AN7195Z [PANASONIC]
Dual 15 W BTL power IC for car audio; 双15瓦BTL功率IC，适用于汽车音响
| 型号： | AN7195Z |
| 厂家： | 
PANASONIC |
| 描述： | Dual 15 W BTL power IC for car audio |
| 文件： | 总12页 (文件大小：101K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
ICs for Audio Common Use
AN7195Z
Dual 15 W BTL power IC for car audio
■ Overview
Unit : mm
The AN7195Z is an audio power IC developed for the
sound output of car audio (dual 15 W).
18.00±0.30
13.50±0.30
4.00±0.20
1.50±0.10
It is incorporating various protection circuits to pro-
tect the IC from destruction by GND-open short-circuit
to GND and power supply surge which are the most im-
portant subjects of power IC protection, and the IC will
largely contribute to a high reliability design of equip-
ment.
φ3.60±0.10
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 AN7195Z is pin compatible with the
AN7136Z (dual 20 W), so that the identical pattern design
is allowed for high-class types as well as popular types.
1
15
(0.61)
(1.80)
R0.55
(1.95)
0.25+–00..1055
0.50+–00..1200
1.27
(2.54)
19.00±0.30
19.30±0.30
HZIP015-P-0745A
■ Features
• Built-in various protection circuits (realizing high break-
down 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 ca-
pacitors,
Muting function is unnecessary
Power supply choke coil is unnecessary
• Provided with beep sound input pin
• High sound quality design
• Pin compatible with the AN7136Z (dual 20 W)
■ Applications
• Car audio
1
AN7195Z
ICs for Audio Common Use
■ Block Diagram
3
14
Ref.
Ch.1 GND
Ch.2 GND
4
13
Ch.1 Out (−)
Ch.2 Out (−)
Protection Cct.
Att.
Att.
Att.
2
15
Ch.1 Out (+)
Ch.2 Out (+)
Att.Con.
Att.
■ Pin Descriptions
Pin No.
Description
Pin No.
9
Description
Grounding (input)
Beep sound input
Ch.2 input
1
2
3
4
5
6
7
8
Power supply
Ch.1 output (+)
10
Grounding (output ch.1)
Ch.1 output (−)
Standby
11
12
Ripple filter
13
Ch.2 output (−)
Ch.1 input
14
Grounding (output ch.2)
Ch.2 output (+)
Muting
15
Grounding (sub)
■ Absolute Maximum Ratings
Parameter
Symbol
VCC
Vsurge
ICC
Rating
Unit
V
2
Supply voltage *
25
80
3
Peak supply voltage *
V
Supply current
9.0
A
Power dissipation *4
PD
32.5
W
°C
°C
1
Operating ambient temperature *
Topr
−30 to +85
−55 to +150
1
Storage temperature *
Tstg
Note) 1 : All items are at T = 25°C, except for the operating ambient temperature and storage temperature.
