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The IS31FL3731 is a compact LED driver for 144

single LEDs. The device can be programmed via an

I2C compatible 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.

IS31FL3731 is available in QFN-28 (4mm × 4mm) and

SSOP-28 package. It operates from 2.7V to 5.5V over

the temperature range of -40°C to +85°C.