IS31AP4913-QFLS2-EB Datasheet IS31AP4913-QFLS2-EB | P1-P3

IS31AP4913 3D AND BASS ENHANCE STEREO HEADPHONE

DRIVER EVALUATION BOARD GUIDE

Integrated Silicon Solution, Inc. – www.issi.com 1

Rev. A, 12/31/2014

DESCRIPTION

The IS31AP4913 evaluation board is a fully assembled

and tested PCB. The IS31AP4913 is a high quality

stereo headphone driver with 3D and bass enhance

designed to allow the removal of the output

DC-blocking capacitors for reduced component count

and cost. The features 3D and bass can be externally

adjusted via a simple RC network.

FEATURES

 Supply voltage range from 2.7V to 5.5V

 Low output noise (8µV)

 High SNR (102dB)

 -92dB PSRR

 No output DC-blocking capacitors

 Pulse Count Control serial interface

 Available in QFN-20(3mm × 3mm) package

QUICK START

Figure 1: Photo of IS31AP4913 Evaluation Board

RECOMMENDED EQUIPMENT

 5.0V, 2A power supply

 Audio source (i.e. MP3 player, Notebook PC, etc.)

 Headphone (32)

ABSOLUTE MAXIMUM RATINGS

  5.5V power supply

Caution: Do not exceed the conditions listed above; otherwise

the board will be damaged.

PROCEDURE

Follow the steps listed below to verify IS31AP4913

evaluation board operation.

Caution: Do not turn on the power supply until all connections

are completed.

1) Connect headphone (32) to the connector (HP

Jack).

2) 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).

3) Connect the audio sources to the INR terminal

(right channel) and INL terminal (left channel); or

connect audio sources to the connector (AUDIO

IN).

4) Turn on the power supply, and pay attention to the

supply current. If the current exceeds 200mA,

please check for circuit fault.

5) Turn on the audio sources.

ORDERING INFORMATION

Part No. Temperature Range Package

IS31AP4913-QFLS2-EB -40°C to +85°C (Industrial) QFN-20, 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.

IS31AP4913 3D AND BASS ENHANCE STEREO HEADPHONE

DRIVER EVALUATION BOARD GUIDE

Integrated Silicon Solution, Inc. – www.issi.com 2

Rev. A, 12/31/2014

PERFORMANCE DESCRIPTION

The IS31AP4913 evaluation board has six buttons to

switch between the different modes. The operating

mode is indicated by an LED illuminated above the

appropriate buttons. The (1~4) modes are perform by

IS31AP4913.

1) (Default mode) normal: basic operating mode

2) 3D mode: enable 3D enhance function.

3) Bass mode: enable bass enhance function.

4) 3D&Bass: enable 3D and bass enhance function.

5) 2111: use the output DC-blocking capacitors

headphone amplifier (HWD2111) drive headphone

6) DIR: use the input audio source direct drive

headphone.

Note: The IS31AP4913 headphone driver provides solely audio

function capability on the evaluation board.

SOFTWARE SUPPORT

Please refer to the integrated program.

Note: Please refer to the datasheet to get more information

about IS31AP4913.

