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AC LED轻引擎的设计更薄的设计和更长的寿命
LED光引擎承诺更长的寿命比白炽灯或紧凑型荧光灯（CFL），理论辐射寿命长达50000小时的基础上。在实践中，通常被认为是必不可少的系统的其他部分，如低压恒流驱动电路和相关的无源器件，往往会降低实际工作寿命。直流LED灯的典型工作寿命约为15000小时。
交流LED，可以从高压线没有驱动程序可以消除通常需要创建一个传统的低压直流驱动器的几个组成部分。消除这些组件，以及它们之间的互连，使AC供电的光引擎提供卓越的可靠性和寿命接近理论LED发光体寿命。
AC-powered LED lighTIng can be built using back-to-back LED strings that are turned on for each alternate cycle of the applied AC waveform. This type of operaTIon can cause the lamp to appear to flicker， parTIcularly if the LEDs are not closely spaced. An alternaTIve approach， using a bridge rectifier and a single IC operating at the line voltage to control the current delivered to the LED array can improve performance without significantly impairing reliability.
The latest AC-powered LED modules from Seoul Semiconductor combine an array of high-voltage Multi-Junction Technology （MJT） LED emitters with the company’s second-generation Acrich2 control IC. This combination enhances reliability， simplifies circuitry， and reduces solution size. Reducing the size of the electronic assembly delivers significant advantages when designing a light engine to meet an established form factor， such as MR-type replacements for 40 W or 60 W incandescent bulbs.
