Page 1
AN7523
3W BTL Audio Power Amplifier Circuit
■ Features
• Vcc=8V,Output=3W(8Ω)
• Built-in Standby function.
• Built-in DC volume circuits.
■ Applications
• TVs, Audio equipment
AN7523
±0.10
19.9
0.1
8.4
±0.25
±0.10
5.8
±0.25
φ2.65
1.5
±0.25
±0.1
φ3.3
±0.25
18.3
±0.05
5.6
±0.25
HSIP099-P-0000
15.0
Unit : mm
7.1
±0.25
6.3
±0.3
3.75
±0.25
±0.10
±0.25
9
0.50
1.20
±0.3
22.3
2.54
1
0
.1
±0.25
0
+
–0.05
1.7
0.45
±0.25
1.7
■ Block Diagram
1
2
CC
V
Output
3
4
Output
5
Standby
6
Input
7
GND
8
9
N.C.
Volume
GND Output
Page 2
■ Pin Descriptions
AN7523
Pin No.
1
2
3
4
5
6
7
8
9
■ Absolute Maximum Ratings
Parameter
Storage temperature
Function
Vcc
ch1 Output(+)
GND(Output1)
ch1 Output(-)
Standby
ch1 Input
GND
N.C
DC volume
Symbol
Tstg
Ratio
-55 to +150
Unit
ºC
Note
1
Operating ambient temperature
Supply voltage
Supply current
Power dissipation
Note1) Ta=25ºC except storage temperature and operating ambient temperature.
Note2) At no-signal.
Topr
Vcc
Icc
PD
-25 to +70
14
1.0
1220
■ Operating Supply Voltage Range
Operating supply voltage range
Vcc
ºC
mW
3.5V to 13.5V
1
V
A
2
Ta=70ºC
Page 3
■ Electrical Characteristics (Vcc=5.0V,RL=8Ω,freq=1kHz,Ta=25ºC ±2 ºC)
AN7523
Parameter
Quiescent current
Standby current
Output noise voltage
Voltage gain
Total harmonic distortion
Maximum power output
Ripple rejection ratio
Output offset voltage
Maximum attenuation
Center voltage gain
Standby terminal current
Volume terminal current
Symbol
ICQ
ISTB
VNO
GV
THD
PO
RR
Voff
Att
GVM
ISTB
Ivol
Condition
VIN=0mV,Vol.=0V
VIN=0mV,Vol.=0V
Rg=10kΩ,Vol.=0V
PO=0.25W,Vol.=1.25V
PO=0.25W,Vol.=1.25V
THD=10%,Vol.=1.25V
Rg=10kΩ,Vol.=0V
Vr=0.5Vrms,fr=120Hz
Rg=10kΩ,Vol.=0V
PO=0.5W,Vol=0V
PO=0.5W,Vol=0.6V
VIN=0mV,VSTB=3V
VIN=0mV,Vol=0V
min.
–
–
–
31
–
2.4
30
-250
70
20.5
–
-12
0.10
0.10
23.5
Note1) For this measurement,use the filter <Bandwidth:15Hz to 30kHz(12dB/octave)>
typ.
25
1
33
3.0
50
0
85
–
–
max.
60
10
0.4
35
0.5
–
–
250
–
26.5
25
–
Unit
mA
µA
mVrms
dB
%
W
dB
mV
dB
dB
µA
µA
Note
1
1
1
■ Application Circuit
1
2
3
4
5
6
7
8
9
1.0µF
8Ω
470µF
V
Out1
CC
10µF
Standby
68kΩ
10kΩ
270kΩ
V
IN1
Volume
Page 4
■ Characterristic Curve
AN7523
PO - VCC
8
freq=1kHz
THD=10%
7
=8Ω,16Ω
R
L
400Hz HPF
30kHz LPF
6
2-ch Input
(W)
O
Output Power P
=10kΩ
R
g
5
=5V
V
STB
Vol.=1.25V
4
3
2
1
0
02468101214
8Ω
16Ω
Supply Voltage VCC (V)
■ Package Power Dissipation
PO,THD - VIN
10
VCC=8V
freq=1kHz
R
400Hz HPF
30kHz LPF
1
(W)
O
0.1
Output Power P
0.01
0.001
1 10 100
=8Ω
L
THD(10kHz)
P
O
2-ch Input
=10kΩ
R
g
V
=5V
STB
Vol.=1.25V
Input Voltage VIN (mV
■ Printed Board Circuit Layout
THD(100kHz)
THD(1kHz)
rms
100
10
1
0.1
Total Harmonic Distortion THD (%)
0.01
1000
)
2000
1800
1600
(mW)
1400
D
1200
1000
800
600
Power Dissipation P
400
200
0
0 25 50 75 100 125
Ambient Temperature Ta (°C
Without heat sink
=65.5°C/W
R
thj-a
=1880mW(25°C)
P
D
GND
V
CC
ch.1 Out+
ch.1 Out−
4567123 89
GND(Input)
Mute/Volume
(ch.1)
V
IN
Standby
150
)
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