概觀
IS31FL3235A is comprised of 28 constant current
channels each with independent PWM control,
designed for driving LEDs, PWM frequency can be
3kHz or 22kHz. The output current of each channel
can be set at up to 38mA (Max.) by an external resistor
and independently scaled by a factor of 1, 1/2, 1/3 and
1/4. 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.
IS31FL3235A is available in QFN-36 (4mm × 4mm)
package. It operates from 2.7V to 5.5V over the
temperature range of -40°C to +85°C.