Panasonic AN7171K Dual btl 14w audio power amplifier circuit Datasheet

ICs for Audio Common Use
AN7171NK, AN7176K
Dual BTL 14W Audio Power Amplifier Circuits
■ Overview
ø 3.6
The AN7171NK and AN7176K are ICs for power amplification 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 providing high reliability. The circuits can be turned on or off
with supply pins energized, because the stand-by circuit
is built-in.
5.9±0.25 7.7±0.3
1
1.45±0.25
1.8±0.25
(1.2)
NF (Ch.1)
8
Ripple Filter
13
7
Input
Circuit
(Ch.1) IN
6
Input
Circuit
STAND-BY
5
Stand-by
Circuit
(Ch.2) IN
12
Input
Circuit
GND
Output
Circuit
Output
Circuit
4
OUT (Ch.1) (+)
3
GND
2
OUT (Ch.1) (–)
16
OUT (Ch.2) (+)
15
GND
14
OUT (Ch.2) (–)
Protection Circuit
Driver
Circuit
Input
Circuit
10
Driver
Circuit
Driver
Circuit
11
9
NF
(Ch.2)
NF
(Ch.2)
Output
Circuit
Driver
Circuit
3.5±0.3
1.45±0.25
Fin-attached 16-lead ZIP package (EZIP016-P-0660)
■ Block Diagram
NF (Ch.1)
2.66
(4.06)
(0.25)
1.2±0.1
12.5±0.3
(14.1)
2.54±0.8
2.8±0.3
temperature, or against
over-voltage, short-circuit between output and earth
and between output and VCC, load short-circuit)
• Small shock noise at power ON/OFF
• Fewer external components required
• Good oscillation stability
1
29.6±0.3
0.6±0.2
1.778
R1.8
20.0±0.25
0.6
29.96±0.3
28.0±0.3
16
■ Features
• Two BTL 14W outputs built-in
• Stand-by circuit built-in
• Various protective circuits (for
VCC
Unit : mm
7.8±0.5
6.33±0.5
Output
Circuit
ICs for Audio Common Use
AN7171NK, AN7176K
■ Pin Descriptions
Pin No.
Pin Name
Pin No.
Pin Name
1
VCC
9
Negative Feedback Ch.2
2
Output Ch.1 (+)
10
GND (Input)
3
GND (Output Ch.1)
11
Negative Feedback Ch.2
4
Output Ch.1 (–)
12
Input Ch.2
5
Stand-by
13
Ripple Filter
6
Input Ch.1
14
Output Ch.2 (–)
7
Negative Feedback Ch.1
15
GND (Output Ch.2)
8
Negative Feedback Ch.1
16
Output Ch.2 (+)
■ Absolute Maximum Ratings (Ta= 25˚C)
Parameter
Symbol
Rating
Unit
VCC Note 1)
24
V
VCC (surge) Note 2)
50.0
V
ICC
6.0
A
Supply Voltage
Peak Supply Voltage
Supply Current
PD
Power Dissipation
37.5
Note 3)
Note 4)
W
Operating Ambient Temperature
Topr
– 30 ~ + 75
˚C
Storage Temperature
Tstg
– 55 ~ + 150
˚C
Note 1)
Note 2)
Note 3)
Note 4)
When no signals
Time = 0.2s
Rθj – c = 2˚C/W
Ta = 75˚C
■ Recommended Operating Range (Ta = 25˚C)
Parameter
Symbol
Range
Operating Supply Voltage Range
VCC
8.0V ~ 18.0V
■ Electrical Characteristics (VCC = 13.2V, RL= 4Ω, f = 1kHz, Ta = 25˚C)
Parameter
Symbol
Condition
min.
typ.
max.
