Datasheet Summary
AUDIO MODULATED MATRIX LED DRIVER
September 2012 GENERAL DESCRIPTION The IS31FL3731 is a pact LED driver for 144 single LEDs. The device can be programmed via an I2C patible interface. The IS31FL3731 offers two blocks each driving 72 LEDs with 1/9 cycle rate. The required lines to drive all 144 LEDs are reduced to 18 by using the cross-plexing feature optimizing space on the PCB. Additionally each of the 144 LEDs can be dimmed individually with 8-bit allowing 256 steps of linear dimming. To reduce CPU usage up to 8 frames can be stored with individual time delays between frames to play small animations automatically. LED frames can be modulated with audio signal....
