Panasonic AN7195 Dual 15 w btl power ic for car audio Datasheet

ICs for Audio Common Use
AN7195K
Dual 15 W BTL power IC for car audio
■ Overview
Unit : mm
φ3.6
29.6±0.3
1.788 (0.889)
1.45±0.15
0.25 -0.05
+0.10
R0.7
(1.2)
(14.1)
(17.63)
(18.7)
(21.5)
3.5±0.2
(2.54)
1
(12.5)
1.80±0.15
(10.0)
R1.8
(0.6)
1.2+0.1
(1.1)
(0.889)
(10.0)
0.6 +0.15
-0.10
16
11.3±0.3
7.7±0.3
29.75±0.3
28.0±0.3
20.0±0.3
The AN7195K is an audio power IC developed for the
sound output of car audio (dual 15 W).
It is incorporating various protection circuits to protect the IC from destruction by GND-open short-circuit
to GND and power supply surge which are the most important subjects of power IC protection, and the IC will
largely contribute to a high reliability design of equipment.
It is also incorporating the industry's first excellent
muting circuit, which is free from shock noise, so that a
shock noise design under the set transient condition can
be made easily when the muting circuit is used together
with its standby function.
In addition, the AN7195K is pin compatible with the
AN7190NK (dual 20 W), so that the identical pattern
design is allowed for high-class types as well as popular
types.
HZIP016-P-0665A
■ Features
• Built-in various protection circuits (realizing high breakdown voltage against destruction )
Power supply surge breakdown voltage of 100 V or more
Ground -open breakdown voltage of 14 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 of 50 ms or less
• Reduction in external components (parts reduction to
half compared with the AN7176K)
It eliminates the need for NF and BS electrolytic capacitors,
Muting function is unnecessary
Power supply choke coil is unnecessary
• Provided with beep sound input pin
• High sound quality design
• Pin compatible with the AN7190NK (dual 20 W)
■ Applications
• Car audio
1
ICs for Audio Common Use
Ripple filter
AN7195K
1
12
VCC
■ Block Diagram
3
Ch.1 GND
14
Ref.
4
Ch.1 Out (−)
13
Protection Cct.
Att.
15
Att.Con.
Ch.2 Out (+)
9
16
GND(input)
N.C.
11
Ch.2 In
7
Att.
Mute
5
Standby
6
Ch.1 In
GND(sub)
Beep In
8
10
Att.
Ch.2 Out (−)
Att.
2
Ch.1 Out (+)
Ch.2 GND
■ 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)
16
N.C.
■ Absolute Maximum Ratings
Parameter
Supply voltage
*2
Peak supply voltage
*3
Supply current
Power dissipation
*4
Operating ambient temperature
Storage temperature
Note) *1 :
*2 :
*3 :
*4 :
2
*1
*1
Symbol
Rating
Unit
VCC
25
V
Vsurge
80
V
ICC
9.0
A
PD
32.5
W
Topr
−30 to +85
°C
Tstg
−55 to +150
°C
All items are at Ta = 25°C, except for the operating ambient temperature and storage temperature.
Without signal
Time = 0.2 s
Ta = 85°C
ICs for Audio Common Use
AN7195K
■ Recommended Operating Range
Parameter
Symbol
Range
Unit
VCC
8.0 to 18.0
V
Supply voltage
■ Electrical Characteristics at VCC = 13.2 V, f = 1 kHz, Ta = 25°C
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
ICQ
VIN = 0 mV, RL = 4 Ω

120
250
mA
ISTB
VIN = 0 mV, RL = 4 Ω

1
10
µA
VNO
Rg = 4.7 kΩ, RL = 4 Ω

0.22
0.5
mV[rms]
GV1
VIN = 20 mV, RL = 4 Ω
38
40
42
dB
Total harmonic distortion 1
THD1
VIN = 20 mV, RL = 4 Ω

