ICs for Audio Common Use
AN7171NK, AN7176K
Dual BTL 14W Audio Power Amplifier Circuits
s
Overview
The AN7171NK and AN7176K are ICs for power ampli-
fication of 14W (13.2V, 4Ω) output. It can provide stereo
operation since two BTL amplifiers are incorporated in a
chip. It incorporates various protective circuits, thus pro-
viding high reliability. The circuits can be turned on or off
with supply pins energized, because the stand-by circuit
is built-in.
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
29.96±0.3
28.0±0.3
20.0±0.25
0.6
R1.8
temperature, or against
over-voltage, short-circuit between output and earth
and between output and V
CC
, load short-circuit)
•
Small shock noise at power ON/OFF
•
Fewer external components required
•
Good oscillation stability
1.2±0.1
(0.25)
1.45±0.25
1.8±0.25
(1.2)
1.45±0.25
Fin-attached 16-lead ZIP package (EZIP016-P-0660)
s
Block Diagram
NF (Ch.1)
8
V
CC
Ripple Filter
(Ch.1) IN
1
13
6
Input
Circuit
Stand-by
Circuit
Input
Circuit
Driver
Circuit
Output
Circuit
NF (Ch.1)
7
Input
Circuit
Driver
Circuit
Output
Circuit
4
3
2
OUT (Ch.1) (+)
GND
OUT (Ch.1) (–)
STAND-BY
5
Protection Circuit
(Ch.2) IN
12
Driver
Circuit
Output
Circuit
16
15
OUT (Ch.2) (+)
GND
OUT (Ch.2) (–)
GND
10
Input
Circuit
11
NF
(Ch.2)
9
NF
(Ch.2)
Driver
Circuit
Output
Circuit
14
2.54±0.8
s
Features
•
Two BTL 14W outputs built-in
•
Stand-by circuit built-in
•
Various protective circuits (for
1.778
1
2.8±0.3
12.5±0.3
(14.1)
2.66
(4.06)
3.5±0.3
29.6±0.3
ICs for Audio Common Use
s
Pin Descriptions
Pin No.
1
2
3
4
5
6
7
8
V
CC
Output Ch.1 (+)
GND (Output Ch.1)
Output Ch.1 (–)
Stand-by
Input Ch.1
Negative Feedback Ch.1
Negative Feedback Ch.1
Pin Name
Pin No.
9
10
11
12
13
14
15
16
Pin Name
Negative Feedback Ch.2
GND (Input)
Negative Feedback Ch.2
Input Ch.2
Ripple Filter
Output Ch.2 (–)
GND (Output Ch.2)
Output Ch.2 (+)
AN7171NK, AN7176K
s
Absolute Maximum Ratings
(Ta= 25˚C)
Parameter
Supply Voltage
Peak Supply Voltage
Supply Current
Power Dissipation
Operating Ambient Temperature
Storage Temperature
Note 1) When no signals
Note 2) Time = 0.2s
Note 3) R
θj
– c
= 2˚C/W
Note 4) Ta = 75˚C
Symbol
V
CC
Note 1)
Rating
24
50.0
6.0
37.5
Note 4)
– 30 ~ + 75
– 55 ~ + 150
Unit
V
V
A
W
˚C
˚C
V
CC (surge) Note 2)
I
CC
P
D Note 3)
T
opr
T
stg
s
Recommended Operating Range
(Ta = 25˚C)
Parameter
Operating Supply Voltage Range
Symbol
V
CC
Range
8.0V ~ 18.0V
s
Electrical Characteristics
(V
CC
= 13.2V, R
L
= 4Ω, f = 1kHz, Ta = 25˚C)
Parameter
Quiescent Current
Output Noise Voltage
Note)
Voltage Gain
Total Harmonic Distortion
Max. Output Power (4Ω)
Ripple Rejection Ratio
Note)
Output Offset Voltage
Channel Balance
Total Harmonic Distortion
Total Harmonic Distortion
Frequency Characteristics
Frequency Characteristics
Stand-by Current
Crosstalk
Note)
Symbol
I
CQ
V
no
G
V
THD
P
O
RR
V
O (offset)
CB
THD
THD
f
CH
f
CL
I
STB
CT
V
in
= 0mV
V
in
= 0mV, R
g
= 10kΩ
V
in
= 5mV
V
in
= 5mV
THD= 10%
R
g
= 0Ω, V
in
= 0mV,
Ripple= 300mVrms, 120Hz
R
g
= 0Ω
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
= 10kΩ
AN7171NK
AN7176K
400
9.0
35
–200
–1
50.5
Condition
min.
typ.
