ICs for Audio Common Use
s
Overview
The AN7174K is an integrated circuit for 14W (13.2V,
4
) output power amplifier circuit. Two BTL amplifiers are
built-in on a single chip and stereo operation is possible.
It is highly reliable due to protection circuits built-in. The
built-in stand-by circuit makes it possible to switch the cir-
cuit ON/OFF with a charge mode to power supply pin.
s
Features
High output power (BTL 14W
2)
Stand-by circuit built-in
Protection circuits built-in (temperature, overvoltage,
V
OUT
GND short, Load short, V
OUT
V
CC
short)
Low shock noise from power ON/OFF operation
Fewer external parts
Highly stable operation
AN7174K
Dual BTL 14W Audio Power Amplifier Circuit
Unit : mm
6.33
0.5
29.6
0.3
5.9
0.25
7.7
0.3
7.8
0.5
1
16
29.96
0.3
0.6
0.2
1.778
3.6
28.0
0.3
20.0
0.25
R1.8
0.6
1.2
0.1
3.5
0.3
2.66
2.8
0.3
12.5
0.3
(14.1)
(4.06)
2.54
0.8
(0.25)
1.45
0.25
1.8
0.25
(1.2)
1.45
0.25
16-Lead ZIP Package with Fin (EZIP016-P-0660)
Input
Circuit
Driver
Circuit
Output
Circuit
4
Input
Circuit
Driver
Circuit
Output
Circuit
2
3
7
6
13
1
8
16
12
14
Input
Circuit
Driver
Circuit
Output
Circuit
Input
Circuit
Driver
Circuit
Output
Circuit
15
10
5
11
9
Protection Circuit
Stand by
Circuit
GND
V
CC
GND
GND
s
Block Diagram
ICs for Audio Common Use
AN7174K
s
Absolute Maximum Ratings
(Ta= 25C)
V
CC
V
CC (surge)
I
CC
P
D
T
opr
T
stg
Supply Voltage
Note 1)
Peak Supply Voltage
Note 2)
Supply Current
Power Dissipation
Note 3)
Operating Ambient Temperature
Storage Temperature
V
V
A
W
C
C
Parameter
Symbol
Rating
Unit
24
50
6
62.5
30 ~ + 75
55 ~ + 150
Note 1) No Signal
Note 2) Time= 0.2s
Note 3) R
j c
= 2C/W
s
Recommended Operating Range
(Ta = 25C)
8V ~ 18V
Parameter
Symbol
Range
Operating Supply Voltage Range
V
CC
Parameter
Symbol
Condition
min.
typ.
max.
Unit
Quiescent Circuit Current
Output Noise Voltage
Voltage Gain
Total Harmonic Distortion
Maximum Output Power (4
)
Ripple Rejection Ratio
Output Offset Voltage
Channel Balance
Total Harmonic Distortion
Total Harmonic Distortion
Frequency Characteristics
Frequency Characteristics
Quiescent Circuit Current at Stand-by Pin
Crosstalk
I
CQ
V
no
*
G
V
THD
P
O
RR *
V
O (offset)
CB
THD
THD
f
CH
f
CL
I
CQ (STBYON)
CT
V
in
= 0mV
V
in
= 0mV, R
g
= 10k
V
in
= 5mV
V
in
= 5mV
THD= 10%
R
g
= 0
, V
in
= 0mV, Ripple= 300mV, 120Hz
V
in
= 0mV
V
in
= 5mV
V
in
= 5mV, 100Hz
V
in
= 5mV, 10kHz
V
in
= 5mV, 3dB down
V
in
= 5mV, 3dB down
Stand-by Pin ON
V
in
= 5mV, R
g
= 10k
50.5
9
35
300
1
120
0.6
52.5
0.2
12.5
40
0
0
0.26
0.45
22
21
21
61
200
1.5
54.5
0.75
300
1
mA
mV
dB
%
W
dB
mV
dB
%
%
kHz
Hz
A
dB
* With 15Hz ~ 30kHz (12dB/oct) filter
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Electrical Characteristics
(V
CC
= 13.2V, R
L
= 4
, f = 1kHz, Ta = 25C)
20
16
12
8
4
0
Supply Voltage V
CC
(V)
M
a
x
i
m
u
m
O
u
t
p
u
t
P
O
(
W
)
12
0
4
8
20
16
G
V
, THD
f
54
52
50
48
46
Frequency f (Hz)
100k
10
1k
10k
1.0
0.8
0.6
0.4
0.2
0
100
T
o
t
a
l
H
a
r
m
o
n
i
c
D
i
s
t
o
r
t
i
o
n
T
H
D
(
%
)
P
O
, THD
V
in
100
10
1
0.1
0.01
Input Voltage V
in
(mV)
O
u
t
p
u
t
P
o
w
e
r
P
O
(
W
)
V
o
l
t
a
g
e
G
a
i
n
G
V
(
d
B
)
100
0.1
1
10
100
10
1
0.1
0.01
T
o
t
a
l
H
a
r
m
o
n
i
c
D
i
s
t
o
r
t
i
o
n
T
H
D
(
%
)
P
O
V
CC
V
CC
= 13.2V
R
L
= 4
P
O
= 1W
THD
P
O
THD
G
V
f
= 1kHz
THD
