概觀
IS31FL3218 is comprised of 18 constant current
channels each with independent PWM control,
designed for driving LEDs. The output current of each
channel can be set at up to 38mA (Max.) by an external
resistor. The average LED current of each channel can
be changed in 256 steps by changing the PWM duty
cycle through an I2C interface.
The chip can be turned off by pulling the SDB pin low or
by using the software shutdown feature to reduce
power consumption. The slave address is fixed “1010
1000”.
IS31FL3218 is available in QFN-24 (4mm × 4mm) and
SOP-24 packages. It operates from 2.7V to 5.5V over
the temperature range of -40°C to +85°C.