ISSI IS31FL3216 User Manual
IS31FL3216 16 Channels LED Driver Evaluation Board Guide
Integrated Silicon Solution, Inc. – www.issi.com
1
R1.0, 07/12/2012
Description
The IS31FL3216 is a fun light LED controller with an
audio modulation mode. It can store data of 8 frames
with internal RAM to play small animations
automatically.
IS31FL3216 can sample the input signal to modulate
the intensity of LEDs, or control 8 frames playing by
internal ADC block.
The LED current of each channel can be set in 256
steps by adjusting the PWM duty cycle through an I2C
interface.
Features
• Supply voltage range from 2.7V to 5.5V
• I2C interface, automatic address increment
function
• Internal RAM
• Modulate LED brightness with 256 steps PWM
• Each channel can be controlled independently
• Auto Frame Play Mode with 8 frames
• 8 frames memory for animations
• Audio Frame Mode with 8 frames
• 8 of 16 outputs not used as LED drivers can be
used as GPIO ports
• QFN-28 (4mm × 4mm) package
Quick Start
Recommended Equipment
• 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.
Procedure
The IS31FL3216 evaluation board is fully assembled
and tested. Follow the steps to operate.
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) Adjust the input audio signal to obtain best sound
output performance
Figure 1: Photo of IS31FL3216 Evaluation Board
Evaluation Board Ordering Information
Part No. IC Package
IS31FL3216-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.
IS31FL3216 16 Channels LED Driver Evaluation Board Guide
Integrated Silicon Solution, Inc. – www.issi.com
2
R1.0, 07/12/2012
Evaluation Board Operation
The IS31FL3216 evaluation board has nine display
modes. Press MODE button to switch configurations.
1) Music mode: blue LEDs flash from middle to two
sides according to the musical strength.
2) Music mode: blue LEDs flash from left to right;
more strong music, more LEDs on right side will
be turned on.
3) Music mode: blue LEDs flash from right to left with
5 LEDs in one group. Stronger music will make
LEDs move to left.
4) Music mode: the color bars change color
according to the strength of music. Color
change from Blue to Green to Red when music
change from weak to strong.
5) Music mode with AGC disabled: the color bars
flash left to right and right to left, longer with
stronger music. Color change every 6 seconds.
6) Music mode with 6dB gain AGC: color bars flash
left to right and right to left, longer with stronger
music. Color change every 6 seconds.
7) Blue LEDs turn on from right to left with a tailing
visual effect.
8) Blue LEDs turn on from middle to two sides.
9) Push button mode: OUT9~OUT16 as input.
OUT1~OUT8 as output to driver 8 LEDs. Default
is 8 LEDs all on. Press the button on the left will
turn of each corresponding LED.
*Note:
IS31FL3216 solely controls the FxLED function on the
evaluation board.
Software Control
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 IS31FL3216 LED
driver.
Please refer to the datasheet for how to control the IS31FL3216.
IS31FL3216 16 Channels LED Driver Evaluation Board Guide
Integrated Silicon Solution, Inc. – www.issi.com
3
R1.0, 07/12/2012
0.1uF
C8
3V
INTB
SDA
SDB
K9
MODE
G
R
B
10nF
C6
VDD
1
GND
2
SD
3
BP
4
VOUT
5
U2
LDO
1uF
C7
3VVCC
0.1uF
C3 R1
100K
0.22uF
C4
1uF
C2
R4
4.7KR34.7KR24.7K
R5
100K
SCL
INTB
SDA
SDB
SCL
R6
100K
VCC
out1
out2
out3
out4
out5
out6
out7
out8
out9
out10
out11
out12
out13
out14
out15
out16
G
R
B
G
R
B
G
R
B
G
R
B
out1
out2
out3
out4
out5
out6
out7
out8
out9
out10
out11
out12
out13
out14
out15
VCC
D10
D9
D12
D11
D14
D13
D16
D15
D18
D17
D20
D19
D22
D21
D24
D23
out1
out2
out3
out4
out5
out6
out7
out8
out9
out10
out11
out12
out13
out14
out15
out16
D8
out8
D7
out7
D6
out6
D5
out5
D4
out4
D3
out3
D2
out2
D1
out1
K6
R21
100K
R22
1K out14
K5
R19
100K
R20
1K out13
K4
R17
100K
R18
1K out12
K3
R15
100K
R16
1K out11
K2
R13
100K
R14
1K out10
K7
R23
100K
R24
1K out15
K8
R25
100K
R26
1K out16
K1
R11
100K
R12
1K out9
OUT1
3
OUT2
4
OUT3
5
OUT4
6
OUT9
12
OUT10
13
OUT11
14
OUT12
15
GND
7,16
OUT13
17
OUT14
18
OUT15
19
OUT16
20
OUT5
8
OUT6
9
OUT7
10
OUT8
11
CLK
1
SCL
23
SDA
24
VCC
26
INTB
21
SDB
22
AD
25
IN
2
C_FILT
27
R_EXT
28
U1
IS31FL3216
CON1
DC IN
R9
100K
R10
100K
D1
1
G1
2
D2
3
G24S2
5
S2
6
S1
7
S1
8
U5
APM4953
G1
G2
VLED1
VLED2
VLED1
VCC
VLED2
VRGB1
10uFC11uF
C5
P0.0/CMP2/KBI0
1
P1.7
2
P1.6
3
P1.5/RST
4
VSS
5
P3.1/XTAL1
6
P3.0XTAL2/CLKOUT
7
P1.4/INT1
8
P1.3/INT0/SDA
9
P1.2/T0/SCL
10
P1.1/RXD
11
P1.0/TXD
12
P0.7/T1/KBI7
13
P0.6/CMP1/KBI6
14
VDD
15
P0.5/CMPREF/KBI5
16
P0.4/CIN1A/KBI4
17
P0.3/CIN1B/KBI3
18
P0.2/CIN2A/KBI2
19
P0.1/CIN2B/KBI1
20
U3
LPC922
D25
D26
D27
D28
D29
Audio In
TP1
TP2
JP1
OPEN=EXT CTRL
INT
SDB
SCL
SDA
GND
1
2
3
4
5
TP3
G1
G2
G3
G4
P0.5
P0.4
RST
1
2
3
4
5
TP4
ICP
3V
P0.5
P0.4
RST
GND
R7
100KR8100K
D1
1
G1
2
D2
3
G24S2
5
S2
6
S1
7
S1
8
U6
APM4953
G3
G4
VRGB1VCC
SDB1Bypass
2
IN+
3
IN-
4
OUT+
8
GND
7
VDD
6
OUT-
5
U4
IS31AP4991
1uF
C11
0.22uF
C9
Speaker
1uF
C10
VCC
R28
39K
R27
20K
CON3
SPK
Audio In
CON2
AUDIO IN
Figure 2:IS31FL3216 Application Schematic
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