利用恒流LED驱动器设计高效率LED照明系统

随着高功率LED的问世,照明产业开始面临新的挑战。LED的使用寿命及电源转换效率成为设计LED照明系统时的主要考虑因素。而为了提供恒流(constantcurrent)以维持LED色彩与亮度的一致性,恒流LED驱动器可作为一个提供恒流输出的开关式转换器。此外,省电或是高效率的电源转换需求更是在LED照明应用上不可缺少的要因,而滞后型脉冲频率调制技术(HystereticPFM)可以大幅提升无论在轻载或重载时的电源转换效率。本文将探讨如何利用恒流LED驱动器设计出高效率、高稳定性的LED照明系统。

High-Efficient Constant Current LED Driver for LED Lighting

The lighting industry is facing an evolution, while the development of high power LED is getting mature. Therefore, the life time of LEDs and power efficiency become important issues for LED lighting. LEDs require constant current to maintain constant color performance. Therefore, a constant current LED driver helps extend the life time of LEDs. In addition, the hysteretic PFM scheme maximizes power efficiency across a wide range of loading conditions, which satisfy the need for power saving in LED lighting applications. This article will further discuss how to utilize the advantages of constant current LED drivers to design high efficient and reliable LED lighting systems.