ICs for Audio Common Use
AN7174K
Dual BTL 14W Audio Power Amplifier Circuit
s
Overview
The AN7174K is an integrated circuit for 14W (13.2V,
4Ω) 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.
ø 3.6
5.9±0.25 7.7±0.3
7.8±0.5
6.33±0.5
16
0.6±0.2
Unit : mm
M
ain
Di
sc te
on na
tin nc
ue e/
d
29.96±0.3
28.0±0.3
20.0±0.25
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
ce
/D
isc
on
s
Block Diagram
7
8
V
CC
1
13
6
Input
Circuit
Ma
int
en
Input
Circuit
5
Stand – by
Circuit
Input
Circuit
Pl
12
GND 10
Input
Circuit
11
9
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0.6
1.778
1
2.8±0.3
1.2±0.1
(0.25)
12.5±0.3
(14.1)
2.66
(4.06)
3.5±0.3
2.54±0.8
1.45±0.25
1.8±0.25
(1.2)
1.45±0.25
16-Lead ZIP Package with Fin (EZIP016-P-0660)
Driver
Circuit
Output
Circuit
4
3
2
GND
Driver
Circuit
Output
Circuit
Protection Circuit
Driver
Circuit
Driver
Circuit
Output
Circuit
Output
Circuit
16
15 GND
14
s
Features
•
High output power (BTL 14W
×
2)
•
Stand-by circuit built-in
•
Protection circuits built-in (temperature,
an
tin
ue
di
R1.8
29.6±0.3
AN7174K
s
Absolute Maximum Ratings
(Ta= 25˚C)
Parameter
Supply Voltage
Note 1)
Peak Supply Voltage
Note 2)
Supply Current
Power Dissipation
Note 3)
ICs for Audio Common Use
Symbol
V
CC
V
CC (surge)
I
CC
P
D
T
opr
T
stg
Rating
24
50
6
62.5
– 30 ~ + 75
– 55 ~ + 150
Unit
V
V
A
W
˚C
˚C
Operating Ambient Temperature
Storage Temperature
Note 1)
Note 2)
Note 3)
No Signal
Time= 0.2s
R
θj–
c
= 2˚C/W
Parameter
Symbol
V
CC
Operating Supply Voltage Range
s
Electrical Characteristics
(V
CC
= 13.2V, R
L
= 4Ω, f = 1kHz, Ta = 25˚C)
Parameter
Symbol
I
CQ
V
no
*
G
V
P
O
THD
Condition
Quiescent Circuit Current
Output Noise Voltage
Voltage Gain
V
in
= 0mV
V
in
= 5mV
V
in
= 5mV
Total Harmonic Distortion
Ripple Rejection Ratio
Output Offset Voltage
Channel Balance
Maximum Output Power (4Ω)
RR *
CB
V
O (offset)
THD
THD
f
CH
f
CL
Total Harmonic Distortion
Frequency Characteristics
Total Harmonic Distortion
Frequency Characteristics
Crosstalk
on
tin
Quiescent Circuit Current at Stand-by Pin I
CQ (STBY–ON)
CT
* With 15Hz ~ 30kHz (12dB/oct) filter
Ma
int
en
P
O
– V
CC
an
ce
s
Characteristics Curve
20
100
Total Harmonic Distortion THD (%)
16
Maximum Output P
O
(W)
f = 1kHz
THD = 10%
R
L
= 4Ω
V
CC
= 13.2V
R
L
= 4Ω
f = 1kHz
10
Output Power P
O
(W)
Voltage Gain G
V
(dB)
Pl
12
46
1.0
V
CC
= 13.2V
0.8
R
L
= 4Ω
P
O
= 1W
0.6
0.4
THD
0.2
P
O
1
1
8
0.1
4
THD
0.1
0
0
4
8
12
16
20
0.01
0.1
1
10
0.01
100
10
100
1k
10k
0
100k
Supply Voltage V
CC
(V)
Input Voltage V
in
(mV)
Frequency f (Hz)
Total Harmonic Distortion THD (%)
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.
Range
8V ~ 18V
min.
typ.
max.
