IS31FL3728 is a general purpose 8×8 LED matrix
driver which features an audio frequency equalizer
(EQ) mode or a general LED dot matrix display mode.
The general LED matrix display defaults to an 8×8
configuration, however, it can be configured for a 5×11,
6×10, 7×9 dot matrix display. The m atrix picture
brightness can be modulated by audio. In either the
audio EQ mode or matrix display mode, the array is
internally scanned, and requires only one-time
programming, thus eliminating the need for real time
system resource utilization.
It programs the LED array through I2C interface. In
the general purpose display mode, each dot of the
LED array is independently programmed on or off over
time. In the audio EQ mode, the X axis (column)
represents the frequency bands while the Y axis (row)
represents the strength of the input audio signal in
each band. The number of LEDs lit in a column is
proportional to the strength of the audio signal in the
corresponding band in a thermometer-coded manner.
IS31FL3728 is available in 24-pin QFN (4mm × 4mm).
It operates from 2.7V to 5.5V over the temperature
range of -40°C to +85°C (IS31FL3728-QFLS2-TR),
-40°C to +105°C (IS31FL3728-QFLS3-TR).