ams has released the AS3661, a new smart LED driver which controls up to nine LEDs to produce sophisticated indicator lighting effects. The IC allows easy command-based programming of all light patterns, whereby three independent program execution engines form three independently programmable LED banks. This means that LED drivers can be grouped based on their function so that, for example, the first bank of drivers could be assigned to keypad illumination, the second bank to ‘funlights’ and the third group to notification LEDs. Each bank can contain from one to nine LED driver outputs; the AS3661 offers nine LED channels in total with up to 25 mA per channel. A dedicated 12-bit PWM for each channel delivers smooth colour transitions.
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