Thursday, August 26, 2010

Low-Voltage Current Sink Controls High-Voltage LED String

Portable displays using white LED backlights also need auxiliary LED lighting, an inductive boost to maximize backlight efficiency, a charge pump to allow independent control of each auxiliary LED, and programmable current sinks to control color and brightness. This tip shows how a programmable LED driver and low-cost boost converter can achieve a flexible, high-efficiency, easy-to-program solution.


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