Unit
120
0.6
0.2
40
0
0
200
1.5
V
in
= 0mV, R
g
= 10kΩ
50.5
9
52.5
12.5
54.5
0.75
THD= 10%
R
g
= 0Ω, V
in
= 0mV, Ripple= 300mV, 120Hz
V
in
= 0mV
V
in
= 5mV
35
–1
–300
300
1
V
in
= 5mV, 100Hz
V
in
= 5mV, 10kHz
0.26
0.45
22
21
21
61
V
in
= 5mV, –3dB down
V
in
= 5mV, –3dB down
Stand-by Pin ON
V
in
= 5mV, R
g
= 10kΩ
P
O
, THD – V
in
G
V
, THD – f
100
54
52
50
48
G
V
10
M
ain
Di
sc te
on na
tin nc
ue e/
d
s
Recommended Operating Range
(Ta = 25˚C)
mA
mV
dB
%
W
dB
dB
%
%
mV
di
kHz
Hz
µA
dB
/D
isc
ue
ICs for Audio Common Use
AN7174K
G
V
, THD – V
CC
10
f = 1kHz
R
L
= 4Ω
V
in
= 3mV
52
Voltage Gain G
V
(dB)
50
48
46
44
42
40
38
36
9
Total Harmonic Distortion THD (%)
G
V
8
7
6
5
4
3
2
1
Quiescent Circuit Current I
CQ
(mA)
160
200
I
CQ
– V
CC
65
60
55
50
Power Dissipation P
D
(W)
45
40
35
30
25
20
15
10
5
62.5W
(1)
P
D
– Ta
(1) Tc – Ta
(R
θj
– c
= 2˚C/W)
(2) With a 100cm
2
×
3
mm Al (Black col-
or coated) or a
heat sink (not
lacquered)
(3) With a 100cm
2
×
2
mm Al
(4) Witout heat sink
120
THD
8
3
4
5
6
7
9
10
0
11
Supply Voltage V
CC
(V)
s
Application Circuit
IN Ch.1
–
+
1µF
100µF
+
–
0.047µF
200
Ω
GND (Input side)
IN Ch.2
tin
10
isc
–
+
12
11
9
1µF
an
100µF
0.47µF
200
Ω
+
–
Pl
0V (stand-by mode)
Note)
300mV, 120Hz ripple component should be applied at the measurement of ripple rejection ratio.
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.
(4)
0
4
8
12
16
20
3.0W
0
0
25
50
75
100
125
150
Supply Voltage V
CC
(V)
Ambient Temperature Ta (˚C)
V
CC
=
13.2V
V
CC
Pin
+
–
2000µF
ce
Ma
int
en
M
ain
Di
sc te
on na
tin nc
ue e/
d
80
40
1
6
7
8
2
3
4
GND
20.8W (2)
15.6W (3)
OUT Ch.1
4
Ω
0.1
µF
0.1µF
ue
di
2.2
Ω
2.2
Ω
AN7174K
13
Ripple Filter Pin
200µF
on
+
–
/D
16
15
14
GND
OUT Ch.2
4Ω
0.1
µF
0.1µF
2.2
Ω
2.2
Ω
5
(STAND-BY)
+5V (Normal ON mode)
AN7174K
s
Pin Descriptions
Pin No.
1
Pin Name
Supply Pin
Description
Supply connection pin
ICs for Audio Common Use
Equivalent Circuit
2
Output Ch.1
Ch.1 positive-phase output pin
2
M
ain
Di
sc te
on na
tin nc
ue e/
d
3
GND (Output Ch.1)
GND pin for Ch.1 output
4
Output Ch.1
Ch.1 reverse-phase output pin
5
Stand-by
Circuit mode (stand-by
switching pin
operation)
6
Input Ch.1
Ch.1 input signal applied pin
7
Negative Feedback Ch.1
Ch.1 negative feedback pin (+)
8
Negative Feedback Ch.1
Ch.1 negative feedback pin (–)
Ma
int
en
an
ce
/D
9
Negative Feedback Ch.2
Ch.2 negative feedback pin (–)
10
GND (Input)
GND pin for input signal source
11
Negative Feedback Ch.2
Ch.2 negative feedback pin (+)
Pl
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ct
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an ut e
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cy
on es
cle
ic. t in
sta
co fo
ge
.jp rm
.
/en at
/ ion
.
5
6
7
8
9
11
4
isc
on
tin
ue
di
ICs for Audio Common Use
s
Pin Descriptions (Cont.)
Pin No.
Pin Name
Description
AN7174K
Equivalent Circuit
12
12
Input Ch.2
Ch.2 input signal applied pin
M
ain
Di
sc te
on na
tin nc
ue e/
d
13
Ripple Filter
Supply ripple rejection pin
14
Output Ch.2
Ch.2 reverse-phase output pin
15
GND (Output Ch.2)
GND pin for Ch.2 output
16
Output Ch.2
Ch.2 positive-phase output pin
13
s
Precautions on use
1.
Thermal breaking protection
The protective operation starts at the chip temperature of 150˚C±5˚C.
2. Overvoltage protection
The protective operation starts at V
CC
– 26V.
3.
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.
Ma
int
en
an
ce
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 2Ω.
/D
The protective operation starts when the contact resistance dropped below 0.3Ω.
5. Atmospheric fault protection
The protective operation starts only when a shortcircuit between pins occurred.
isc
on
tin
Ground fault protection
The protective operation starts when the contact resistance dropped below 0.3Ω.
4. Load shortcircuit protection
Pl
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an ut e
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as lat
cy
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/en at
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.
14
16
ue
di
