概觀
IS32FL3237 is an LED driver with 36 constant current
channels. Each channel can be pulse width modulated
(PWM) by 16 bits for smooth LED brightness control.
In addition, each channel has an 8-bit output current
control register which allows fine tuning the current for
rich RGB color mixing, e.g., a pure white color LED
application. The maximum output current of each
channel is designed to be 38mA, which can be
adjusted by one 8-bit global control register.
Proprietary programmable algorithms are used in
IS32F3237 to minimize audible noise caused by the
MLCC decoupling capacitor. All registers can be
programmed via a high speed I2C (1MHz).
IS32F3237 can be turned off with minimum current
consumption by either pulling the SDB pin low or by
using the software shutdown feature.
IS32FL3237 is available in eTQFP-48 package. It
operates from 2.7V to 5.5V over the temperature range
of -40°C to +125°C.
TYPICAL APPLICATION CIRCUIT
*Note 1
5V.