0.07
0.4
%
Maximum output power 1
PO1
THD = 10%, RL = 4 Ω
12
14

W
RR
RL = 4 Ω, Rg = 4.7 kΩ,
Vr = 1 V[rms], fr = 1 kHz
60
70

dB
CB
VIN = 20 mV, RL = 4 Ω

0
1
dB
CT
VIN = 20 mV, RL = 4 Ω,
Rg = 4.7 kΩ
55
65

dB
VOff
Rg = 4.7 kΩ, RL = 4 Ω
−300
0
300
mV
MT
VIN = 20 mV, RL = 4 Ω
70
82

dB
VIN = ± 0.3 VDC
22
30
35
kΩ
GV2
VIN = 20 mV, RL = 2 Ω
38
40
42
dB
Total harmonic distortion 2
THD2
VIN = 20 mV, RL = 2 Ω

0.1
0.5
%
Maximum output power 2
PO2
THD = 10%, RL = 2 Ω
12
20

W
VS
RL = 4 Ω, Rg = 4.7 kΩ
VSTB = on/off, 50 Hz HPF-on
−100
0
100 mV[p-0]

0.10
Quiescent current
Standby current
Output noise voltage
*1
Voltage gain 1
Ripple rejection ratio
*1
Channel balance
Cross-talk
*1
Output offset voltage
Muting effect
*1
Input impedance
Zi
Voltage gain 2
Shock noise
*2
Total harmonic distortion 3
THD3
VIN = 10 mV, fIN = 20 kHz
Rg = 4.7 kΩ, RL = ∞
0.5
%
Note) *1 : Measurement using a bandwidth 15 Hz to 30 kHz (12 dB/OCT) filter.
*2 : For VSTB = on/off, change over the standby terminal by the voltages of 0 V and 5 V at the time shown below.
Standby terminal voltage
5V
0V
500 ms
500 ms
3
AN7195K
ICs for Audio Common Use
■ Terminal Equivalent Circuits
Pin No.
Equivalent circuit
1

Description
Supply voltage pin
DC Voltage
13.2 V
Supply connection pin
2
Ch.1 output pin (+)
1
6.6 V
Pre-amp.
Drive circuit
Ch.1 positive-phase output pin
2
Drive circuit
3
VREF = 6.6 V
300 Ω
15 kΩ

3
GND (output)
0V
Grounding pin for ch.1 output
4
Ch.1 output pin (−)
1
6.6 V
Pre-amp.
Drive circuit
Ch.1 inverted-phase output pin
4
Drive circuit
3
VREF = 6.6 V
300 Ω
15 kΩ
5
Standby control pin
5
10 kΩ

Standby changeover pin
Threshold voltage approx. 2.1 V
900 Ω
6
Ch.1 input pin
6
200 Ω
30 kΩ
4
Approx. Approx.
15 µA 15 µA
400 Ω
Ch.1 input signal applied pin
Input impedance 30 kΩ
0 mV to10 mV
ICs for Audio Common Use
AN7195K
■ Terminal Equivalent Circuits (continued)
Pin No.
Equivalent circuit
Description
7
Mute control pin
DC Voltage

7
Mute changeover pin
5 kΩ
Threshold voltage approx. 2.0 V

8
GND (substrate)
0V
Being connected with substrate only

9
GND (input)
0V
Ground pin for input
10
300 Ω
VREF = 2.1 V
Beep sound input pin
15 kΩ
300 Ω
15
2.1 V
Beep sound signal input pin
Input impedance 25 kΩ
25 kΩ
25 kΩ
10
300 Ω
VREF = 2.1 V
300 Ω
2
15 kΩ
11
Ch.2 input pin
0 mV to10 mV
11
Approx. Approx.
15 µA 15 µA
200 Ω
400 Ω
Ch. 2 input signal applied pin
Input impedance 30 kΩ
30 kΩ
12
Ripple filter pin
13.0 V
VCC
30 kΩ
Output current 3 mA to 10 mA
12
Quick
discharge
circuit
200 µA
20 kΩ
5
AN7195K
ICs for Audio Common Use
■ Terminal Equivalent Circuits (continued)
Pin No.
13
Equivalent circuit
Description
Ch.2 output pin (−)
1
DC Voltage
6.6 V
Pre-amp.
Drive circuit
Ch.2 inverted-phase output pin
13
Drive circuit
15
15 kΩ
VREF = 6.6 V
300 Ω

