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參數(shù)資料
| 型號： | AN12941A |
| 廠商： | PANASONIC CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | The AN12941A is an amplifier IC for stereo speakers which can output 1 W by 8 Ohm or 2 W by 4 Ohm |
| 中文描述： | 2 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO56 |
| 封裝： | 0.300 INCH, LEAD FREE, PLASTIC, HSOP-56 |
| 文件頁數(shù)： | 17/41頁 |
| 文件大?。?/td> | 5959K |
| 代理商： | AN12941A |
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AN
12941
A
SDC
00056
AEB
17
■
Application Notes
Circuit Descriptions
1
. Input inverting amplifier and signal mix circuit block
Input inverting amplifier block
1
) The input impedance of each input pin is about
50
k
.
2
) Each input impedance is
±
10
% of variation exists by diffusion variation.
3
) The gain of the input part is able to lowered by adding resistance to input pin in series.
When addition resistance is set to Ra (k
)
Ga =
25
.
2
50
+ Ra
Signal mix circuit block
1
) It is added (mix) in the inverting amplifier method.
Mix ratio is
1
to
1
for each input.
2
) Connect volume to this mix amplifier output, allowing you to vary the next stage input level.
3
) Pin
8
is the V
REF
output pin for volume reference.
25.2 k
25.2 k
25.2 k
25.2 k
25.2 k
25.2 k
25.2 k
25.2 k
25.2 k
25.2 k
Mix
Mix
Mix
Mix
Mix
Mix
R-channel
L-channel
0 dB
0 dB
V
REF
V
REF
It becomes the volume for sound
control by external resistance change.
Gain is 0 dB at maximumvolume.
It adds to the main audio signals
in inverting amplifier form.
Mix ratio is 1 to 1.
· Signal from PCcard
· Beep signal
· Signal from modem
Vol.out
audio signal
46
External
volume
External
volume
Vol.out
audio signal
Audio signal
L-channel input
Audio signal
R-channel input
Modem signal input
Beep input
PCcard input
52
4
56
8
6
9
48
8
47
10
11
0dB
0dB
54
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PDF描述 |
|---|---|
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AN12942B | 制造商:PANASONIC 制造商全稱:Panasonic Semiconductor 功能描述:Audio signal processing IC for notebook PC |
| AN12943A | 制造商:PANASONIC 制造商全稱:Panasonic Semiconductor 功能描述:Audio signal processing IC for notebook PC |
| AN12948A | 制造商:PANASONIC 制造商全稱:Panasonic Semiconductor 功能描述:Audio Power IC for Note PC |
| AN12959A | 制造商:PANASONIC 制造商全稱:Panasonic Semiconductor 功能描述:I2C bus control compatible AGC built-in stereo BTL amplifier IC |
| AN12969A | 制造商:PANASONIC 制造商全稱:Panasonic Semiconductor 功能描述:I2C bus control compatible AGC built-in stereo BTL amplifier IC |
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