IS31AP4088A-QFLS2-EB

IS31AP4088A CLASS-AB AUDIO AMPLIFIER
DESCRIPTION
RECOMMENDED EQUIPMENT
The IS31AP4088A demo board is a fully assembled
and tested PCB that uses the IS31AP4088A Class-AB
combines dual bridge speaker amplifiers and stereo
headphone amplifiers on one chip. Designed to drive
speaker impedance of 4Ω or larger. The demo board
provides dual BTL output, capable of delivering 2.84W
into a 4Ω speaker at 5V.



FEATURES
Caution: Do not exceed the conditions listed above, otherwise
the board will be damaged.




Supply voltage range from 2.7V to 5.5V
Delivers 2.84W into a 4Ω speaker at 5V supply
(THD+N=10%).
Delivers 1.71W into an 8Ω speaker at 5V supply
(THD+N=10%)
Available in QFN-16 (4mm × 4mm) package
5.0V, 2A power supply
Audio source (i.e. MP3 player, Notebook PC, etc.)
A pair of 8Ω or 4Ω speaker
ABSOLUTE MAXIMUM RATINGS


≤ 5.5V power supply
≥4ohm speaker
PROCEDURE
The IS31AP4088A 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.
QUICK START
1)
2)
3)
4)
5)
Connect 4Ω (or larger) speakers across the
(OUTA+, OUTA-) terminal and (OUTB+, OUTB-)
terminal. Or connect speakers to the connector
(OUTA, OUTB).
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).
Connect the audio sources to the INA terminal
(left channel) and INB terminal (right channel); or
connect audio sources to the connector (AUDIO
IN).
Turn on the power supply.
Turn on the audio sources.
Figure 1: Photo of IS31AP4088A Evaluation Board
ORDERING INFORMATION
Part No.
Temperature Range
Package
IS31AP4088A-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
[email protected] or (408) 969-6600.
Integrated Silicon Solution, Inc. – www.issi.com
Rev. A, 01/09/2015
1
IS31AP4088A CLASS-AB AUDIO AMPLIFIER
DETAILED DESCRIPTION
HIGH-PASS FILTER
The IS31AP4088A demo board features the
IS31AP4088A Class-AB power amplifier IC, designed
to drive speaker impedance of 4Ω or larger.
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).
1
f 
c 2R C 
I I
CUSTOMIZING THE GAIN
The IS31AP4088A 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 IS31AP4088A data sheet for more detail.
Gain 
2  RF  V 
 
V 
RI
(1)
(2)
SHUTDOWN MODE
Jumper (J1) controls the shutdown pin of the
IS31AP4088A IC. Connect the shunt across pin 1 and
2 of the jumper (J1) to enter the shutdown mode of the
board.
HEADPHONE MODE
Connect the headphone to the connector (HP Jack)
enter the headphone mode of the board.
R3
VCC
82K
J2
VCC
VCC
C1
10uF
C2
C3
R5
100K
DC CON
0.1uF
0.1uF
J1
R8
R1
4
INA
15nF
J8
INA
15
100uF
U1
SD
C5
VDD
VDD
11
2
CLOSE=SD
-OUTA
+OUTA
9
BYPASS
HPL
J7
1
J3
VCC
R6 100K
14
1uF
R7 100K
+OUTB
AUDIO IN
12
SPEAKER
HP Jack
8
INB
-OUTB
10
J4
5
6
7
13
14
16
20K
GND
GND
GND
GND
GND
GND
R2
INB
15nF
SPEAKER
3
20K
C4
C6
1K
R9
IS31AP4088A
100uF
1K
R4
82K
Figure 2: IS31AP4088A Application Circuit
Integrated Silicon Solution, Inc. – www.issi.com
Rev. A, 01/09/2015
2
IS31AP4088A CLASS-AB AUDIO AMPLIFIER
BILL OF MATERIALS
Name
Symbol
Amplifier
U1
Resistor
Description
Qty
Supplier
Part No.
Class- AB power amplifier
1
ISSI
IS31AP4088A
R1,R2
RES,20k,1/16W,±1%,SMD
2
Yageo
RC0603FR-0720KL
Resistor
R3,R4
RES,82k,1/16W,±1%,SMD
1
Yageo
RC0603FR-0782KL
Resistor
R5,R6,R7
RES,100k,1/16W,±5%,SMD
3
Yageo
RC0603JR-07100KL
Capacitor
C1
CAP,10µF,10V,±10%,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
1
Yageo
CC0603KKX7R9BB153
Connector
J2
2.5 mm DC connector
1
Connector
J3,J4
RCA-type connector
2
Connector
J7,J8
3.5mm min connector
2
Bill of materials, refers to Figure 2 above.
Integrated Silicon Solution, Inc. – www.issi.com
Rev. A, 01/09/2015
3
IS31AP4088A CLASS-AB AUDIO AMPLIFIER
0
2
2
1
1
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1
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3
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1
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Figure 3: Board Component Placement Guide - Top Layer
Figure 4: Board PCB Layout - Top Layer
Integrated Silicon Solution, Inc. – www.issi.com
Rev. A, 01/09/2015
4
IS31AP4088A CLASS-AB AUDIO AMPLIFIER
0
2
2
1
1
0
2
1
2
1
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Figure 5: Board Component Placement Guide - Bottom Layer
Figure 6: Board PCB Layout - Bottom Layer
Copyright © 2015 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, 01/09/2015
5