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Eliminating Ghost-Image Currents in Color-LED Display Systems Using the MAX6972–MAX6975 LED Drivers

Authored on: Jan 9, 2008

Technical Paper / Application Note

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Multiplexing light-emitting diode (LED) drivers helps increase efficiency and reduce cost; however, designing multiplexed-LED circuits can be tricky. Improperly designed circuits can lead to undesired LED currents and image artifacts in the application. This application note details the problems associated with multiplexing LEDs and explains how these obstacles can be overcome by utilizing the MAX6972"MAX6975 family of pulse-width-modulated LED drivers for message boards.

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