The IS31FL3732A is a compact LED driver for 144
single LEDs. The device can be programmed via an
I2C compatible interface. The IS31FL3732A 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
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.
IS31FL3732A is available in QFN-40 (5mm×5mm)
package. It operates from 2.7V to 5.5V over the
temperature range of -40°C to +85°C.