Maxim MAX16814四路高亮LED驱动方案
Maxim 公司的MAX16814是集成了高压DC/DC控制器的四路高亮LED(HBLED)驱动器,输入电压4.75V-40V,能经受住汽车负载突变,可调输出电流从20mA到150mA,以驱动一到四串LED,开关频率200kHz到2MHz,自适应输出电压以最小化功耗,关断电流小于40uA,主要用在汽车显示屏LED背光,汽车RCL,DRL,前灯和雾灯,建筑物,工业和环境灯照明.本文介绍了MAX16814主要特性,功能框图,典型应用电路以及MAX16814 评估板主要特性,电路图,材料清单和PCB布局图.
The MAX16814 high-efficiency, high-brightness LED (HB LED) driver provides up to four integrated LED current-sink channels. An integrated current-mode switching DC-DC controller drives a DC-DC converter that pro-vides the necessary voltage to multiple strings of HB LEDs. The MAX16814 accepts a wide 4.75V to 40V input voltage range and withstands direct automotive load-dump events. The wide input range allows powering HB LEDs for small to medium-sized LCD displays in automotive and general lighting applications.
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