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 8Ω 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 8Ω @0.24% THD+N for stereo - 20W × 2CH into 8Ω @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 ≥ 8Ω speaker

Caution: Do not exceed the conditions listed above; otherwise the board will be damaged.

RECOMMENDED EQUIPMENT

10~26V, 4A power supply I2C programmer to set register values Pair of 8Ω 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 analog@issi.com or (408) 969-6600.

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 8Ω 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 value to registers 0x04-0x05.

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

PDB1

ERROR2

SDATA3LRCLK

4

SDA5

SCL6

RSTB7

DGND 8

DVDD9

AD10

MCLK11

BCLK12

VCCRA 13

VCCRB18

VCCLB19

OUTLB20

GNDL21

OUTLA 22

VCCLA24

OUTRA15

GNDR16

OUTRB 17

U1

IS31AP2111

NC1

GND2

OUT3

VCC4

12MHZ

Y1

C30470pF

C31470pF

R1510R

R1610R

10RR14

10RR17

C44

470nF

C3100nF

C40

220nF

C56

NC

C55

NC

C9100nF

C41

220nF

L10

22uH

L11

22uH

L3

BEAD

L4

BEAD

C34

1nF

C35

1nF

C32470pF

C33470pF

R1910R

R2010R

R1810R

R2110R

C45

470nF

C10100nF

C42

220nF

C58

NC

C57

NC

C13100nF

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 100nFADC_INL

ADC_INR

ASDATA

R23 1K

R22 1K

C24 1uF

C23 1uF

C36

1nF

C37

1nF

R7100k

R6100k

CON4

AUDIO INPUT

R5100K

C4100nF

R2

10K

R3NC

R8

NC

R110K

M0

M0

VL

VL

L7

bead

MCLK_O

ADC_RST

3.3V

ADC_INR

ADC_INL 3.3V

3.3V 3.3V

M01

MCLK2

VL3

SDOUT4

GND5

VD6

SCLK7

LRCK8

RST9

AINL 10VQ 11

AINR12

VA 13REF_GND 14

FILT+15

M116

U2

CS5340

L8

BEAD

3.3V DVDD

12

JP7

3.3V

3.3V

VIN1

OUT2F

B3

SD

4

GN

D5

GN

D6

GN

D7

GN

D8

U3XL1509-50

D1

SS26

L14

100uH

C18100nF

C60

10uF

C59

1uF R35100K

5V

R32

0R

R34

NC

IN3

VO2

GN

D1

VO 4

U4AMS1117

3.3VVCC

GND

DC INCON1

C49

10uF

C52

10uF

C11

100uF/35V

VCC

123456

JP3

I2S

MCLKSDATA0

LRCINBCLK

123456

JP4

GND

R9 0R

R10 0R

R11 0R

ABCLKALRCIN

ASDATA_O

LRCIN_OBCLK_O

123456

JP2

ADC

MCLK_OASDATA

R314.7K

R304.7K

123

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

BE AD

R26

1MegC26

1uF

S2

RST

S1R33

100K

R12

0R

C511uF

3.3V

PD

B

R25

1Meg

3.3V

ER

RO

R

RS

TB

RSTB

MCLK_O

SDA

SCL

ERROR

PD

RSTB

MCLK

BCLKLRCIN

SDATA

AD

CON2

SPK_L

CON3

SPK_R

C53100nF

C54100nF

DVDD

OUTLA

OUTLB

OUTLB

OUTLA

OUTRA

OUTRB

OUTRB

OUTRA

R27

0R

C50

0.1uF C48

100nF

1 2 3JP6

3.3VR4

10K

AD

C1

1uF

C121uF

C27

0.1uFR13

0R

DGND

DGND

C250.1uF

C151uF

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,C18,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=0.023Ω

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

22

2120

19

18

17

16

15

14

13

12

111098

7654

3210

30

1 2

3

1

2

3

21

2 1

2 1

6

5

4

3

2

1 1

2

3

4

5

6

1

2

3

4

5

6

1 2 3

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

22

2120

19

18

17

16

15

14

13

12

111098

7654

3210

30

1 2

3

1

2

3

21

2 1

2 1

6

5

4

3

2

1 1

2

3

4

5

6

1

2

3

4

5

6

1 2 3

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

2120

19

18

17

16

15

14

13

12

111098

7654

3210

30

1 2

3

1

2

3

21

2 1

2 1

6

5

4

3

2

1 1

2

3

4

5

6

1

2

3

4

5

6

1 2 3

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

2120

19

18

17

16

15

14

13

12

111098

7654

3210

30

1 2

3

1

2

3

21

2 1

2 1

6

5

4

3

2

1 1

2

3

4

5

6

1

2

3

4

5

6

1 2 3

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