz¡£Õâ¿îоƬ»¹¾ß±¸¹ýÈÈÍ£»ú±£»¤¡¢VCCǷѹËø¶¨¼°Âß¼­µçƽͣ»úģʽµÈÆäËü¹¦ÄÜ¡£

¼Û¸ñ¼°¹©»õ

¡¡¡¡LM3433оƬ²ÉÓÃ24Òý½ÅµÄLLP·â×°£¬LM3433оƬÒÔ1,000¿ÅΪ²É¹ºµ¥Î»£¬µ¥¿Å¼ÛΪ2.25ÃÀÔª£¬ÅúÁ¿¹©»õ¡£

LEDS 2007, ¼ÓÖÝÊ¥µØÑǸçÌṩ   http://www.national.com/news/item/0,1735,1298,00.html



Ò³Ã湦ÄÜ:¡¾·¢±í/²é¿´ ÆÀÂÛ¡¿¡¾ÍƼö¡¿¡¾×ÖÌå:´ó ÖРС ¼ò ·±¡¿¡¾´òÓ¡¡¿¡¾Êղء¿¡¾ä¯ÀÀ:¡¿¡¾¹Ø±Õ¡¿
‹