AN2129超催亮度发光二极管的亮度与L6902D

AN2129超催亮度发光二极管的亮度与L6902D

AN2129
APPLICATION NOTE
DIMMING OF SUPER HIGH BRIGHTNESS LEDS
WITH L6902D

1 Introduction
Thanks to the high efficiency and reliability, super high brightness LEDs are becoming more
and more important when compared to conventional light sources. Although LEDs can be sup-
plied directly from a simple voltage source (like battery with resistor), for most applications it
is better to use a switching current source to get not even higher efficiency but also to get a
better light output. This paper will focus on a L6902D based DC/DC converter with dimming
interface. For more details about other converters a