White LED driver in tiny SC70 package delivers high efficiency and uniform LED brightness
David Kim
Abstract
The LT1937, a white LED driver optimized for driving two to four LEDs from a Li-Ion battery input, is described.
Keywords
White LED driver
LT1937
Introduction
The LT1937 step-up white LED driver is an ideal solution for small battery-powered portable devices such as cellular phones, PDAs and digital cameras. The LT1937 features an internal 36V switch that is capable of driving up to eight LEDs in series, but it is optimized for Li-Ion powered color display backlight applications that use two to four white LEDs. The LT1937 guarantees a constant light intensity and color in each LED, regardless of differences in their ...
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