IS31FL3730 Audio Modulated Matrix LED Driver Evaluation Board Guide
Description
Recommended Equipment
IS31FL3730 is a LED matrix driver which features an
audio modulation display mode and a general LED dot
matrix display mode. The default configuration of
IS31FL3730 is to drive a single 8×8 LED matrix.
However, IS31FL3730 may be configured to drive
either one or two 8×8, 7×9, 6×10, or 5×11 dot matrix
display(s). The intensity of any matrix picture can be
modulated by an audio signal.
•
•
•
In the general purpose mode, the ON or OFF condition
of each individual LED in the display matrix is
programmed via an I2C interface.
Procedure
Features
•
•
•
•
•
•
•
•
2.7V to 5.5V supply
I2C interface, automatic address increment
function
One-time programming, internal scan
Audio modulated display intensity with digitally
programmable input gain
Internal registers to digitally adjust display
intensity
Modulate LED brightness with 128 different items
in PWM
One address pin with 4 logic levels to allow four
I2C slave addresses
QFN-24 (4mm × 4mm) package
5.0V, 2A power supply
Audio source( i.e. MP3 player, Notebook PC, etc)
8Ω speaker
Absolute Maximum Ratings
•
≤ 5.5V power supply
Caution: Do not exceed the conditions listed above, otherwise
the board will be damaged.
The IS31FL3730 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 an 8Ω speaker to the “SPK” connector.
2)
Connect the audio source to the “AUDIO IN”
connector.
3)
Connect the DC power to the connector (DC IN).
4)
Turn on the power supply and pay attention to the
supply current. If the current exceeds 1A, please
check for circuit fault.
5)
Turn on the audio signal.
6)
Modulation of the audio signal utilized to obtain
better sound output performance
Quick Start
Figure 1: Photo of IS31FL3730 Evaluation Board
Evaluation Board Ordering Information
Part No.
IC Package
IS31FL3730-QFLS2-EB QFN-20, Lead-free
Table1: Ordering Information
For pricing, delivery, and ordering information, please contacts ISSI’s analog marketing
team at analog_mkt@issi.com or (408) 969-6600.
Integrated Silicon Solution, Inc. – www.issi.com
R1.0, 07/12/2012
1
IS31FL3730 Audio Modulated Matrix LED Driver Evaluation Board Guide
Evaluation Board Operation
Software Control
The IS31FL3730 evaluation board has six display
modes. Press MODE button to switch configurations.
1) (Default Mode) A little man is dancing and change
postures according to music rhythm.
2) Display Chinese characters ‘赵,钱,孙,李‘, etc
one by one, then move to left to display more
characters.
3) Display Hart shape, Butterfly, Lock, Little Man, etc
graphics with breathing dimming effect.
4) Flying butterfly.
5) Hart shape animation.
6) Combined shapes animation.
JP1 default setting is close circuit. If it is set to open,
the on-board MCU will stop working. The I2C pins
are set to High Impedance. External I2C signals can
be connected to TP3 to control the IS31FL3730 LED
driver.
Please refer to the datasheet to get more information about
IS31FL3730.
*Note:
IS31FL3730 solely controls the FxLED function on the
evaluation board.
R6
39K
U2
VCC
CON1
DC IN
3V
1
TP1
VDD
VOUT
C8
0.22uF
Audio In
CON2
AUDIO IN
5
U4
R5
20K
4
IN-
VO1
VCC
C1
10uF
C5
1uF
3
SD
2
TP2
GND
C6
10nF
BP
C7
1uF
6
1
C9
1uF
4
7
VO2
VDD
SD
IN+
BYPASS
5
CON3
SPK
8
3
2
GND
C10
1uF
LDO
IS31AP4991
JP1
OPEN=EXT CTRL
U3
3V
1
20
19
18
10
14
3V
K1
MODE
R4
100K
9
3
2
P0.0/CMP2/KBI0
VDD
P0.1/CIN2B/KBI1
P0.2/CIN2A/KBI2
P0.3/CIN1B/KBI3 P0.4/CIN1A/KBI4
P1.2/T0/SCL