14
GND(output)
0V
Grounding pin for ch.2 output
15
Ch.2 Output pin (+)
1
6.6 V
Pre-amp.
Drive circuit
Ch.2 positive-phase output pin
14
Drive circuit
15
15 kΩ
VREF = 6.6 V
300 Ω

16
N.C.

Non-connection
■ Usage Notes
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 cooling fin to GND potential.
3. Avoid short-circuit to VCC and short-circuit to GND, and load short-circuit.
4. The temperature protection circuit will be actuated at Tj = approx. 150°C, but it is automatically reset when the
chip temperature drops below the above set level.
5. The overvoltage protection circuit starts its operation at VCC = approx. 20 V.
6. Take into consideration the heat radiation design particularly when VCC is set high or when the load is 2 Ω.
7. When the beep sound function is not used, open the beep sound input pin (pin 10) or connect it to pin 9 with
around 0.01 µF capacitor.
6
ICs for Audio Common Use
AN7195K
■ Technical Information
[1] PD  Ta curves of HZIP016-P-0665A
PD  T a
65
Infinity heat sink
62.5
60
Rth (j−c) = 2°C/W
Rth (j−a) = 42°C/W
55
Power dissipation PD (W)
50
45
41.7
40
1°C/W heat sink
35
31.3 2°C/W heat sink
30
25
3°C/W heat sink
20 5°C/W heat sink
17.9
15
10.4 10°C/W heat sink
10
5 Without heat sink
3.0
0
0
25
50
75
100
125
150
Ambient temperature Ta (°C)
[2] Application note
1. Standby function
1) The power can be turned on or off by
Table 1
making pin 5 (standby terminal) high
or low.
Terminal state
Terminal voltage
Power
2) The standby terminal has threshold
voltage of approx. 2.1 V, however, it
Open
0V
Standby state
has temperature dependency of
approx. − 6 mV/°C. The recommended
Low
0 V to 1.0 V
Standby state
High
Higher than 3 V
Operating state
range of use is shown in table 1.
3) The internal circuit of standby terminal is as shown in figure 1. When the standby terminal is high, the current
approximately expressed by the following equation will flow into the circuit.
ISTB =
VSTB−2.7 V
[mA]
10 kΩ
5V
VSTB
10 kΩ
5
Protection
circuit
RF
Constant
current source
0V
Sub
3.5 kΩ
3.5 kΩ
3.5 kΩ
3.5 kΩ
Figure 1
4) A power supply with no ripple component should be used for the control voltage of standby terminal .
7
AN7195K
ICs for Audio Common Use
■ Technical Information (continued)
[2] Application note (continued)
1
2. Oscillation countermeasures
1) In order to increase the oscillation allowance, connect a capacitor and
a resistor in series between each output terminal and GND as shown
in figure 2.
2) The use of polyester film capacitor having a little fluctuation with
temperature and frequency is recommended as the 0.1 µF capacitor
To speaker
2,4
13,15
for oscillation prevention.
0.1 µF
2.2 Ω
3,14
Figure 2
3. Input terminal
1) The reference voltage of input terminal is 0 V. When the input signal has a reference voltage other than 0 V
potential, connect a coupling capacitor (of about several µF) for DC component cut in series with the input
terminal. Check the low-pass frequency characteristics to determine the capacitor value.
2) 10 kΩ or less of signal source impedance Rg can reduce the output end noise voltage.
3) The output offset voltage fluctuates when the signal source impedance Rg is changed. A care must be taken
when using the circuit by directly connecting the volume to the input terminal. In such a case, the use of
coupling capacitor is recommended.
4) If a high frequency signal from tuners enters the input terminal as noise, insert a capacitor of approx. 0.01 µF
between the input terminal and input GND.
When a high frequency signal is inputted, malfunction in protective circuits may occur.
15 µA
1 µF
Input signal
0.01 µF
6
4.7 kΩ 11
200 Ω
15 µA
400 Ω
30 kΩ
To power
Attenuator
Figure 3
4. Ripple filter
1) In order to suppress the fluctuation of supply voltage, connect a capacitor of approx. 33 µF between RF
terminal (pin12) and GND.
2) Relation between RR (Ripple Rejection Ratio) and a capacitor
