IS31FL3737 Datasheet, PDF (1/28 Pages) Integrated Silicon Solution, Inc – 12×12 DOTS MATRIX LED DRIVER WITH INDIVIDUAL AUTO BREATH FUNCTION

IS31FL3737
12×12 DOTS MATRIX LED DRIVER
WITH INDIVIDUAL AUTO BREATH FUNCTION
July 2016
GENERAL DESCRIPTION
FEATURES
The IS31FL3737 is a general purpose 12×12 LEDs
matrix driver with 1/12 cycle rate. The device can be
programmed via an I2C compatible interface. Each
LED can be dimmed individually with 8-bit PWM data
which allowing 256 steps of linear dimming.
IS31FL3737 features 3 Auto Breathing Modes which
are noted as ABM-1, ABM-2 and ABM-3. For each
Auto Breathing Mode, there are 4 timing characters
which include current rising / holding / falling / off time
and 3 loop characters which include Loop-Beginning /
Loop-Ending / Loop-Times. Every LED can be
configured to be any Auto Breathing Mode or No-
Breathing Mode individually.
Additionally each LED open and short state can be
detected, IS31FL3737 store the open or short
information in Open-Short Registers. The Open-Short
Registers allowing MCU to read out via I2C
compatible interface. Inform MCU whether there are
LEDs open or short and the locations of open or short
LEDs.
The IS31FL3737 operates from 2.7V to 5.5V and
features a very low shutdown and operational current.
IS31FL3737 is available in QFN-40 (5mm×5mm)
package. It operates from 2.7V to 5.5V over the
temperature range of -40°C to +125°C.
 Supply voltage range: 2.7V to 5.5V
 12 current source outputs for row control
 12 switch current inputs for column scan control
 Up to 144 LEDs (12×12) in dot matrix
 Programmable 12×12 (48 RGBs) matrix size with
de-ghost function
 1MHz I2C-compatible interface
 Selectable 3 Auto Breath Modes for each dot
 Auto Breath Loop Features interrupt pin inform
MCU Auto Breath Loop completed
 Auto Breath offers 128 steps gamma current,
interrupt and state look up registers
 256 steps Global Current Setting
 Individual on/off control
 Individual 256 PWM control steps
 Individual Auto Breath Mode select
 Individual open and short error detect function
 Cascade for synchronization of chips
 QFN-40 (5mm×5mm) package
APPLICATIONS
 Mobile phones and other hand-held devices for
LED display
 Gaming device (Keyboard, Mouse etc.)
 LED in white goods application
TYPICAL APPLICATION CIRCUIT
VCC_5V
*Note2
19
PVCC
VIO/MCU
32
VIO
22μF/10V
0.47μF 0.1μF
26
PVCC
0.47μF
0.47μF 0.1μF
0.47μF 0.1μF
31
VCC
28
CS12
27
CS11
SW12
SW11
VIO/MCU
100kΩ 4.7kΩ 4.7kΩ
Micro
Controller
100kΩ 100kΩ
16
CS2
34
15
SDA
CS1
35
37 ^{SCL IS31FL3737}
INTB
38
14
SDB
SW12
39
13
IICRST
SW11
SW10
SW9
SW8
SW7
SW6
SW5
SW4
REXT
20kΩ
33
SYNC
30
RSET
36
ADDR
40
GND
2
SW2
1
SW1
4,11
PGND
29
AGND
SW3
SW2
SW1
CS1 CS2 CS3 CS4 CS5 CS6 CS7 CS8 CS9 CS10 CS11 CS12
L
K
J
I
H
G
F
E
D
C
B
A
1 2 3 4 5 6 7 8 9 10 11 12
Figure 1 Typical Application Circuit (12×12)
Note 1: For the mobile applications the IC should be placed far away from the mobile antenna in order to prevent the EMI.
Note 2: Electrolytic/Tantalum Capacitor may considerable for high current application to avoid audible noise interference.
Integrated Silicon Solution, Inc. – www.issi.com
1
Rev. A, 07/19/2016