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PDF IS31FL3731 Data sheet ( Hoja de datos )
| Número de pieza | IS31FL3731 | |
| Descripción | AUDIO MODULATED MATRIX LED DRIVER | |
| Fabricantes | ISSI | |
| Logotipo |  |
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IS31FL3731
AUDIO MODULATED MATRIX LED DRIVER
GENERAL DESCRIPTION
The IS31FL3731 is a compact LED driver for 144
single LEDs. The device can be programmed via an
I2C compatible interface. The IS31FL3731 offers two
blocks each driving 72 LEDs with 1/9 cycle rate. The
required lines to drive all 144 LEDs are reduced to 18
by using the cross-plexing feature optimizing space on
the PCB. Additionally each of the 144 LEDs can be
dimmed individually with 8-bit allowing 256 steps of
linear dimming.
To reduce CPU usage up to 8 frames can be stored
with individual time delays between frames to play
small animations automatically. LED frames can be
modulated with audio signal.
IS31FL3731 is available in QFN-28 (4mm × 4mm) and
SSOP-28 package. It operates from 2.7V to 5.5V over
the temperature range of -40°C to +85°C.
September 2012
FEATURES
Supply voltage range: 2.7V to 5.5V
400kHz I2C-compatible interface
144 LEDs in dot matrix
Individual blink control
8 frames memory for animations
Picture mode and animation mode
Auto intensity breathing during the switching of
different frames
LED frames displayed can be modulated with
audio signal intensity
LED light intensity can be modulated with audio
signal intensity
QFN-28 (4mm × 4mm) and SSOP-28 package
APPLICATIONS
Mobile phones and other hand-held devices for
LED display
LED in home appliances
TYPICAL APPLICATION CIRCUIT
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Figure 1 Typical Application Circuit
Note 1: The IC should be placed far away from the mobile antenna in order to prevent the EMI.
Note 2: The average current of each LED is 3.2mA when REXT = 20kΩ. The LED current can be modulated by the REXT. Please refer to the
detail information in Page 16.
Integrated Silicon Solution, Inc. – www.issi.com
Rev.B, 09/10/2012
1
datasheet pdf - http://www.DataSheet4U.net/
1 page  
IS31FL3731
ABSOLUTE MAXIMUM RATINGS
Supply voltage, VCC
Voltage at any input pin
Maximum junction temperature, TJMAX
Storage temperature range, TSTG
Operating temperature range, TA
-0.3V ~ +5.5V
-0.3V ~ VCC+0.3V
150°C
-65°C ~ +150°C
-40°C ~ +85°C
Note:
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only
and functional operation of the device at these or any other condition beyond those indicated in the operational sections of the specifications is
not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
TA = -40°C ~ +85°C, VCC = 2.7V ~ 5.5V, unless otherwise noted. Typical value is TA = 25°C, VCC = 3.6V.
Symbol
Parameter
Conditions
Min. Typ. Max.
VCC Supply voltage
2.7
ICC
Quiescent
current
power
supply VIN = 0V, without audio input, all LEDs off
2.17
5.5
ISD Shutdown current
IOUT Output current of C1~C9
VSDB = 0V
VSDB = VCC, software shutdown
Matrix display mode without
modulation
audio
0.5
230
34
(Note 1)
5
Current sink
voltage C1~C9
headroom Isink = 270mA (Note 2)
VHR
Current source
voltage C1~C9
headroom Isource = 34mA
400
400
tSCAN Period of scanning (Figure 2)
tSCANOL
Non-overlap blanking
during scan (Figure 2)
time
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106
15
ILED
Average
LED
current
of
each REXT = 20kΩ, PWM in 255 step (Note 3)
3.2
Logic Electrical Characteristics (SDA, SCL, AD)
VIL Logic “0” input voltage
VIH Logic “1” input voltage
VCC = 2.7V
VCC = 5.5V
IIL Logic “0” input current
VINPUT = 0V
IIH Logic “1” input current
VINPUT = VCC
0.4
1.4
5
(Note 4)
5
(Note 4)
Unit
V
mA
μA
mA
mV
µs
µs
mA
V
V
nA
nA
Integrated Silicon Solution, Inc. – www.issi.com
Rev.B, 09/10/2012
5
datasheet pdf - http://www.DataSheet4U.net/
5 Page 
IS31FL3731
Table 7 Address of Frame Register
LED Location
LED Control Register
Matrix A
CA1(C1-1~C1-8)
CA2(C2-1~C2-8)
CA3(C3-1~C3-8)
CA4(C4-1~C4-8)
CA5(C5-1~C5-8)
CA6(C6-1~C6-8)
CA7(C7-1~C7-8)
CA8(C8-1~C8-8)
CA9(C9-1~C9-8)
Matrix B
CB1(C1-9~C1-16)
CB2(C2-9~C2-16)
CB3(C3-9~C3-16)
CB4(C4-9~C4-16)
CB5(C5-9~C5-16)
CB6(C6-9~C6-16)
CB7(C7-9~C7-16)
CB8(C8-9~C8-16)
CB9(C9-9~C9-16)
Matrix A
00h
02h
04h
06h
08h
0Ah
0Ch
0Eh
10h
Matrix B
01h
03h
05h
07h
09h
0Bh
0Dh
0Fh
11h
Blink Control Register
Matrix A
12h
14h
16h
18h
1Ah
1Ch
1Eh
20h
22h
Matrix B
13h
15h
17h
19h
1Bh
1Dh
1Fh
21h
23h
PWM Register
Matrix A
24h ~ 2Bh
34h ~ 3Bh
44h ~ 4Bh
54h ~ 5Bh
64h ~ 6Bh
74h ~ 7Bh
84h ~ 8Bh
94h ~ 9Bh
A4h ~ ABh
Matrix B
2Ch ~ 33h
3Ch ~ 43h
4Ch ~ 53h
5Ch ~ 63h
6Ch ~ 73h
7Ch ~ 83h
8Ch ~ 93h
9Ch ~ A3h
ACh ~ B3h
http://www.DataSheet4U.net/
Figure 8 LED array
Integrated Silicon Solution, Inc. – www.issi.com
Rev.B, 09/10/2012
11
datasheet pdf - http://www.DataSheet4U.net/
11 Page | ||
| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet IS31FL3731.PDF ] | |
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