ISSI IS31AP2111 User manual

IS31AP2111 2×20W STEREO DIGITAL (I2S) AUDIO
AMPLIFIER WITH 20 BANDS EQ FUNCTIONS
Integrated Silicon Solution, Inc. – www.issi.com 1
Rev. A, 12/19/2014
DESCRIPTION
The IS31AP2111 is a digital I2S interface audio
amplifier capable of driving a pair of 8speakers at
20W when operating from a 24V supply. Due to its
Class-D output drive stage, it can operate without an
external heat-sink or fan.
The IS31AP2111 integrates advanced audio
processing capabilities, such as volume control, 20
bands speaker EQ, audio mixing, 3D surround and
Dynamic Range Control (DRC). These functions are
fully programmable via a simple I2C control interface.
Robust protection circuits are provided to protect the
IS31AP2111 from damage due to accidental
erroneous operating conditions. Because of its digital
design, the IS31AP2111 is more tolerant to noise and
PVT (Process, Voltage, and Temperature) variation
than the analog Class-AB or Class-D audio amplifier
counterpart. It has built-in anti-pop circuitry for pop free
operation during power ON.
QUICK START
Figure 1: Photo of IS31AP2111 Evaluation Board
FEATURES
16/18/20/24-bits input with I2S, Left-alignment and
Right-alignment data format
PSNR & DR (A-weighting)
Loudspeaker: 99dB (PSNR), 104dB (DR) @24V
Supply voltage
- 3.3V for digital circuit
- 10V~26V for loudspeaker driver
Loudspeaker output power for at 24V
- 10W × 2CH into 8@0.24% THD+N for stereo
- 20W × 2CH into 8@0.38% THD+N for stereo
Sound processing including:
- 20 bands parametric speaker EQ
- Volume control (+24dB ~ -103dB, 0.125dB/step),
- Dynamic range control (DRC)
- Dual band dynamic range control
- 3D surround sound
- Channel mixing
- Bass/Treble tone control
Anti-pop design
Short circuit and over-temperature protection
I2C control interface with selectable device
address
Support hardware and software reset
Power saving mode
ABSOLUTE MAXIMUM RATINGS
26V power supply
8speaker
Caution: Do not exceed the conditions listed above; otherw
ise the board will be damaged.
RECOMMENDED EQUIPMENT
10~26V, 4A power supply
I2C programmer to set register values
Pair of 820W speakers with RCA plug
Audio source with 3.5mm mini plug
ORDERING INFORMATION
Part No. Temperature Range Package
IS31AP2111-ZLS1-EB 0°C to +70°C (Industrial) eTSSOP-24,Lead-free
Table 1: Ordering Information
For pricing, delivery, and ordering information, please contacts ISSI’s analog marketing team at
[email protected] or [phone].

