IS31AP4832 Dual 2.5W Audio Power Amplifier And Stereo

IS31AP4832 Dual 2.5W Audio Power Amplifier
And Stereo Headphone Driver Evaluation Board Guide
DESCRIPTION
RECOMMENDED EQUIPMENT
The IS31AP4832 is an audio amplifier integrated
circuit capable of delivering 2.5W (Typ.) stereo audio
with tone (bass and treble) control into a 4Ω speaker or
1.7W (Typ.) into an 8Ω speaker with less than 10%
THD from a 5V supply. The IS31AP4832 uses a
2
flexible I C control interface to enable application
features such as 3D enhancement and 13 steps tone
control for headphone and stereo outputs.




ABSOLUTE MAXIMUM RATINGS

≤ 5.5V power supply
Caution: Do not exceed the conditions listed above; otherwise
the board will be damaged.
FEATURES









5.0V, 2A power supply
Audio source (i.e. MP3 player, Notebook PC, etc.)
A pair of speakers (4Ω or 8Ω)
Headphone (32Ω)
Supply voltage 3.0V~5.5V
3D enhancement
Treble and Bass control
I2C control interface
Thermal shutdown protection
Minimum external components
Click-and-Pop suppression
Software & Hardware control shutdown function
QFN-28 (4mm × 4mm) package
PROCEDURE
The IS31AP4832 demo 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)
QUICK START
2)
3)
4)
5)
Connect a pair of 8Ω (or 4Ω) speakers across the
(OUTR+, OUTR-) terminals and (OUTL+, OUTL-)
terminals. Or connect speakers to the RCA
connectors (OUTR, OUTL) or connect a
headphone (32Ω) to the connector (HP Jack).
Connect the ground terminal of the 5V DC power
supply to the GND and the positive terminal to
VCC. Or connect DC power to connector (DC IN).
Connect the audio source to the inputs (INR, INL),
or connect the audio source to the stereo audio
connector AUDIO IN (3.5mm).
Turn on the power supply.
Turn on the audio sources.
Figure 1: Photo of IS31AP4832 Evaluation Board
ORDERING INFORMATION
Part No.
Temperature Range
Package
IS31AP4832-QFLS2-EB
-40°C to +85°C
QFN-28, Lead-free
Table 1: Ordering Information
For pricing, delivery, and ordering information, please contacts ISSI’s analog marketing
team at [email protected] or (408) 969-6600.
Integrated Silicon Solution, Inc. – www.issi.com
Rev. A, 07/21/2013
1
IS31AP4832 Dual 2.5W Audio Power Amplifier
And Stereo Headphone Driver Evaluation Board Guide
4） K3 and K4 Treble Gain. Pressing K3 decreases
gain while pressing K4 increases gain. The
7-segment display above K3 and K4 will show the
gain value. D4 is used to display negative gain.
The treble gain can be adjust from -12dB to +12dB.
Power on default is 0dB.
OPERATION DESCRIPTION
The IS31AP4832 evaluation board has six keys (K1-6)
for controlling the functionality of the IS31AP4832.
1） K6 Board Enable. Pressing this key when the
board is powered will toggle ON/OFF the board
function. D2 will light to show board is active.
2） K5 3D Enable. Pressing this key when the board
is powered will toggle EN/DISABLE of the 3D
function. D1 will light to show 3D function is
enabled.
3） K1 and K2 Bass Gain. Pressing K1 decreases
gain while pressing K2 increases gain. The
7-segment display above K1 and K2 will show the
gain value. D3 will light for a negative gain. The
bass gain can be adjust from -12dB to +12dB.
Power on default is 0dB.
Note: The IS31AP4832 solely controls the Audio function on the
evaluation board.
SOFTWARE SUPPORT
Please refer to the integrated program.
Note: Please refer to the datasheet to get more information
about the IS31AP4832.
