Maxim MAX16834大功率高亮HB LED驱动方案

Maxim 公司的MAX16834是电流模式大功率高亮度LED(HB LED)驱动器,可组成升压,升-降压,SEPIC和高边降压拓扑.除了用开关PWM控制器驱动N沟功率MOSFET外,还能驱动N沟PWM调光开关. MAX16834输入电压从4.75V 到28V,3000:1 PWM调光/模拟调光,工作频率从100kHz 到1MHz可编程,主要用在单串LED LCD背光,汽车前后照明,精密系统RGB LED光源,DC/DC升压/升-降压转换器等.本文介绍MAX16834主要特性,方框图,多种应用电路以及MAX16834评估板主要特性,电路图,材料清单和PCB元件布局图.

The MAX16834 is a current-mode high-brightness LED (HB LED) driver for boost, boost-buck, SEPIC, and highside buck topologies. In addition to driving an n-channel power MOSFET switch controlled by the switching controller, it also drives an n-channel PWM dimming switch to achieve LED PWM dimming. The MAX16834 integrates all the building blocks necessary to implement a fixed-frequency HB LED driver with wide-range dimming control.
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