*
a
2 : Without signal
3 : Time = 0.2 s
*
*
*
4 : T = 85°C
a
2
ICs for Audio Common Use
AN7195Z
■ Recommended Operating Range
Parameter
Supply voltage
Symbol
VCC
Range
Unit
8.0 to 18.0
V
■ Electrical Characteristics at VCC = 13.2 V, f = 1 kHz, Ta = 25°C
Parameter
Quiescent current
Symbol
ICQ
Conditions
VIN = 0 mV, RL = 4 Ω
VIN = 0 mV, RL = 4 Ω
Rg = 4.7 kΩ, RL = 4 Ω
VIN = 20 mV, RL = 4 Ω
Min
Typ Max Unit
120
1
250
10
mA
Standby current
ISTB
µA
1
Output noise voltage *
Voltage gain 1
VNO
0.22
40
0.5 mV[rms]
GV1
38
42
dB
%
Total harmonic distortion 1
Maximum output power 1
THD1 VIN = 20 mV, RL = 4 Ω
0.07
14
0.4
PO1
RR
THD = 10%, RL = 4 Ω
12
60
W
dB
1
Ripple rejection ratio *
RL = 4 Ω, Rg = 4.7 kΩ,
Vr = 1 V[rms], fr = 1 kHz
70
Channel balance
CB
CT
VIN = 20 mV, RL = 4 Ω
0
1
dB
dB
*1
Cross-talk
VIN = 20 mV, RL = 4 Ω,
Rg = 4.7 kΩ
55
65
Output offset voltage
VOff
MT
Zi
Rg = 4.7 kΩ, RL = 4 Ω
VIN = 20 mV, RL = 4 Ω
VIN = ± 0.3 VDC
−300
70
0
82
30
40
0.1
20
0
300
mV
dB
kΩ
dB
%
1
Muting effect *
Input impedance
22
35
42
Voltage gain 2
GV2
VIN = 20 mV, RL = 2 Ω
38
Total harmonic distortion 2
Maximum output power 2
THD2 VIN = 20 mV, RL = 2 Ω
0.5
PO2
VS
THD = 10%, RL = 2 Ω
12
W
2
*
Shock noise
RL = 4 Ω, Rg = 4.7 kΩ
−100
100 mV[p-0]
VSTB = on/off, 50 Hz HPF-on
Total harmonic distortion 3
THD3 VIN = 10 mV, fIN = 20 kHz
Rg = 4.7 kΩ, RL = ∞
0.10
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
5 V
0 V
120 ms
120 ms
3
AN7195Z
ICs for Audio Common Use
■ Terminal Equivalent Circuits
Pin No.
Equivalent circuit
Description
Supply voltage pin
DC Voltage
1
13.2 V
Supply connection pin
2
Ch.1 output pin (+)
6.6 V
1
Pre-amp.
Drive circuit
Ch.1 positive-phase output pin
2
3
V
REF = 6.6 V
Drive circuit
15 kΩ
300 Ω
3
4
GND (output)
0 V
Grounding pin for ch.1 output
Ch.1 output pin (−)
6.6 V
1
Pre-amp.
Drive circuit
Ch.1 inverted-phase output pin
4
3
V
REF = 6.6 V
Drive circuit
15 kΩ
300 Ω
ꢀ
5
Standby control pin
5
10 kΩ
Standby changeover pin
Threshold voltage approx. 2.1 V
900 Ω
6
Ch.1 input pin
0 mV to10 mV
6
Approx. Approx.
15 µA 15 µA
Ch.1 input signal applied pin
Input impedance 30 kΩ
200 Ω
30 kΩ
400 Ω
4
ICs for Audio Common Use
AN7195Z
■ Terminal Equivalent Circuits (continued)
Pin No.
Equivalent circuit
Description
Mute control pin
DC Voltage
7
7
Mute changeover pin
5 kΩ
Threshold voltage approx. 2.0 V
8
9
GND (substrate)
0 V
0 V
Being connected with substrate only
GND (input)
Ground pin for input
Beep sound input pin
10
2.1 V
300 Ω
300 Ω
25 kΩ
25 kΩ
15 kΩ
VREF = 2.1 V
Beep sound signal input pin
15
Input impedance 25 kΩ
10
300 Ω
300 Ω
2
15 kΩ
VREF = 2.1 V
11
Ch.2 input pin
0 mV to10 mV
11
Approx. Approx.
15 µA 15 µA
Ch. 2 input signal applied pin
Input impedance 30 kΩ
200 Ω
30 kΩ
400 Ω
12
Ripple filter pin
13.0 V
VCC
Output current 3 mA to 10 mA
30 kΩ
12
Quick
discharge
circuit
200 µA
20 kΩ
5
AN7195Z
ICs for Audio Common Use
■ Terminal Equivalent Circuits (continued)
Pin No.
Equivalent circuit
Description
Ch.2 output pin (−)
DC Voltage
13
6.6 V
1
Pre-amp.
Drive circuit
Ch.2 inverted-phase output pin
13
15
V
REF = 6.6 V
Drive circuit
15 kΩ
300 Ω
14
15
GND(output)
0 V
Grounding pin for ch.2 output
Ch.2 Output pin (+)
6.6 V
1
Pre-amp.