CON2

AUDIO IN

VCC

R11

100k

C14

0.1uF

C12

1uF

CON3

HP Jack

C18

2.2uF

C16

2.2uF

VCC

VDD

GND

VOUT

LDO

10nF

1uF

C10

1uF

3D&Bass

Ba ss

NORMAL

R17

100k

R18

100k

R19

100k

R20

100k

key5 key2ke y 3ke y 4

C11

0.1uF

EN4913

ke y 1

ke y 2

ke y 3

ke y 4

LED1

LED2

LED3

LED4

R14

LED1

LED2

LED3

LED4

EN4913

VCC

0.47uF

EN2111

CLK2111

DATA2111

CLK2111

0.47uF

INL

INR

OUTL

OUTR

OUTL

OUTR

0.1uF

LED5

2111

R16

100k

D5 LED5

22uF

ke y 6

100k

GND

VCC

CON1

COM1

COFF1

COFF2

COM2

CON2

RELAY

VCC

INL

INR

OUTL

OUTR

DIR

R21

100k

ke y 1

LED6

EN_DIR

LED6

ke y 5

ke y 6RST

TP3

TP5

TP4 TP7

P0.0/CMP2/KBI0

P1.7/OCC/AD00

P1.6/OCB

P1.5/RST

VSS

P3.1/XTAL1

P3.0XTAL2/CLKOUT

P1.4/INT1

P1.3/INT0/SDA

P1.2/T0/SCL

P1.1/RXD

P1.0/TXD

P0.7/T1/KBI7

P0.6/CMP1/KBI6

VDD

P0.5/CMPREF/KBI5

P0.4/CIN1A/KBI4

P0.3/CIN1B/KBI3

P0.2/CIN2A/KBI2

P0.1/CIN2B/KBI1

LPC922

VOUT1

VIN1

BYP ASS

CLOCK

GND

UP/DN

SDB

VIN2

VOUT2

VDD

2111

SS16

NPN_3904

BASSR

INFR

INR

3DR

3DL

BASSL

INFL

INL

SGND

CTRL

VCC

VREF

PGND

OUTR

VSS

OUTL

IS31AP4913

R10

4.7k

C19

47nF

C21

2.2uF

R13

510k

C22

22nF

R15

20k

R23

20k

C20

0.47uF

R12

30k

R22

120k

C23

6.8pF

C15

22nF

510k

20K

20k

120k

C13

6.8pF

C17

0.47uF

30k

TP8

TP6

VCC

10uF

CON1

DC IN

TP1

TP2

TP9

ICP

EN2111

DATA2111

RST

GND

Figure 2: IS31AP4913 Application Schematic

IS31AP4913 3D AND BASS ENHANCE STEREO HEADPHONE

DRIVER EVALUATION BOARD GUIDE

Integrated Silicon Solution, Inc. – www.issi.com 3

Rev. A, 12/31/2014

BILL OF MATERIALS

Name Symbol Description Qty Supplier Part No.

Audio Amplifier U1

3D,Bass Stereo Headphone

Driver

1 ISSI IS31AP4913

Audio Amplifier U2 Headphone Amplifier 1 HWD HWD2111

LDO U3 LDO 1 PAM PAM3101

MCU U4 Microcontroller 1 NXP LPC922

Relay S1 Relay, 5V 1 Panasonic TQ2-5V

Transistor Q1 Transistor, NPN,3904 1 Avic MMBT3904LT1

Diode D1~D6 Diode, LED Blue, SMD 6 Everlight 19-217/BHC-ZL1M2RY/3T

Resistor R1,R2 RES,0,1/16W,±5%,SMD 2

Yageo

RL0603JR-0700RL

Resistor R3,R11 RES,100k,1/16W,±5%,SMD 2

Yageo

RC0603JR-07100KL

Resistor R4,R14 RES,1k,1/16W,±5%,SMD 2

Yageo

RC0603JR-071KL

Resistor R5,R22 RES,120k,1/16W,±1%,SMD 2

Yageo

RC0603FR-07120KL

Resistor R6,R7,R15,R23 RES,20k,1/16W,±1%,SMD 4

Yageo

RC0603FR-0720KL

Resistor R8,R13 RES,510k,1/16W,±5%,SMD 2

Yageo

RC0603JR-0720KL

Resistor R9,R12 RES,30k,1/16W,±1%,SMD 2

Yageo

RC0603FR-0730KL

Resistor R10 RES,4.7k,1/16W,±5%,SMD 1

Yageo

RC0603JR-074K7L

Resistor R16~R21 RES,10k,1/16W,±5%,SMD 6

Yageo

RC0603JR-0710KL

Capacitor C1,C11,C14 CAP,0.1µF,50V,±10%,SMD 3

Yageo

CC0603KKX7R9BB106

Capacitor C2 CAP,10µF,16V,±20%,SMD 1

Yageo

CC0805KKX7R6BB106

Capacitor C3,C6 CAP,22µF,25V,±20%,SMD 2

Yageo

Capacitor C4,C5,C7 CAP,0.47µF,50V,±10%,SMD 3

Yageo

CC0603KKX7R9BB474

Capacitor C8,C10,C12 CAP,1µF,50V,±10%,SMD 3

Yageo

CC0603KKX7R9BB105

Capacitor C9 CAP,10nF,50V,±10%,SMD 1

Yageo

CC0603KKX7R9BB103

Capacitor C13,C23 CAP,6.8pF,50V,±10%,SMD 2

Yageo

CC0603KKX7R9BB6P8

Capacitor C15,C22 CAP,22nF,50V,±10%,SMD 2

Yageo

CC0603KKX7R9BB103

Capacitor C16,C18,C21 CAP,2.2µF,16V,±10%,SMD 3

Yageo

CC0603KKX7R7BB225

Capacitor C17,C20 CAP,0.47µF,50V,±10%,SMD 2

Yageo

CC0603KKX7R9BB474

Capacitor C19 CAP,47nF,50V,±10%,SMD 1

Yageo

CC0603KKX7R9BB473

Connector DC IN 2.5mm DC connector 1

Connector AUDIO IN 3.5mm mini connector 1

Connector HP Jack 3.5mm mini connector 1

Bill of Materials, refer to Figure 2 above.

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