IS31FL3235 Datasheet, PDF (1/13 Pages) Integrated Silicon Solution, Inc – 28 CHANNELS LED DRIVER

IS31FL3235
28 CHANNELS LED DRIVER
October 2014
GENERAL DESCRIPTION
IS31FL3235 is comprised of 28 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 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.
IS31FL3235 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.
FEATURES
 2.7V to 5.5V supply
 I2C interface, automatic address increment
function
 Internal reset register
 Modulate LED brightness with 256 steps PWM
 Each channel can be controlled independently
 Each channel can be scaled independently by 1,
1/2, 1/3 and 1/4
 ESD HBM 8kV
 -40°C to +85°C temperature range
 QFN-36 (4mm × 4mm) package
APPLICATIONS
 Mobile phones and other hand-held devices for
LED display
 LED in home appliances
TYPICAL APPLICATION CIRCUIT
Figure 1 Typical Application Circuit
Note 1: The maximum global output current is set up to 23mA when R_EXT = 3.3kΩ. The maximum global output current can be set by external
resistor, R_EXT. Please refer to the detail information in Page 10.
Note 2: The IC should be placed far away from the mobile antenna in order to prevent the EMI.
Integrated Silicon Solution, Inc. – www.issi.com
1
Rev. B, 10/11/2014