MAXIM MAX16834 大功率LED驱动方案

MAXIM公司的MAX16834是一款电流模式高亮度LED（HB LED）驱动器，具有升压、降压升压、SEPIC、高侧降压拓扑结构。除了通过开关控制器控制驱动n沟道功率MOSFET开关，MAX16834还驱动一个n沟道PWM调光开关实现LED PWM调光。MAX16834工作电压范围为4.75V~28V，包括一个3A沉/源栅极驱动器。MAX16834具有可编程的斜率补偿的恒定频率峰值电流模式控制，以控制PWM控制器的占空比。主要用于单串LED LCD背景光，汽车前后端照明，投影系统RGB LED照明源，建筑和装饰照明(MR16, M111)，场所和环境照明，以及DC-DC升压/降压转换器。本文介绍了MAX16834主要特性、方框图和各种应用电路包括升压LED驱动器, 升-降压LED驱动器,有汽车负载保护的升压LED驱动器以及高侧降压型LED驱动器, 升压型DC-DC转换器和降压-升压型DC-DC转换器。  

The MAX16834 is a current-mode high-brightness LED (HB LED) driver for boost, buck-boost, 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.The MAX16834 features constant-frequency peak current-mode control with programmable slope compensation to control the duty cycle of the PWM controller.
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