IS31AP4066D CLASS-AB AUDIO AMPLIFIER
Integrated Silicon Solution, Inc. – www.issi.com 1
Rev. A, 01/09/2015
DESCRIPTION
The IS31AP4066D demo board is a fully assembled
and tested PCB that uses the IS31AP4066D Class-AB
dual bridge-connected audio power amplifier.
Designed to drive speaker impedance of 8Ω or larger.
The demo board provides dual BTL output, capable of
delivering 1.6W into an 8Ω speaker at 5V.
FEATURES
Supply voltage range from 2.7V to 5.5V
Delivers 1.6W into an 8Ω speaker at 5V supply
(THD+N=10%)
Delivers 1.3W into an 8Ω speaker at 5V supply
(THD+N=1%)
Available in QFN-16 (3mm × 3mm) package
QUICK START
Figure 1: Photo of IS31AP4066D Evaluation Board
RECOMMENDED EQUIPMENT
5.0V, 2A power supply
Audio source (i.e. MP3 player, Notebook PC, etc.)
8Ω or larger speaker
ABSOLUTE MAXIMUM RATINGS
≤ 5.5V power supply
≥8Ω speaker
Caution: Do not exceed the conditions listed above; otherwise
the board will be damaged.
PROCEDURE
The IS31AP4066D 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 8Ω (or larger) speakers across the
(OUTA+, OUTA-) terminal and (OUTB+, OUTB-)
terminal. Or connect speakers to the connector
(OUTA, OUTB).
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 CON).
3) Connect the audio sources to the INA terminal
(left channel) and INB terminal (right channel); or
connect audio sources to the connector (AUDIO
IN).
4) Turn on the power supply.
5) Turn on the audio sources.
ORDERING INFORMATION
Part No. Temperature Range Package
IS31AP4066D-QFLS2-EB -40°C to +85°C (Industrial) QFN-16, 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) 969-66 00.
IS31AP4066D CLASS-AB AUDIO AMPLIFIER
Integrated Silicon Solution, Inc. – www.issi.com 2
Rev. A, 01/09/2015
DETAILED DESCRIPTION
The IS31AP4066D demo board features the
IS31AP4066D Class-AB power amplifier IC, designed
to drive speaker impedance of 8Ω or larger.
CUSTOMIZING THE GAIN
The IS31AP4066D demo board is shipped with a gain
of 18.3dB and is set by resistors RI (R1, R2) and RF (R3,
R4). Change resistors RI and RF to reconfigure the gain
of the board .Gain determined in Equation (1) and refer
to IS31AP4066D data sheet for more detail.
V
V
RI
F
R
ain 2
G (1)
HIGH-PASS FILTER
The input capacitors CI (C5, C6) and input resistors RI
(R1, R2) form a high-pass filter with the corner
frequency, fC determined in Equation (2).
IICR
c
f
21
(2)
SHUTDOWN MODE
Jumper (J1) controls the shutdown pin of the
IS31AP4066D IC. Connect the shunt across pin 1 and
2 of the jumper (J1) to enter the shutdown mode of the
board.
+OUTA 1
VDD 2
-OUTA 3
INA
4
GND
5
GND
6
GND
7
BYPASS
8
INB
9-OUTB 10
VDD 11
+OUTB 12
GND
13
GND
14
SD 15
GND
16
U1
IS31AP4066D
C1
10uF C3
0.1uF
VCC
R1
20K
R2
20K
C5
15nF
C6
15nF
VCC
R3
82K
R4
82K
C4
1uF
SPEAKER
SPEAKER
INA
INB
R5
100K J1
CLOSE=SD
C2
0.1uF
Figure 2: IS31AP4066D Application Circuit
IS31AP4066D CLASS-AB AUDIO AMPLIFIER
Integrated Silicon Solution, Inc. – www.issi.com 3
Rev. A, 01/09/2015
BILL OF MATERIALS
Name Symbol Description Qty Supplier Part No.
Amplifier U1 Class- AB power amplifier 1 ISSI IS31AP4066D
Resistor R1,R2 RES,20k,1/16W,±1%,SMD 2 Yageo RC0603JR-0720KL
Resistor R3,R4 RES,82k,1/16W,±1%,SMD 2 Yageo RC0603JR-0782KL
Resistor R5 RES,100k,1/16W,±5%,SMD 1 Yageo RC0603FR-07100KL
Capacitor C1 CAP,10µF,10V,±20%,SMD 1 Yageo CC0805KKX7R6BB106
Capacitor C2 ,C3 CAP, 0.1µF,50V,±10%,SMD 2 Yageo CC0603KKX7R9BB104
Capacitor C4 CAP,1µF,50V,±10%,SMD 1 Yageo CC0603KKX7R9BB105
Capacitor C5,C6 CAP,15nF,50V,±10%,SMD 2 Yageo CC0603KKX7R9BB153
Connector DC IN 2.5 mm DC connector 1
Connector OUTA,OUTB RCA –type connector 2
Connector AUDIO IN 3.5mm min connector 1
Bill of materials, refers to Figure 2 above.
IS31AP4066D CLASS-AB AUDIO AMPLIFIER
Integrated Silicon Solution, Inc. – www.issi.com 4
Rev. A, 01/09/2015
0
0
0
0
2
1
2
1
2
3
1
1
2
1 2
21
1 2
21
2
1
2
1
21
21
21
Figure 3: Board Component Placement Gui de - Top Layer
Figure 4: Board PCB Layout - Top Layer
IS31AP4066D CLASS-AB AUDIO AMPLIFIER
Integrated Silicon Solution, Inc. – www.issi.com 5
Rev. A, 01/09/2015
0
0
0
0
2
1
2
1
2
3
1
1
2
1 2
21
1 2
21
2
1
2
1
21
21
21
Figure 5: Board Component Placement Guide - Botto m Layer
Figure 6: Board PCB Layout - Bottom Layer
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timewithoutnotice.ISSIassumesnoliabilityarisingoutoftheapplicationoruseofanyinformation,productsorservicesdescribedherein.Customersare
advisedtoobtainthelatestversionofthisdevicespecificationbeforerelyingonanypublishedinformationandbeforeplacingordersforproducts.
IntegratedSiliconSolution,Inc.doesnotrecommendtheuseofanyofitsproductsinlifesupportapplicationswherethefailureormalfunctionofthe
productcanreasonablybeexpectedtocausefailureofthelifesupportsystemortosignificantlyaffectitssafetyoreffectiveness.Productsarenot
authorizedforuseinsuchapplicationsunlessIntegratedSiliconSolution,Inc.receiveswrittenassurancetoitssatisfaction,that:
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b.)theuserassumeallsuchrisks;and
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