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參數(shù)資料
| 型號： | AN7191NZ |
| 廠商： | PANASONIC CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | Dual 20 W BTL audio power amplifier |
| 中文描述： | 24 W, 2 CHANNEL, AUDIO AMPLIFIER, PZFM15 |
| 封裝： | ZFM-15 |
| 文件頁數(shù)： | 14/16頁 |
| 文件大?。?/td> | 146K |
| 代理商： | AN7191NZ |
14
AN7191NZ
ICs for Audio Common Use
I
Technical Information (continued)
[2] Application note (continued)
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
μ
F between the standby terminal and GND.
2) Mute on/off
No shock noise is released. Refer to the section on the mute function.
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 :
G
V
=
I
1
×
50
I
2
Original gain
From the above equation, the amplifier gain can be made as 0 time by setting I
1
at 0 mA in muting.
3) The threshold voltage of V
MUTE
is as follows :
Mute-off : Approx. 1 V or less
Mute-on : Approx. 3 V or less
4) Attack time and recovery time can be changed by the external CR of pin 7. For recommended circuits (figure
7. 4.7k
, 10
μ
F), the above mentioned times are as follows :
Attack time
: Approx. 30 ms
Recovery time : Approx. 40 ms
However, the control voltage of V
MUTE
is assumed to be 5 V. When it is not directly controlled by
microcomputer (5 V), (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.
5 k
7
4.7 k
5 V
0 V
10
μ
F
I
2
I
1
2
I
1
I
1
=
approx. 120
μ
A
I
2
=
approx. 120
μ
A
Output stage
Input
Output stage
Attenuator block
V
MUTE
Mute/Off
Mute/On
g
Figure 6
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| AN7194 | 制造商:PANASONIC 制造商全稱:Panasonic Semiconductor 功能描述:Dual BTL 50 W single power supply class-H power amplifier IC |
| AN7194K | 制造商:PANASONIC 制造商全稱:Panasonic Semiconductor 功能描述:Dual BTL 50 W single power supply class-H power amplifier IC |
| AN7194Z | 制造商:PANASONIC 制造商全稱:Panasonic Semiconductor 功能描述:Dual BTL 50 W single power supply class-H power amplifier IC |
| AN7195 | 制造商:PANASONIC 制造商全稱:Panasonic Semiconductor 功能描述:Dual 15 W BTL power IC for car audio |
| AN7195K | 制造商:PANASONIC 制造商全稱:Panasonic Semiconductor 功能描述:Dual 15 W BTL power IC for car audio |
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