36 Channels LED Driver Evaluation Board Guide
Integrated Silicon Solution, Inc. – www.issi.com
1
Rev. A, 11/18/2016
Description
IS31FL3236/IS31FL3236A is comprised of 36 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.
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
•
QFN-44 (5mm × 5mm) package
Quick Start
Recommended Equipment
•
5.0V, 2A power supply
Absolute Maximum Ratings
•
≤
5.5V power supply
Caution: Do not exceed the conditions listed above, otherwise
the board will be damaged.
Procedure
The IS31FL3236/IS31FL3236A evaluation board is
fully assembled and tested. Follow the steps listed
below to verify board operation.
Caution: Do not turn on the power supply until all connections
are completed.
1) Connect the ground terminal of the power supply
to the GND and the positive terminal to the VCC.
Or connect the DC power to the connector (DC
IN).
2) Turn on the power supply and pay attention to the
supply current. If the current exceeds 1.2A,
please check for circuit fault.
3) Enter the desired mode of display by toggling the
MODE button.
Figure 1: Photo of IS31FL3236/IS31FL3236A Evaluation Board
Evaluation Board Ordering Information
Part No.
Package
IS31FL3236-QFLS2-EB
QFN-44, Lead-free
IS31FL3236A-QFLS2-EB QFN-44, Lead-free
Table1: Ordering Information
For pricing, delivery, and ordering information, please contacts ISSI’s analog marketing
team at
or (408) 969-6600.