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AAT3192/93: Low-cost, 2/3-channel charge-pump LED drivers

Posted: 08 May 2008 ?? ?Print Version ?Bookmark and Share

Keywords:AAT1239-1 application note? charge-pump LED driver? white LED?

AnalogicTech's AAT3193 evaluation board demonstrates the functionality of the AAT3193 and its application as a white LED driver. The AAT3193 is charge-pump based, current-sink white LED drivers capable of driving one to three LEDs up to 30mA, each. AAT3193 automatically switch between 1x mode and 2x mode to maintain the highest efficiency and optimal LED current accuracy and matching over a wide input voltage range. The AAT3193-1/-2/-3 are programmable with AnalogicTech�s S?Cwire (Simple Serial Control) serial interface. The LED constant current levels are set with 16 steps in 3193-1, 8-steps in 3193-2 and 4-steps in 3193-3. AAT3193-4 uses PWM interface to control LED current by modulating duty cycle of the PWM signal. This document describes the evaluation board and its accompanying user interface.

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