宽电压大电流驱动器

A711 线性驱动IC的应用优点及使用配合条件.PDF The A711 is a high voltage, low dropout current regulator for high power LED that the maximum output current can be up to 1.1Amp. The output current was decided by an external resistor. The output sink current could be disabled via OE pin. PWM dimming function could also be controlled by OE pin. TO-263 package is available for good power dissipation ability. Build-in thermal protection to prevent the chip from over heat damage, and adequate thermal pad PCB area is required to control the junction temperature below 125°C. 　 Features ?0.8V Output Drop-out Voltage at 1.1Amp. ?1.1Amp. Maximum Output Current. ?Output Current Controlled by External Resisto ?3us Fast Response Output Stage Enable Control. ?Supply Voltage Range 5V~50V. ?Output Driving Voltage Up To 75V. ?TO-252-5L package 　 Applications ?High Power LED Driver ?RGB Full Color Power LED driver ?LCD Monitor/TV LED backlight Driver ?LED Table Lamp Typical Applications A711 线性驱动IC的优点： 1.去除DC/DC一级电路节省成本及提高整机效率，A711模组效率可达98~93% 2.可轻易通过EMC 3.电路元件极少成本低，电路走线简单 4.每路灯条和驱动板只有一条接线，排线少组装容易 5.A711 Vdd 5~ 50V，输出端75V耐压，且封装为TO-220可锁散热片可靠度高 6.A711 有EN Pin 可做各种开关断保护措施，同时有Iset pin 可依各种温度或光耦等元件，配合开关元件作电流的调节变化 在Vdrop电压为3V条件下，烧机1小时，A711（TO263封装）温度只达42度（环境温度28度） 公司网站： http://www.lumen-chip.com