= 10%
R
L
= 4
V
CC
= 13.2V
R
L
= 4
f
= 1kHz
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Characteristics Curve
ICs for Audio Common Use
AN7174K
52
50
48
46
44
42
40
38
36
Supply Voltage V
CC
(V)
V
o
l
t
a
g
e
G
a
i
n
G
V
(
d
B
)
8
7
3
4
6
5
11
10
9
P
D
Ta
65
60
55
50
45
40
35
30
25
20
15
10
5
0
Ambient Temperature Ta (C)
150
125
0
75
50
100
25
G
V
I
CQ
V
CC
200
160
120
80
40
0
Supply Voltage V
CC
(V)
Q
u
i
e
s
c
e
n
t
C
i
r
c
u
i
t
C
u
r
r
e
n
t
I
C
Q
(
m
A
)
P
o
w
e
r
D
i
s
s
i
p
a
t
i
o
n
P
D
(
W
)
20
4
8
12
16
G
V
, THD
V
CC
10
9
8
7
6
5
4
3
2
1
0
T
o
t
a
l
H
a
r
m
o
n
i
c
D
i
s
t
o
r
t
i
o
n
T
H
D
(
%
)
(1)
(2)
(3)
(4)
Tc Ta
With a 100cm
2
3
mm Al (Black col-
or coated) or a
heat sink (not
lacquered)
With a 100cm
2
2
mm Al
Witout heat sink
(R
j c
= 2C/W)
f
= 1kHz
R
L
= 4
V
in
= 3mV
3.0W
(1)
(4)
20.8W (2)
15.6W (3)
62.5W
THD
1
5
6
7
8
10
12
11
9
2
3
4
16
15
14
13
200
100
F
1
F
IN Ch.1
0.047
F
200
100
F
0.47
F
1
F
+
IN Ch.2
GND (Input side)
2000
F
V
CC
=
13.2V
+
V
CC
Pin
OUT Ch.1
4
0.1
F
2.2
0.1
F
2.2
Ripple Filter Pin
200
F
OUT Ch.2
4
0.1
F
2.2
0.1
F
2.2
(STAND-BY)
0V (stand-by mode)
+5V (Normal ON mode)
Note) 300mV, 120Hz ripple component should be applied at the measurement of ripple rejection ratio.
GND
GND
AN7174K
+
+
+
+
s
Application Circuit
ICs for Audio Common Use
AN7174K
s
Pin Descriptions
Equivalent Circuit
Pin No.
1
Pin Name
2
4
5
7
10
3
Supply Pin
Output Ch.1
GND (Output Ch.1)
Output Ch.1
Stand-by
GND (Input)
Supply connection pin
GND pin for Ch.1 output
Ch.1 negative feedback pin (+)
Ch.1 positive-phase output pin
Ch.1 reverse-phase output pin
Negative Feedback Ch.1
GND pin for input signal source
Circuit mode (stand-by operation)
switching pin
Description
6
Input Ch.1
Ch.1 input signal applied pin
8
Ch.1 negative feedback pin ()
Negative Feedback Ch.1
9
Ch.2 negative feedback pin ()
Negative Feedback Ch.2
11
Ch.2 negative feedback pin (+)
Negative Feedback Ch.2
4
9
6
7
8
11
2
5
ICs for Audio Common Use
AN7174K
s
Precautions on use
1. Thermal breaking protection
The protective operation starts at the chip temperature of 150C
5C.
2. Overvoltage protection
The protective operation starts at V
CC
26V.
3. Ground fault protection
The protective operation starts when the contact resistance dropped below 0.3
.
4. Load shortcircuit protection
The protective operation starts when the contact resistance dropped below 0.3
.
5. Atmospheric fault protection
The protective operation starts only when a shortcircuit between pins occurred.
6. TAB shortcircuit
Even TAB short-circuiting with the GND potential causes no breaking trouble.
7. The operation remains normal even when the load is 2
.
8. When the chip temperature abnormally rose, the temperature protection circuit gets actuated, but it is automatically reset
when the chip temperature dropped below the set level.
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Pin Descriptions (Cont.)
Equivalent Circuit
Pin No.
Pin Name
12
15
GND (Output Ch.2)
Ch.2 input signal applied pin
Input Ch.2
GND pin for Ch.2 output
Description
13
Supply ripple rejection pin
Ripple Filter
14
Ch.2 reverse-phase output pin
Output Ch.2
16
Ch.2 positive-phase output pin
Output Ch.2
14
12
16
13
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