IS31AP2111 2×20W STEREO DIGITAL (I2S) AUDIO
AMPLIFIER WITH 20 BANDS EQ FUNCTIONS
Integrated Silicon Solution, Inc. – www.issi.com 2
Rev. A, 12/19/2014
PROCEDURE
The IS31AP2111 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) Connect the ground terminal of the power supply
to the GND and the positive terminal to the VCC.
Or connect DC power to connector (DC IN).
2) Connect a pair of 8speakers to the SPK_L
(RCA connector) and SPK_R (RCA connector).
3) Connect an audio source to the audio connector
AUDIO IN (3.5mm stereo connector).
4) Turn on the power supply.
5) IS31AP2111’s default setting is mute. Please
program the following registers via the I2C
interface to disable the mute:
a) When use A/D converter(U2) I2S data output
for IS31AP2111, the evaluation board must
set the MCLK/FS to 256x and Sampling
Frequency to 32/44.1/48kHZ, write value
(04h) to register 0x01 to set the state.
b) 02h State Control 3 Register: To disable the
Master mute: clear bit D3 To disable the
individual channel mutes: clear D2:D1 bits.
c) 03h Master Volume Control Register: To set
the Master volume write a value to bits D7:D0,
To set the individual channel volumes: write a
valuetoregisters0x04-0x05.
d) Please refer to the IS31AP2111 datasheet for
register values used in programming features
such as mute, volume, bass/treble tone,
surround sound, equalization, etc.
JUMPER AND SWITCH SETTING TABLE
Jumper/Switch
Connector Options Setting
(Jumper on “H” for logic 1, on “L” for logic 0)
S1 Enable/disable IS31AP2111
L(0): shutdown mode
H(1): standby mode
S2 Hardware reset Pressed: reset
JP7 3.3V output 3.3V output, if AMS1117 is not mounted, can
provide 3.3V through this connector
JP1 ERROR status output
Short circuit is reported on Error pin (JP1-2) as a
low state, and protection is latched ,connect Error
pin (JP1-2) to PDB pin (JP1-1),short circuit
protection latch can auto-recovery
JP2 A/D Converter (U2) I2S data output
( MCLK,DATA,LRCIN,BCLK)
Use a two pin header to connect I2S signal from
JP2 to JP3
JP3 I2S data input (MCLK, DATA, LRCIN,
BCLK)
Connect I2S signal from JP3 or connect to an
external I2S data source
JP4 GND
JP5
I2C interface, program interface for
an external I2C controller used for
programming the IS31AP2111
registers.
JP5-1 I2C SCL (Clock)
JP5-2 I2C SDA (Data)
JP5-3 I2C GND
JP6 I2C address setting
L(0): Set the I2C device address to 0x30 (7bit
address 0110000)
H(1): Set the I2C device address to 0x34(7bit
address0110100)
SPK_R Right channel output RCA
connector Connect to 8ohm 20W speaker
SPK_L Left channel output RCA connector Connect to 8ohm 20W speaker
AUDIO IN 3.5mm stereo connector Analog audio input
DC IN 2.5mm DC Connector 10~26V, 4A power supply

