RT8487 High Efficiency BCM LED Driver Controller for High Power Factor Applications



The RT8487 is a Boundary mode high PF floating buck constant LED current output controller with an internal gate driver. The RT8487 features a ZCS detector which keeps system operating in BCM and obtaining excellent power efficiency, better EMI performance. The RT8487 achieves high power factor correction (PFC) and low total harmonic distortion of current (THDi) by a smart internal line voltage compensation circuit which has minimized system component counts; saved both PCB size and total system cost. Especially, the RT8487 can use a cheap simple drum core inductor in the system instead of an EE core to obtain high efficiency. The RT8487 is housed in a TSOT-23-6 package. Thus, the components in the whole LED driver system can be made very compact.

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Evaluate Report 2016/07/05

支持高功率因子脱机应用的高效 BCM LED 驱动控制器


RT8487 含有零电流检测器,可使其系统保持工作在边界临界模式,以获得极佳的转换效率及较好的EMI 性能表现。
借助内部的智能线电压补偿电路,它在系统组件最少化的同时,还可获得高功率因子校正效果和很低的THDi,实现了PCB 占用面积小,总体系统成本很低的优势。
尤其特别的是,RT8487 可支持使用低成本的鼓式电感替代一般常用的EE磁芯电感,并获得很高的效率。
RT8487 采用 TSOT-23-6封装。