120
0.60
52.5
0.20
12.5
40
0
0
0.26
0.45
22
21
21
650
61
1000
+ 200
+1
max.
200
54.5
0.75
Unit
mA
dB
%
W
dB
mV
dB
%
%
kHz
Hz
µA
µA
dB
1.50 mVrms
With 15Hz to 30kHz (12dB/OCT) filter
AN7171NK, AN7176K
P
O
– V
CC
20
f = 1kHz
THD = 10%
R
L
= 4Ω
10
Output Power P
O
(W)
Max. Output P
O
(W)
100
V
CC
= 13.2V
R
L
= 4Ω
f = 1kHz
10
ICs for Audio Common Use
P
O
, THD – V
in
Voltage Gain G
V
(dB)
100
54
52
50
48
46
G
V
, THD – f
G
V
16
Total Harmonics Distortion THD (%)
12
P
O
1.0
1.0
8
1.0
V
CC
= 13.2V
0.8
R
L
= 4Ω
P
O
= 1W
0.6
0.4
THD
0.2
0.1
4
THD
0.1
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)
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
THD
36
3
4
5
6
7
8
9
10
9
Total Harmonics Distortion THD (%)
G
V
8
7
6
5
4
3
2
1
0
11
0
4
8
160
Quiescent Current I
CQ
(mA)
200
I
CQ
– V
CC
120
80
40
12
16
20
Supply Voltage V
CC
(V)
Supply Voltage V
CC
(V)
s
Precautions on use
1.
Always attach an outside heat sink to use the chip. In addition, the outside heat sink must be fastened onto a chassis for use.
2. Connect the radiation fin to the GND potential.
3. Prevent atmospheric and ground faults, and load short-circuit.
4. The temperature protective circuit gets actuated when Tj = approx. 150˚C, but it is automatically reset when the chip
temperature drops below the above set level.
5. The overvoltage protective circuit starts the protective operation at V
CC
26V.
6. The ground fault protective circuit starts the protective operation at 0.3Ω or less of contact resistance.
7. The load short-circuit protective circuit starts the protective operation at 0.3Ω or less of contact resistance.
8. The atmospheric fault protective circuit protects the chip only from short-circuit between pins.
9. Take into consideration the heat radiation design particularly when V
CC
is set high or when the load is 2Ω.
Total Harmonics Distortion THD (%)
ICs for Audio Common Use
s
Application Circuit
+
ICs for Audio Common Use
V
CC
=13.2V
2000µF
V
CC
Pin
IN Ch.1
–
+
–
1
6
2
+
–
1µF
100µF
0.047µF
200Ω
GND (Input side)
IN Ch.2
–
+
8
GND
3
4
0.1
µF
2.2Ω
7
OUT Ch.1
4Ω
0.1µF
2.2Ω
Ripple Filter Pin
200µF
AN7171NK
13
10
AN7176K
12
16
+
–
1µF
100µF
0.047µF
200Ω
5
+
–
9
GND
15
14
0.1
µF
2.2Ω
11
OUT Ch.2
4Ω
0.1µF
2.2Ω
(STAND-BY)
+5V (Stand-by mode)
AN7171NK :
AN7176K :
0V
+5V
0V (Stand-by mode)
s
Printed Circuit Board Layout
AN7171NK, AN7176K
2.2Ω
0.1µF
OUT 2–1
100µF
100µF
– +
2.2Ω
0.1µF
1µF
200µF
0.047µF
0.047µF
1µF
OUT 1–1
+
GND
2000µF
+ –
–
OUT 2–2
+
–
200Ω
200Ω
0.1µF
2.2Ω
0.1µF
IN 2
IN 1
MUTE
OUT 1–2
2.2Ω
