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AN7191NZ
ICs for Audio Common Use
AN7191NZ
Dual 20 W BTL audio power amplifier
Overview
The AN7191NZ is an audio power IC developed for
the sound output of car audio (dual 20 W). It is incorpo-
rating various protective circuits to protect the IC from
destruction by GND-open short circuit to GND and power
supply surge which are the important subject of power
IC protection, so the IC will largely contribute to a high
reliability design of equipment. Also, it is incorporating
a perfect muting circuit which is free from shock noise,
so that a shock noise design under the set transient con-
dition can be made easily using together with its standby
function.
Unit : mm
18.00±0.30
13.50±0.30
4.00±0.20
1.50±0.10
f
3.60±0.10
1
15
R0.55
1.27
0.50 +0.20
–0.10
(0.61)
(1.80)
(1.95)
(2.54)
0.25 +0.15
–0.05
Features
· BTL 20 W ´ 2-channel (4 W), G V = 34 dB
· Built-in various protection circuits (thermal protection,
short circuit to V CC and short circuit to GND, V CC -open
short circuit to V CC , GND-open short circuit to GND,
overvoltage and supply surge, and ASO, etc.)
Especially, the supply surge breakdown voltage is 100
V or more.
GND open breakdown voltage is 16 V or more.
· Built-in standby function (free from shock noise at
standby on/off)
· Built-in muting function
Free from shock noise at mute-on/off.
Adapting attenuator method so that abnormal sound due
to waveform deformation is not generated.
Attack time, recovery time are 50 ms or less.
· Reduction in external components
It eliminates the need for NF and BS electrolytic ca-
pacitors.
Muting function is not required, and power supply choke
coil is unnecessary.
· Provided with beep sound input pin
· 2 W load guaranteed
19.00±0.30
19.30±0.30
HZIP015-P-0745A
Applications
· Car audio
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AN7191NZ
ICs for Audio Common Use
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Block Diagram
Ch.1 GND
3
Ref.
14
Ch.2 GND
Ch.1 out (-)
4
13
Ch.2 out (-)
Att.
Protection cct.
Att.
Ch.1 out (+)
2
15
Ch.2 out (+)
Att.con.
Att.
Att.
n
Pin Descriptions
Pin No.
Description
Pin No.
Description
1
Power supply
9
Grounding (input)
2
Ch.1 output (+)
10
Beep sound input
3
Grounding (output ch.1)
11
Ch.2 input
4
Ch.1 output (-)
12
Ripple filter
5
Standby
13
Ch.2 output (-)
6
Ch.1 input
14
Grounding (output ch.2)
7
Muting
15
Ch.2 output (+)
8
Grounding (sub)
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Absolute Maximum Ratings
Parameter
Symbol
Rating
Unit
Supply voltage * 2
V CC
25
V
Peak supply voltage * 3
V surge
80
V
Supply current
I CC
9.0
A
Power dissipation * 4
P D
59
W
Operating ambient temperature * 1
T opr
-
30 to
+
85
°
C
Storage temperature * 1
T stg
-55 to +150
°C
Note) * 1: T a = 25°C except power dissipation, operating ambient temperature and storage temperature.
* 2 : Without signal
* 3 : Time = 0.2 s
* 4: T a = 85°C
2
199606284.003.png
ICs for Audio Common Use
AN7191NZ
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Recommended Operating Range
Parameter
Symbol
Range
Unit
Supply voltage
V CC
8.0 to 18.0
V
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Electrical Characteristics at V CC