The larger the capacitance of the ripple filter is, the better the ripple rejection becomes.
3) Relation between the rise time of circuit and a capacitor
The larger the capacitance of the ripple filter is, the longer the time from the power on (standby high) to the
sound release becomes.
4) The DC voltage of output terminal is approximately the middle point of the ripple filter terminal voltage.
5) The internal circuit of ripple filter terminal is as shown in figure 4 and the charge current is approx. 3 mA to
10 mA.
6) The muting circuit turns on when the ripple filter terminal is VCC − 4 VBE or less.
For that reason, abnormal sound due to waveform distortion at rising and falling of the circuit is not released.
8
ICs for Audio Common Use
AN7195K
■ Technical Information (continued)
[2] Application note (continued)
4. Ripple filter (continued)
VCC
30 kΩ
Constant
current source
Protection
circuit
12
33 µF
Detection
circuit
200 µA
10 kΩ
30 kΩ
10 kΩ
Quick discharge
circuit
VREF
To muting circuit
3.5 kΩ
3.5 kΩ
Figure 4
5. GND terminal
1) Be sure to short-circuit each GND terminal of
pin 3, 8, 9 and 14 at the outside of the IC in use.
2) For each GND terminal, the one-point earth,
referenced to the GND connection point of
electrolytic capacitor between the supply ter-
AN7195K
1
3
8
9
14
minal and GND, is most effective for reducing the distortion. Even in the worst case,
ground pin 8, 9 of input GND separately from
all the other GND terminals.
To GND of input
Figure 5
3) Each GND terminal is not electrically short-circuited inside. Only pin 8 is connected with substrate.
4) Pin 9 is input signal GND. Connect only pin 9 with Pre-GND.
6. Cooling fin
1) The cooling fin is not connected with GND terminal by using Au wire. Only pin 8 is electrically connected
through substrate.
2) Always attach an outside heat sink to the cooling fin. The cooling fin must be fastened onto a chassis for use.
Otherwise, IC lead failure may occur.
3) Do not give the cooling fin any potential other than the GND potential. Otherwise, it may cause breakdown.
4) Connection of the cooling fin with GND can reduce the incoming noise hum. (It is unnecessary to connect
with GND in use, but connect with the power GND when the cooling fin is connected with GND)
7. Shock noise
1) STB on/off
No shock noise is released. However, the changeover switch of the standby terminal may make a slight
shock noise. In such a case, insert a capacitor of approx. 0.01 µF between the standby terminal and GND.
2) Mute on/off
No shock noise is released. Refer to the section on the mute function.
9
AN7195K
ICs for Audio Common Use
■ Technical Information (continued)
[2] Application note (continued)
8. Mute Function
1) The mute-on/off is possible by making pin 7 (the muting terminal) high or low.
←
2) The muting circuit is as shown in figure 6. The amplifier gain including attenuator block is given in the
following equation :
I1
× 50
GV =
I2
Original gain
From the above equation, the amplifier gain can be made as 0 time by setting I1 at 0 mA at muting.
3) The threshold voltage of VMUTE is as follows :
Mute-off : approx. 1 V or less
Mute-on : approx. 3 V or more
I1
Input
Mute/on
5V
4.7 kΩ
VMUTE
0V
Mute/off
I2
10 µF
Output stage
I1
7
I2
5 kΩ
Output stage
Attenuator block
I1 = approx.120 µA
I2 = approx.120 µA
Figure 6
4) Attack time and recovery time can be changed by the external CR of pin 7. For recommended circuits (In
figure 6 4.7 kΩ,10 µF), the above mentioned times are as follows :
Attack time
: Approx. 30 ms
Recovery time : Approx. 40 ms
However, the control voltage of VMUTE is assumed to be 5 V. When it is not directly controlled by
microcomputer (5 V), (that is, 13.2 V separate power supply), it is necessary to change CR values because the
above times change.
5) When the attack time and recovery time are set at 20 ms or less, pay attention to the IC with larger output
