NS LM3429高压75V LED驱动调光解决方案

NS 公司的LM3429是多用途高压 LED驱动器控制器,可以配置成降压,升压,升/降压(Flyback)或SEPIC拓扑,输入和输出的工作电压额定值为75V,内部的PWM控制器可调开关频率高达2MHz.同时还集成了精密的基准电压,用于快速PWM调光的逻辑兼容DIM输入,逐个周期的限流和热关断.本文介绍了LM3429的主要特性, 典型应用电路以及LM2841/2 PWM DC/DC降压稳压器的主要特性,方框图和几种典型应用.同时还介绍了采用LM3429和LM2841/2的升/降压Nuventix参考设计电路图和评估板材料清单(BOM).

The LM3429 is a versatile high voltage LED driver controller.

With the capability to be configured in a Buck, Boost, Buck-Boost (Flyback), or SEPIC topology, and an input and output operating voltage rating of 75V, the LM3429 is ideal for illuminating LEDs in a very diverse, large family of applications.

Adjustable high-side current sense with a typical sense voltage of 100 mV allows for tight regulation of the LED current with the highest efficiency possible. Output LED current regulation is based on peak current-mode control with predictive Off-Time Control. This method of control eases the design of loop compensation while providing inherent input voltage feed-forward compensation.
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