=
13.2 V, freq.
=
1 kHz, T a
=
25
°
C
Parameter
Symbol
Conditions
Min Typ Max Unit
Quiescent current
I CQ
V IN = 0 mV, R L = 4 W
¾
120
250
mA
Standby current
I STB
V IN = 0 mV, R L = 4 W
¾
1
10
mA
Output noise voltage *1
V NO
R g = 4.7 kW, R L = 4 W
¾
0.22
0.5 mV[rms]
Voltage gain 1
G V1
V IN = 40 mV, R L = 4 W
32
34
36
dB
Total harmonic distortion 1
THD 1 P o = 0.5 W, R L = 4 W
¾
0.07
0.4
%
Maximum output power 1
P O1
THD = 10%, R L = 4 W
16
18
¾
W
Ripple rejection ratio * 1
RR
R L = 4 W, R g = 4.7 kW, V r = 1 V[rms],
60
72
¾
dB
f r = 1 kHz
Channel balance
CB
V IN = 40 mV, R L = 4 W
¾
0
1
dB
Cross-talk *1
CT
V IN = 40 mV, R L = 4 W, R g = 4.7 kW
55
65
¾
dB
Output offset voltage
V OFF
R g = 4.7 kW, R L = 4 W
- 250
0
250
mV
Muting effect *1
MT
V IN = 40 mV, R L = 4 W
70
82
¾
dB
Input impedance
Z i
V IN = ± 0.3 V DC
22
28
35
kW
Voltage gain 2
G V2
V IN = 40 mV, R L = 2 W
32
34
36
dB
Total harmonic distortion 2
THD 2 P o = 0.5 W, R L = 2 W
¾
0.1
0.5
%
Maximum output power 2
P O2
THD = 10%, R L = 2 W
16
24
¾
W
Shock noise * 2
V S
R L = 4 W, R g = 4.7 kW, V MUTE = 5 V,
- 100
0
100 mV [p-0]
V STB = on/off, 50Hz HPF-on
Total harmonics distortion 3
THD 3 V IN = 10 mV, f IN = 20 kHz, R g = 4.7 kW,
¾
0.10
0.5
%
R L = ¥
Note) * 1 : Measurement using a bandwidth 15 Hz to 30 kHz (12 dB/OCT) filter.
* 2 : For V STB = on/off, change over the standby terminal by the voltages of 0 V and 5 V at the time shown in the right.
Standby terminal voltage
5 V
0 V
120 ms
120 ms
3
199606284.004.png
AN7191NZ
ICs for Audio Common Use
n
Terminal Equivalent Circuits
Pin No.
Equivalent circuit
Description
DC voltage
1
¾
Power supply connection pin
13.2 V
2
1
Pre-amp.
Ch.1 output pin (+) :
6.6 V
Drive circuit
Ch.1 positive-phase output pin.
2
Drive circuit
V REF = 6.6 V
3
30 kW
1.2 kW
3
¾
GND (Output) :
0 V
Grounding pin for ch.1 output.
4
1
Pre-amp.
Ch.1 output pin (-) :
6.6 V
Drive circuit
Ch.1 reverse-phase output pin.
4
Drive circuit
V REF
=
6.6 V
3
30 kW
1.2 kW
5
5
Standby control pin :
¾
Standby changeover pin threshold
voltage approx. 2.1 V.
10 kW
900 W
6
6
Ch.1 input pin :
0 mV to
Approx.
15 mA
Approx.
15 mA
Ch.1 input signal applied pin input
10 mV
impedance 30 kW.
200 W
400 W
30 kW
7
Mute control pin :
¾
7
Mute changeover pin threshold volt-
age approx. 2.0 V.
5 kW
4
199606284.005.png 199606284.006.png
ICs for Audio Common Use
AN7191NZ
n
Terminal Equivalent Circuits (continued)
Pin No.
Equivalent circuit
Description
DC voltage
8
¾
GND (sub) :
0 V
Being connected to substrate only.
9
¾
GND (input) :
0 V
Ground pin for input.
10
1.2 k
W
30 k
W
Beep sound input pin :
2.1 V
Beep sound signal input pin.
Input impedance 10 kW.
V REF = 2.1 V
1.2 kW
2
20 k
W
10
20 kW
1.2 k
W
15
1.2 kW
30 kW
V REF = 2.1 V
11
11
Ch.2 input pin :
1 mV to
Ch.2 input signal applied pin.
10 mV
Approx.
15 mA
Approx.
15 mA
Input impedance 30 kW.
200 W
400 W
30 kW
12
V CC
Ripple filter pin :
13.0 V
Output current 3 mA to 10 mA.
30 kW
12
1.2 mA
40 kW
200 mA
13
Ch.2 output pin (-) :
6.6 V
1
Pre-amp.
Ch.2 reverse-phase output pin.
Drive circuit
13
Drive circuit
V REF = 6.6 V
15
30 kW
1.2 kW
14
¾
GND (output) :
0 V
Ground pin for ch.2 output.
5
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