offset because it may release the shock noise.
9. Voltage gain
The voltage gain is fixed at 40 dB and can not be changed by the addition of an external resistor.
10
ICs for Audio Common Use
AN7195K
■ Technical Information (continued)
[2] Application note (continued)
10. Beep sound input function
1) The application circuit using the beep sound input is shown in figure 7. Connect the beep signals from the
microcomputer to pin 10 via the capacitor C1 for DC cut and the resistor R1 for voltage gain adjustment.
2) The voltage gain of beep sound terminal is approx. −4.5 dB. With settings shown in the following drawing,
it is approx.−19 dB (f = 1 kHz).
3) The beep signal is outputted to output terminals, pins 2 and 15 only.
300 Ω
VREF = 2.1 V
34 dB
2
47 kΩ 10
C1
Beep input
25 kΩ
0.022 µF R1
150
GV =
× 50
25 k+300
1/jωC1+R1+
2
25 kΩ
15
300 Ω
VREF = 2.1 V
34 dB
Figure 7
11. Two IC use
Figure 8 shows the application circuit example when two ICs are used :
Out(RR)
4.7 kΩ
Power supply
15
13
11
9
7
5
3
1
2 200 µF
Standby
0.1 µF 0.1 µF
2.2 Ω
14
12
10
8
6
2
4
2.2 kΩ
Mute
Out(FR)
22 µF
0.1 µF 0.1 µF
47 µF
4.7 kΩ
Out(RL)
S-GND
15
1 µF
13
11
9
1 µF
7
In(FL)
0.1 µF 0.1 µF
14
12
10
8
6
4
2
2.2 Ω
0.022 µF
2.2 Ω
4.7 kΩ
1 µF
5
In(RL)
2.2 Ω
1 µF
3
In(FR)
1
In(RR)
2.2 Ω
2.2 Ω
Out(FL)
In(FL)
47 kΩ
0.1 µF 0.1 µF
4.7 kΩ
2.2 Ω
2.2 Ω
Figure 8
11
AN7195K
ICs for Audio Common Use
■ Technical Information (continued)
[2] Application note (continued)
11. Two IC use (continued)
1) Supply terminal
Short-circuiting each other, insert an electrolytic capacitor of approx. 2 200 µF into the supply terminals.
However, if sufficient characteristics of the ripple rejection can not be obtained, use an even larger capacitor
or insert a 2 200 µF capacitor into each IC.
The best sound quality can be obtained by inserting a 2 200 µF capacitor near the terminal of each IC.
2) Standby terminal (pin 5)
Even if the standby terminals are connected with each other, that does not result in an abnormal operation.
Connect with the microcomputer after connecting the standby pins with each other. At that time, the current
flowing into the standby terminal is twice as large as the current which is described in 1. Standby function.
3) Muting terminal (pin 7)
An abnormal operation does not occur even if the muting terminals are short-circuited with each other.
The muting time constant changes when two ICs connection is made. If the CR constants are set at twice
and 1/2 time respectively, the time constant value becomes as same as the value when one IC is used.
4) Beep sound input terminal (pin 10)
Even if the the beep sound input terminals are short-circuited each other, that does not result in an abnormal
operation.
However, if there is a temperature difference between ICs, there may be a fluctuation of the output offset.
In order to avoid such a phenomenon, connect the ICs with each other through a resistor (47 kΩ).
5) Ripple filter terminal (pin 12)
Even if the ripple filter terminals are short-circuited each other, that does not result in an abnormal
operation.
However, if the standby of each IC is individually controlled, the short-circuiting is not allowed. Use the
circuit after connecting a capacitor (33 µF) to each IC.
6) If one IC is used as a combination of L or R of the front and the rear, the cross-talk between the L and R
increases. The circuit shown by figure 8 becomes thermally advantageous when there is a difference in the
12 Ripple filter
output between the front and rear.
7) Arrangement of IC
The larger the distance between the two ICs is, the more advantageous the heat radiation design becomes.
1 VCC
■ Application Circuit Example
15 Ch.2 Out (+)
GND(input)
N.C.
Mute
Ch.1 In
GND(sub)
12
9
2
16
Ch.1 Out (+)
Ch.2 In 11
13 Ch.2 Out (−)
7
4
Standby 5
Ch.1 Out (−)
6
14 Ch.2 GND
Beep In 10
3
8
Ch.1 GND
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