AN1941低电压LED驱动器使用L6920D，L4971和L6902D

AN1941低电压LED驱动器使用L6920D，L4971和L6902D

AN1941
APPLICATION NOTE
LOW VOLTAGE LED DRIVER USING
L6920D, L4971 AND L6902D

1 INTRODUCTION
High brightness LEDs are becoming a prominent source of light and often have better efficien-
cy and reliability when compared to that of conventional light sources. While LEDs can oper-
ate from an energy source as simple as a battery and resistor, most applications require an
efficient energy source not only for the reduction of losses, but also for the lumen maintenance
of the LED itself. STMicroelectronics has developed the following non-isolated DC-DC con-
stant current LED driver to aid de