宽输入范围高PF低THD的低系统成本LED驱动电源

Universal Input High PF Low THD LED Driver for Low Cost System

昂宝电子(上海)有限公司最新推出的高PF低THD的LED驱动电源方案OB3619x,能够采用降压(Buck)架构实现高功率因数(PF)、低总谐波(THD)特性,具有极低的系统成本,能够在全电压范围(90~277 Vac)输入均能够满足总谐波(THD)小于15%的要求,获得了客户的认可和好评。从原理分析角度,介绍了降压(Buck)架构在实现低总谐波(THD)的挑战以及该芯片是如何解决架构困难从而实现其低THD特性的。通过内部专利算法实现,该芯片用Buck架构,采用精简的外围零件,可以实现比一般的高PF低THD方案节省15~30%的成本,非常适合在商用LED照明系统上使用。

A noval product, which can achieve high PF and low THD with buck topology on universal input AC range, was release to market by On-Bright Electronics（Shanghai） Co., Ltd. The system using this product can meet THD15% performance at universal input AC（90~264 Vac）. This article analyzes the challenge on THD by using Buck topology and describes the method. This product can solve the issue and achieve good THD performance. By internal patent algorithm, this product use less external components to meet THD spec. The system cost is lower 15%~30% than traditional solution, very suitable for commercial high performance LED lighting application.