U3
K3
KEY3
R14
1K
+
TP2
U2
KEY5
SD
K6
KEY6
LED2
TP10
R13
1K
C17
1uF
R3
20k
1
Left input
VCC
R6
4.7k
SDA
SCL
CON2
AUDIO IN
KEY5 12
KEY6 11
LED1 10
9
SDA1
8
SCL1
HP Test 7
4
RST
SCL
3
2
SDA
R8
100k
C13
16
0.47uF
6
POUTA
NOUTA
3
L3Din
NC
C6
2.2nF
C11
2.2nF
GND
GND
GND
BYPASS
POUTB
VOC
11
13
25
C5
33pF
R2
82k
26
IS31AP4832
23
Right input
Right loop in
NOUTB
I2C Reset
Right tone out
21
R3Din
Right tone in
TP3
INR
R1
20k
a
b
c
d
e
f
g
DP
DIG2
P3.1/XTAL1
Treble(dB)
R1
R2
R3
R4
R5
R6
R7
R8
C4
TP8
OUTLR12
10K
C14
1uF
2
17
19
24
a
b
c
d
e
f
g
DP
DIG1
C3
C2
C1
U4
VCC
11
CON8
VSS
5
5
4
3
2
1
GND
SDB1
SCL1
SDA1
VCC
C18
10uF
VDD
C19
0.1uF
C1
C2
C3
C5
R17
100K
SDA1
CON3
HP Jack
R18
4.7K
C6
R19
4.7K
1
SCL1
2
SDB1
3
R11
100K
C7
SDA
C8
SCL
R8/C9
SDB
R7/C10
CON9
R10
100R
7
8
3
2
1
10
4
5
6
CON5
HP Test
22
20
C4
15nF
7
8
3
2
1
10
4
5
VCC
R9
100R
SDA
SCL
27
15
Bass(dB)
R1
R2
R3
R4
R5
R6
R7
R8
C4
5
R5 1k
TP4
15
TP9
OUTL+
R7
4.7k
9
10
P1.0/TXD
P1.1/RXD
P1.2/T0/SCL
P1.3/INT0/SDA
P1.4/INT1
P3.0XTAL2/CLKOUT
P1.5/RST
P1.6
P1.7
VDD
LPC922
SD
U1
C8
15nF
C2
1uF
12
TP5
INL
C7
2.2nF
4
18
LDO
C3
1uF
VCC
C10
2.2nF
VDD
VDD
R4
82k
C9
33pF
SDB
ICP
4
Left loop in
BP
8
14
GND
Left tone in
Left tone out
VOUT
5
7
VDD
SD
3V
KEY2
KEY1
RST
GND
5
4
3
2
1
LED1
D1
3V
C16
10nF
2
K5
Left loop out
C15
1uF
3D
D2
Right loop out
1
3
KEY4
28
VCC
K4
LED3
D3
P0.0/CMP2/KBI0
P0.1/CIN2B/KBI1
P0.2/CIN2A/KBI2
P0.3/CIN1B/KBI3
P0.4/CIN1A/KBI4
P0.5/CMPREF/KBI5
P0.6/CMP1/KBI6
P0.7/T1/KBI7
A2
-
1
20
19
18
17
16
14
13
6
KEY2
SDB
LED2
LED3
LED4
KEY1
KEY2
KEY3
KEY4
A1
K2
C1
100uF
3V
R15
1K
GND
NC
SCL1
SDA1
VCC
5
4
3
2
1
9
+
CON7
LED4
D4
A2
CON1
DC IN
R16
1K
3V
KEY1
6
K1
A1
-
VCC
9
TP1
5
4
3
2
1
TP7
OUTRCON4
TP6
OUTR+
GND
SDB1
SCL1
SDA1
VCC
R6/C11
4
C21
0.22uF
C20
0.1uF
5
R5
IN
R4
C_FILT
R3
CON6
5
4
3
2
1
GND
NC
NC
NC
VCC
6
20
AD
R2
GND
R1
24 C1
23 C2
22 C3
21 C4
19
18
17
16
15 R8
14 R7
13 R6
12 R5
10 R4
9 R3
8 R2
7 R1
IS31FL3728
C12
1uF
Figure 2: IS31AP4832 Application Schematic
Integrated Silicon Solution, Inc. – www.issi.com
Rev. A, 07/21/2013
2
IS31AP4832 Dual 2.5W Audio Power Amplifier
And Stereo Headphone Driver Evaluation Board Guide
BILL OF MATERIALS
Name
Symbol
Audio Amplifier
U1
LDO
Description
Qty
Supplier
Part No.
