112W长串LED boost驱动器的全陶瓷电容方案

本参考设计利用MAX16834构建一个长串LED的大功率驱动器。LED电流由数字电位器调节，能够在驱动多达20个串联LED (总共75V)时提供高达1.5A的电流。为延长工作寿命，输入和输出去耦电容均采用陶瓷电容。


Maxim > App Notes > Display drivers Power-supply circuits
Keywords: LED, boost, string, MAX16834, high voltage, step-up, driver, ceramic capacitors, high-dimming ratio, streetlight, garage lighting Jun 28, 2010

APPLICATION NOTE 4669
112W boost driver for long strings of LEDs using all ceramic capacitors
By: Jim Christensen, Strategic Applications Engineer


Abstract: This reference design uses the MAX16834 to create a high-powered LED driver for a very long string(s) of LEDs. The
LED current is adjustable with a potentiometer, and can be set as high as 1.5A into as many as 20 LEDs (75V total). For long
life, ceramic capacitors are used for both input and output decoupling.

This is a reference design for a 112.5W boost LED driver that uses the MAX16834 for long strings of LEDs. These lo