基于L6562的单级PFC高效LED恒流电源驱动

设计了由L6562构成将PFC功能与DC-DC功能融合为一体的单级结构的适合LED串列的反激式恒流驱动开关电源。在电网输入与开关驱动电源之间,加入了EMI滤波网络,有效地抑制了电磁干扰对设备的"污染"。前级采用具有RCD吸收电路的反激变换器,提高驱动器的功率因数,并给出了变压器参数设计的方法。

Single-stage PFC Efficient LED Power-driven Based on L6562

This paper designs a suitable LED tandem flyback switching power supply constant current driver,which is constituted by L6562 that is a single-stage structure which Integration ofthe DC-DC function and PFC function.Between the power grid input and switching power driver,join the EMI filter network,effectively suppresses the contamination of the device of electromagnetic interference.The front stage used with RCD snubber flyback converter,to improve the power factor of the drive,and gives the approach of transformer parameter design.