P0.5/CMPREF/KBI5
P0.6/CMP1/KBI6
P0.7/T1/KBI7
P1.0/TXD
P1.1/RXD
P1.5/RST
P1.3/INT0/SDA
P1.6
P1.7
P3.1/XTAL1
P1.4/INT1
P3.0XTAL2/CLKOUT
VSS
15
17
16
13
12
11
4
P0.4
P0.5
SDB
SDA
SCL
RST
6
8
7
5
3V
P0.5
P0.4
RST
GND
5
4
3
2
1
VDD
R6/C11
R5
R4
3V
R3
R2
R2
4.7K
R1
SDA
1
SCL
2
SDB
3
C1
SCL
C2
SDB
R3
100K
C4
C5
4
5
C3
0.1uF
D110
D91
D100
D81
D90
D71
D80
D61
D70
D51
D60
D41
D50
D31
D40
D21
D30
D11
D20
ICP
TP3
GND
1
SDA
2
SCL
3
SDB
4
R5
C6
IN
C7
C_FILT
C8
6
20
AD
GND
13 R6
12 R5
R4
10 R4
9 R3
8 R2
10X12 ARRAY
7 R1
R3
SDA
C3
C4
0.22uF
Audio In
D101
U1
11
C2
1uF
R1
4.7K
D120
R6
LPC922
VCC
D111
TP4
R8/C9
R7/C10
24 C1
23 C2
22 C3
21 C4
19 C5
R2
18 C6
17 C7
16 C8
15 C9
14 C10
D1
D10
R1
IS31FL3730
C1
C2
C3
C4
C5
C6
C7
C8
C9
Figure 2:IS31FL3730 Application Schematic
Integrated Silicon Solution, Inc. – www.issi.com
R1.0, 07/12/2012
2
C10
IS31FL3730 Audio Modulated Matrix LED Driver Evaluation Board Guide
Bill of Materials
Name
Symbol
LED Driver
U1
LDO
Description
Qty
Supplier
Part No.
Array FxLED Driver
1
ISSI
IS31FL3730
U2
Low-dropout
1
PAM
PAM3101
MCU
U3
Microcontroller
1
NXP
LPC922
Audio Amplifier
U4
Class-AB Audio Amplifier
1
ISSI
IS31AP4991
Diodes
D1~D120
120
Everlight
19-217/BHC-ZL
1M2RY/3T
Resistors
R1,R2
RES,4.7k,1/16W,±5%,SMD
2
Resistors
R3,R4
RES,100k,1/16W,±5%,SMD
2
Resistor
R5
RES,20k,1/16W,±5%,SMD
1
Resistor
R6
RES,39k,1/16W,±5%,SMD
1
Capacitor
C1
CAP,10µF,16V,±20%,SMD
1
Capacitors
C2,C5,C7,C9,
C10
CAP, 1µF,16V,±20%,SMD
5
Capacitor
C3
CAP, 0.1µF,16V,±20%,SMD
1
Capacitors
C4,C8
CAP, 0.22µF,16V,±20%,SMD
2
Capacitor
C6
CAP,10nF,16V,±20%,SMD
1
Button
K1
Regulator
Diode, LED Blue, SMD
Button
SMD
1
Table 2: Bill of Materials, refer to Figure 2 above.
Integrated Silicon Solution, Inc. – www.issi.com
R1.0, 07/12/2012
3
IS31FL3730 Audio Modulated Matrix LED Driver Evaluation Board Guide
0
0
4
3
2
1
1
2
2
2
1
1
1
2
2
2
2
0
0
Figure 3: Board Component Placement Guide -Top Layer
Figure 4: Board PCB Layout- Top Layer
Integrated Silicon Solution, Inc. – www.issi.com
R1.0, 07/12/2012
4
IS31FL3730 Audio Modulated Matrix LED Driver Evaluation Board Guide
0
0
4
3
2
1
1
2
2
2
1
1
1
2
2
2
2
0
0
Figure 5: Board Component Placement Guide -Bottom Layer
Figure 6: Board PCB Layout-Bottom Layer
Integrated Silicon Solution, Inc. – www.issi.com
R1.0, 07/12/2012
5
IS31FL3730 Audio Modulated Matrix LED Driver Evaluation Board Guide
Copyright © 2011 Integrated Silicon Solution, Inc. All rights reserved. ISSI reserves the right to make changes to this specification
and its products at any time without notice. ISSI assumes no liability arising out of the application or use of any information,
products or services described herein. Customers are advised to obtain the latest version of this device specification before relying
on any published information and before placing orders for products.
Integrated Silicon Solution, Inc. does not recommend the use of any of its products in life support applications where the failure or
malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its safety
or effectiveness. Products are not authorized for use in such applications unless Integrated Silicon Solution, Inc. receives written
assurance to its satisfaction, that:
a.) the risk of injury or damage has been minimized;
b.) the user assume all such risks; and
c.) potential liability of Integrated Silicon Solution, Inc is adequately protected under the circumstances
Integrated Silicon Solution, Inc. – www.issi.com
R1.0, 07/12/2012
6