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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)： | 19/41頁 |
| 文件大?。?/td> | 5959K |
| 代理商： | AN12941A |
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AN
12941
A
SDC
00056
AEB
19
■
Application Notes (continued)
2
. Signal detection system mix circuit block (continued)
Detection sensitivity threshold values vs. external resistance
70
60
50
40
1
10
100
1
000
Detection threshold value (L-channel)
Detection threshold value vs. resistance constant (L-channel) between pin 50 and pin 51
D
Resistance constant (between pin 50 and pin 51) (k
)
Power save of speaker power amplifier
1
) When input signal level is lower than a certain value due to signal automatic detection circuit, power save
of speaker power amp will be operated.
2
) This automatic detecting function is able to stopped by pin
17
.
3
) When the automatic detection is off, it control manual control by pin
35
.
4
) Also when the automatic detection is on, manual power save on is prioritized.
When it control only the automatic detecting function, set pin
35
to power save off.
Signal detecting distinction output
1
) The result of automatic signal detection is output from pin
22
.
47 k
22
0.047
μ
F
Signal
detection
V
CC
V
CC
V
CC
Automatic signal detection function
on/off
Automatic signal detection
monitor pin
Power save
on/off
Power save of
speaker power
amplifier
51
50
39
38
21
17
35
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