IS31AP2111 2×20W STEREO DIGITAL (I2S) AUDIO
AMPLIFIER WITH 20 BANDS EQ FUNCTIONS
Integrated Silicon Solution, Inc. – www.issi.com 3
Rev. A, 12/19/2014
PDB
1
ERROR
2
SDATA
3LRCLK
4
SDA
5
SCL
6
RSTB
7
DGND 8
DVDD 9
AD
10
MCLK
11
BCLK
12
VCCRA 13
VCCRB 18 VCCLB
19
OUTL B 20
GNDL
21
OUTL A 22
VCCLA
24
OUTRA 15
GNDR 16
OUTRB 17
U1
IS31AP2111
NC
1GND 2
OUT 3 VCC
412MHZ
Y1
C30
470pF
C31
470pF
R15
10R
R16
10R
10R
R14
10R
R17
C44
470nF
C3 100nF
C40
220nF
C56
NC
C55
NC
C9 100nF
C41
220nF
L10
22uH
L11
22uH
L3
BEAD
L4
BEAD
C34
1nF
C35
1nF
C32
470pF
C33
470pF
R19
10R
R20
10R
R18
10R
R21
10R
C45
470nF
C10 100nF
C42
220nF
C58
NC
C57
NC
C13 100nF
C43
220nF
L12
22uH
L13
22uF
L5
BEAD
L6
BEAD
C38
1nF
C39
1nF
ABCLK
ALRCIN ADC_ RST
3.3V
C5
100nF
C2 100nF
C20 1uF
C22 1uF
C6 100nF
ADC_INL
ADC_INR
ASDATA
R23 1K
R22 1K
C24 1uF
C23 1uF
C36
1nF
C37
1nF
R7
100k
R6
100k
CON4
AUDIOINPUT
R5
100K
C4
100nF
R2
10K
R3
NC
R8
NC
R1
10K
M0
M0
VL
VL
L7
bead
MCLK _ O
ADC_RST
3.3V
ADC_INR
ADC_INL 3.3V
3.3V 3.3V M0
1
MCLK
2
VL
3
SDOUT
4
GND
5
VD
6
SCLK
7
LRCK
8RST 9
AINL 10
VQ 11
AINR 12
VA 13
REF_GND 14
FILT+ 15
M1 16
U2
CS5340
L8
BEAD
3.3V DVDD
1
2
JP7
3.3V
3.3V
VIN
1OUT 2
FB 3
SD
4
GND
5
GND
6
GND
7
GND
8
U3
XL1509-50
D1
SS26
L14
100uH
C18
100nF
C60
10uF
C5 9
1uF R3 5
100K
5V
R32
0R
R34
NC
IN
3VO 2
GND
1
VO 4
U4
AMS1117
3.3V
VCC
GND
DC IN
CON1
C49
10uF
C52
10uF
C1 1
100uF/35V
VCC
1
2
3
4
5
6
JP3
I2S
MCLK
SDATA0
LRCIN
BCLK
1
2
3
4
5
6
JP4
GND
R9 0 R
R1 0 0 R
R11 0R
ABCLK
ALRCIN
ASDATA_O
LRCI N_ O
BCLK_O
1
2
3
4
5
6
JP2
ADC
MCL K _ O
ASDATA
R31
4.7K R30 4.7K
1
2
3
JP5
I2C
3.3V
SDA
SCL
3.3V
R24
10K
1 2 3
JP1
ERROR
C14
100nF
+
C28
470uF/35V
VCC
L1
BEAD
C29
100nF
+
C8
470uF/35V
VCC
L2
BEAD
R26
1Meg
C26
1uF
S2
RST
S1
R33
100K
R12
0R
C51
1uF
3.3V
PDB
R25
1Meg
3.3V
ERROR
RSTB
RSTB
MCLK _ O
SDA
SCL
ERROR
PD
RSTB
MCLK
BCLK
LRCIN
SDATA
AD
CON2
SPK_L
CON3
SPK_R
C53
100nF C54
100nF
DVDD
OUTLA
OUTLB
OUTLB
OUTLA
OUTRA
OUTRB
OUTRB
OUTRA
R27
0R
C50
0.1uF C48
100nF
1 2 3
JP6
3.3V
R4
10K
AD
C1
1uF
C12
1uF
C27
0.1uF
R13
0R
DGND
DGND
C25
0.1uF
C1 5
1uF
Figure 2: IS31AP2111 Application Schematic
BILL OF MATERIALS
Name Symbol Description Qty Supplier Part No.
Amplifier U1 Digital Audio Amplifier 1 ISSI IS31AP2111
A/D
Converter U2 Multi-bit audio A/D Converter 1 CIRRUS
LOGIC CS5340
Buck U3 Buck DC to DC Converter 1 XLSEMI XL1509
LDO U4 3.3V voltage Regulator 1 AMS AMS1117
E-Cap C11 100µF,35V,±20%,IND 1
Capacitor C1,C12,C15,C20,C22,
C23,C24,C26,C51,C59 CAP, 1µF,50V,±10%,SMD 10 Yageo CC0603KKX7R9BB105
Capacitor
C2,C4,C5,C8C6,C14,C
18,C27,C29,C48,C53,
C54,C25,C50
CAP,0.1µF,50V,±10%,SMD 14 Yageo CC0603KKX7R9BB104
Capacitor C52,C60 CAP,10µF,25V,±10%,SMD 2 Yageo CC1206KKX7R8BB106
Capacitor C49 CAP,10µF,10V,±10%,SMD 1 Yageo CC0805KKX7R6BB106
E-Cap C28,C29 470µF,35V, ±20%,IND 2
Capacitor C30~C33 CAP,470pF,50V,±10%,SMD 4 Yageo CC0603KKX7R9BB471
Capacitor C34~C39 CAP,1nF,50V,±10%,SMD 6 Yageo CC0603KKX7R9BB102
Capacitor C44,C45 CAP,0.47µF,50V,±10%,SMD 2 Yageo CC0603KKX7R9BB474