Unit
Quiescent Current
ICQ
Vin= 0mV
120
200
Output Noise Voltage Note)
Vno
Vin= 0mV, Rg= 10kΩ
0.60
1.50 mVrms
Voltage Gain
GV
Vin= 5mV
52.5
54.5
Total Harmonic Distortion
THD
Vin= 5mV
0.20
0.75
Max. Output Power (4Ω)
PO
THD= 10%
9.0
12.5
W
Ripple Rejection Ratio Note)
RR
Rg= 0Ω, Vin= 0mV,
Ripple= 300mVrms, 120Hz
35
40
dB
–200
0
+ 200
mV
–1
0
+1
dB
Output Offset Voltage
Channel Balance
VO (offset)
CB
50.5
Rg= 0Ω
Vin= 5mV
mA
dB
%
THD
Vin= 5mV, 100Hz
0.26
Total Harmonic Distortion
THD
Vin= 5mV, 10kHz
0.45
%
Frequency Characteristics
fCH
Vin= 5mV, –3dB down
22
kHz
Frequency Characteristics
fCL
Vin= 5mV, –3dB down
Total Harmonic Distortion
Stand-by Current
Crosstalk
ISTB
Stand-by Pin ON
CT
Vin= 5mV, Rg= 10kΩ
Note) With 15Hz to 30kHz (12dB/OCT) filter
AN7171NK
AN7176K
400
%
21
Hz
21
µA
650
61
1000
µA
dB
ICs for Audio Common Use
AN7171NK, AN7176K
GV, THD – f
Output Power PO (W)
Max. Output PO (W)
10
12
8
10
PO
1.0
1.0
0.1
0.1
THD
4
Total Harmonics Distortion THD (%)
VCC = 13.2V
RL = 4Ω
f = 1kHz
f = 1kHz
THD = 10%
RL = 4Ω
16
100
Voltage Gain GV (dB)
PO, THD – Vin
100
54
52
GV
50
48
46
1.0
VCC = 13.2V
0.8
RL = 4Ω
PO = 1W
0.6
0.4
THD
0.2
0
8
4
12
16
0.01
0.1
20
1
Supply Voltage VCC (V)
0
100k
Frequency f (Hz)
48
6
46
5
44
4
42
3
40
2
38
1
THD
6
7
8
9
Supply Voltage VCC (V)
10
0
11
160
Quiescent Current ICQ (mA)
7
Total Harmonics Distortion THD (%)
Voltage Gain GV (dB)
8
5
10k
9
GV
50
4
1k
ICQ – VCC
52
3
100
200
10
36
10
Input Voltage Vin (mV)
GV, THD – VCC
f = 1kHz
RL = 4Ω
Vin = 3mV
0.01
100
10
Total Harmonics Distortion THD (%)
PO – VCC
20
120
80
40
0
4
8
12
16
20
Supply Voltage VCC (V)
■ 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 VCC26V.
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 VCC is set high or when the load is 2Ω.
ICs for Audio Common Use
ICs for Audio Common Use
■ Application Circuit
VCC =13.2V
+
1
IN Ch.1
–
+
6
2
1µF
100µF
2000µF
–
VCC Pin
+
–
8
0.047µF
4
GND (Input side)
10
AN7171NK
13
AN7176K
IN Ch.2
2.2Ω
+
–
+
Ripple Filter Pin
200µF
12
16
1µF
100µF
0.1µF
0.1
µF
2.2Ω
200Ω
–
OUT Ch.1
4Ω
3
GND
7
+
–
9
OUT Ch.2
4Ω
15
GND
11
14
0.047µF
0.1
µF
2.2Ω
200Ω
0.1µF
2.2Ω
5
(STAND-BY)
+5V (Stand-by mode)
AN7171NK :
AN7176K :
0V
+5V
0V (Stand-by mode)
■ Printed Circuit Board Layout
AN7171NK, AN7176K
2.2Ω
GND
0.1µF
OUT 2–1
2000µF
100µF
+ –
100µF
0.1µF
OUT 2–2
1µF
+
–
IN 2
0.047µF
200Ω
0.047µF
1µF
OUT 1–1
–
200µF
+
– +
2.2Ω
200Ω
0.1µF
2.2Ω
0.1µF
2.2Ω
IN 1
MUTE
OUT 1–2
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