Maxim MAX16834大功率LED驱动方案

Maxim 公司的MAX16834是集成了高边LED电流检测和PWM调光MOSFET驱动器的大功率LED驱动器。这种恒流模式高亮度LED（HBLED）驱动器适合于升压，升-降压，SEPIC和高边降压拓扑。工作电压从.4.75V到28V，PWM调光/模拟调光比3000：1，可编程工作频率100kHz到1MHz，主要应用在单串LED LCD背光，汽车前后灯照明，投映RGB　LED光源，环境照明和DC-DC升压/降压－升压转换器。本文介绍了MAX16834主要特性，方框图以及多种应用电路。

High-Power LED Driver with Integrated High-Side LED Current Sense and PWM Dimming MOSFET Driver

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.

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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