Class-AB Audio Amplifier
1
ISSI
IS31AP4832
U2
Low-dropout Regulator
1
PAM
PAM3101
MCU
U3
Microcontroller
1
NXP
LPC922
LED Driver
U4
1
ISSI
IS31FL3728
Displayers
DIG1,DIG2
Array LED Driver
Dual Digit Display Common
Cathode
2
ZSO
2281AS
Diodes
D1~D2
Diode, LED Blue, SMD
2
Everlight
Diodes
D3~D4
Diode, LED Red, SMD
2
Everlight
Resistors
R1,R3
RES,20k,1/16W,±5%,SMD
2
Resistors
R2,R4
RES,82k,1/16W,±5%,SMD
2
Resistors
R5,R13~R16
RES,1k,1/16W,±5%,SMD
5
Resistors
R6,R7,R18,R19
RES,4.7k,1/16W,±5%,SMD
4
Resistors
R8,R11,R17
RES,100k,1/16W,±5%,SMD
3
Resistors
R9,R10
RES,100R,1/16W,±5%,SMD
2
Resistor
R12
RES,10k,1/16W,±5%,SMD
1
Capacitor
C1
CAP,100µF,16V,±20%,SMD
1
Capacitors
C2,C3,C15,C17,
CAP, 1µF,16V,±10%,SMD
4
Capacitors
C4,C8
CAP, 15nF,16V,±20%,SMD
2
Capacitors
C5,C9
CAP, 33pF,16V,±20%,SMD
2
Capacitors
C6,C7,C10,C11
CAP, 2.2nF,16V,±20%,SMD
4
Capacitor
C13
CAP, 0.47µF,16V,±20%,SMD
1
Capacitors
C12,C14
CAP, 1µF,16V,±20%,SMD
2
Capacitor
C16
CAP,10nF,16V,±20%,SMD
1
Capacitor
C18
CAP,10µF,16V,±20%,SMD
1
Capacitors
C19,C20
CAP, 0.1µF,16V,±20%,SMD
2
Capacitor
C21
CAP, 0.22µF,16V,±20%,SMD
1
Buttons
K1~K6
Button SMD
6
19-217/BHC-ZL
1M2RY/3T
19-217/BHC-ZL
1M2RY/3T
Table 2: Bill of Materials, refers to Figure 2 above.
Copyright © 2013 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
Rev. A, 07/21/2013
3
IS31AP4832 Dual 2.5W Audio Power Amplifier
And Stereo Headphone Driver Evaluation Board Guide
0
0
2
2
1
1
2
1
2
2
2
1
1
2
2
1
2
2
5
8
1
4
7
0
3
6
1
2
1
2
1
2
1
2
1
0
2
0
5
5
10
9
8
7
6
10
9
8
7
6
4
4
3
3
2
2
1
2
3
4
5
1
2
3
4
1
5
1
Figure 3: Board Component Placement Guide -Top Layer
Figure 4: Board PCB Layout- Top Layer
Integrated Silicon Solution, Inc. – www.issi.com
Rev. A, 07/21/2013
4
IS31AP4832 Dual 2.5W Audio Power Amplifier
And Stereo Headphone Driver Evaluation Board Guide
0
0
2
2
1
1
2
1
2
2
2
1
1
2
2
1
2
2
5
8
1
4
7
0
3
6
1
2
1
2
1
2
1
2
1
0
2
0
5
5
10
9
8
7
6
10
9
8
7
6
4
4
3
3
2
2
1
2
3
4
5
1
2
3
4
5
1
1
Figure 5: Board Component Placement Guide -Bottom Layer
Figure 6: Board PCB Layout-Bottom Layer
Integrated Silicon Solution, Inc. – www.issi.com
Rev. A, 07/21/2013
5