Drive circuit
Ch.2 positive-phase output pin
14
15
V
REF = 6.6 V
Drive circuit
15 kΩ
300 Ω
■ 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.
8. Connect only pin 9 (ground, signal source) to the signal GND of the amplifier in the previous stage. The
characteristics such as distortion, etc. will be improved.
6
ICs for Audio Common Use
AN7195Z
■ Technical Information
[1] PD
Ta curves of HZIP015-P-0745A
PD
Ta
120
Infinity heat sink
Rth (j−c) = 1.1°C/W
Rth (j−a) = 68.3°C/W
113.6
100
80
1°C/W heat sink
2°C/W heat sink
60
59.5
40.3
40
3°C/W heat sink
5°C/W heat sink
30.5
20.5
20
10°C/W heat sink
11.3
Without heat sink
1.8
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
making pin 5 (standby terminal) high
or low.
Table 1
Terminal voltage
0 V
Terminal state
Open
Power
2) The standby terminal has threshold
voltage of approx. 2.1 V, however, it
has temperature dependency of
approx. − 6 mV/°C. The recommended
range of use is shown in table 1.
Standby state
Standby state
Operating state
Low
0 V to 1.0 V
Higher than 3 V
High
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.
VSTB−2.7 V
10 kΩ
5 V
0 V
ISTB
=
[mA]
Protection
circuit
Constant
current source
5
VSTB
10 kΩ
RF
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
AN7195Z
ICs for Audio Common Use
■ Technical Information (continued)
1
[2] Application note (continued)
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.
To speaker
2,4
13,15
2) The use of polyester film capacitor having a little fluctuation with
temperature and frequency is recommended as the 0.1 µF capacitor
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
15 µA
To power
1 µF
200 Ω
30 kΩ
400 Ω
6
11
4.7 kΩ
Input signal
Attenuator
0.01 µF
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
AN7195Z
■ Technical Information (continued)
[2] Application note (continued)
4. Ripple filter (continued)
VCC
Constant
30 kΩ
Protection
circuit
current source
12
Detection
circuit
33 µF
10 kΩ
10 kΩ
200 µA
30 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-
minal and GND, is most effective for reduc-
ing the distortion. Even in the worst case,
ground pin 8, 9 of input GND separately from
all the other GND terminals.
AN7195Z
1
3
8
9
14
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
AN7195Z
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
GV =
× 50
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
I2
Input
Output stage
Output stage
Mute/on
Mute/off
5 V
0 V
I1
I2
4.7 kΩ
10 µF
7
VMUTE
5 kΩ
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 34 dB and can not be changed by the addition of an external resistor.
10
ICs for Audio Common Use
AN7195Z
■ 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, pin 2 and pin 15 only.
300 Ω
VREF = 2.1 V
34 dB
2
47 kΩ
C1
25 kΩ
25 kΩ
10
Beep input
0.022 µF R1
15
ꢀꢀ ꢀ 150 ꢀꢀꢀ
GV =
ꢀꢀ
× 50
300 Ω
25 k+300
1/jωC1+R1+
34 dB
VREF = 2.1 V
2
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
2 200 µF
0.1 µF 0.1 µF
2.2 Ω 2.2 Ω
Standby
2.2 kΩ
Mute
Out(FR)
22 µF
0.1 µF 0.1 µF
2.2 Ω 2.2 Ω
47 µF
4.7 kΩ
In(RR)
1 µF
Out(RL)
In(FR)
4.7 kΩ
1 µF
1 µF
1 µF
In(RL)
In(FL)
0.1 µF 0.1 µF
2.2 Ω 2.2 Ω
S-GND
In(FL)
0.022 µF
Out(FL)
47 kΩ
0.1 µF 0.1 µF
2.2 Ω 2.2 Ω
4.7 kΩ
Figure 8
11
AN7195Z
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
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.
■ Application Circuit Example
3
4
14
13
Ch.1 GND
Ch.2 GND
Ch.1 Out (−)
Ch.2 Out (−)
Ch.1 Out (+)
Ch.2 Out (+)
2
15
12
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