IS31AP2111 2×20W STEREO DIGITAL (I2S) AUDIO
AMPLIFIER WITH 20 BANDS EQ FUNCTIONS
Integrated Silicon Solution, Inc. – www.issi.com 4
Rev. A, 12/19/2014
BILL OF MATERIALS (CONTINUE)
Name Symbol Description Qty Supplier Part No.
Capacitor C3,C9,C10,C13 CAP,0.1µF,50V,±10%,SMD 4 Yageo CC0805KKX7R9BB104
Capacitor C40,C41,C42,C43 CAP,0.22µF,50V,±10%,SMD 4 Yageo CC0805KKX7R9BB224
Capacitor C55,C56,C57,C58 NOT INSTALLED 4
Resistor R3, R8, R34 NOT INSTALLED 3
Resistor R1,R2,R4,R24 RES,10K,1/16W,±5%,SMD 4 Yageo RC0603JR-0710KL
Resistor R9,R10,R11,R12,
R13,R27,R32 RES,0R,1/10W,±5%,SMD 7 Yageo RL0603JR-0700RL
Resistor R5,R6,R7,R33,R35 RES,100K,1/16W,±5%,SMD 5 Yageo RC0603JR-07100KL
Resistor R15,R16,R19,R20 RES,10R0,1/16W,±5%,SMD 4 Yageo RC0603JR-0710R0L
Resistor R30,R31 RES,4.7K,1/16W,±5%,SMD 2 Yageo RC0603JR-074K7L
Resistor R22,R23 RES,1K,1/16W,±5%,SMD 2 Yageo RC0603JR-0701KL
Resistor R25,R26 RES,1M,1/16W,±5%,SMD 2 Yageo RC0603JR-071ML
Resistor R14,R17,R18,R21 RES,10R,1/8W,±5%,SMD 4 Yageo RC1206JR-0710R0L
Switch S1 Mini Slide Switch 2.54mm 1 Würth
Elektronik 450301014042
BUTTON S2 Momentary ON BUTTON SMD 1
Inductor L10~L13
22µH,±20%,Isat=6.5A,
Rdc=0.0234 Würth Elektronik 7447709220
Inductor L14 100µH, ±10%, Isat=0.68A 1 Würth
Elektronik 74477420
Bead L1~L8 BEAD,80ohm/100MHZ,SMD 8 Yageo UPB321611T-800Y–S
DIODE D1 2A,60V SCHOTTKY Diode 1 SS26
Oscillator Y1
5mm×3.2mm, 5032, SMD
Frequency: 12MHz 1
connector DC IN 2.5mm DC Connector 1
connector AUDIO IN 3.5mm min stereo plug 1
connector SPK_L,SPK_R RCA –type plugs 2
Header JP7 2 pin headers 2.54mm 1
Header JP2,JP3,JP4 6 pin headers 3
Header JP1,JP5,JP6, 3 pin headers 3
Bill of Materials refers to Figure 2 above.

IS31AP2111 2×20W STEREO DIGITAL (I2S) AUDIO
AMPLIFIER WITH 20 BANDS EQ FUNCTIONS
Integrated Silicon Solution, Inc. – www.issi.com 5
Rev. A, 12/19/2014
23
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98
7
654
3210
3
0
12
3
1
2
3
21
21
2 1
6
5
4
3
2
1 1
2
3
4
5
6
1
2
3
4
5
6
123
2
1
3
12
2 1
2 1
2 1
2 1
3
1
2
1 2
1 2
21
21
Figure 3: Board Component Placement Guide - Top Layer
Figure 4: Board PCB Layout - Top Layer

IS31AP2111 2×20W STEREO DIGITAL (I2S) AUDIO
AMPLIFIER WITH 20 BANDS EQ FUNCTIONS
Integrated Silicon Solution, Inc. – www.issi.com 6
Rev. A, 12/19/2014
23
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98
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654
3210
3
0
12
3
1
2
3
21
21
2 1
6
5
4
3
2
1 1
2
3
4
5
6
1
2
3
4
5
6
123
2
1
3
12
2 1
2 1
2 1
2 1
3
1
2
1 2
1 2
21
21
Figure 5: Board PCB Layout - Mid Layer 1
23
22
21
20
19
18
17
16
15
14
13
12
11
10
98
7
654
3210
3
0
12
3
1
2
3
21
21
2 1
6
5
4
3
2
1 1
2
3
4
5
6
1
2
3
4
5
6
123
2
1
3
12
2 1
2 1
2 1
2 1
3
1
2
1 2
1 2
21
21
Figure 6: Board PCB Layout - Mid Layer 2

IS31AP2111 2×20W STEREO DIGITAL (I2S) AUDIO
AMPLIFIER WITH 20 BANDS EQ FUNCTIONS
Integrated Silicon Solution, Inc. – www.issi.com 7
Rev. A, 12/19/2014
23
22
21
20
19
18
17
16
15
14
13
12
11
10
98
7
654
3210
3
0
12
3
1
2
3
21
21
2 1
6
5
4
3
2
1 1
2
3
4
5
6
1
2
3
4
5
6
123
2
1
3
12
2 1
2 1
2 1
2 1
3
1
2
1 2
1 2
21
21
Figure 7: Board PCB Layout - Bottom Layer
Figure 8: Board PCB Layout - Bottom Layer
Copyright © 2014 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