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): 20/41頁
文件大小: 5959K
代理商: AN12941A
AN
12941
A
20
SDC
00056
AEB
Application Notes (continued)
3
. Main signal on/off change and alarm signal mix circuit block
Main signal on/off circuit
1
) The speaker amplifier section is set to Mute when main signal is off.
2
) High: Signal on , Low: Signal off
Main signal level adjustment
1
) The gain of this inverting amplifier can be reduced by adding external resistance in parallel between pin
12
and pin
13
or pin
44
and pin
45
.
When addition resistance is set to Rd (k
)
18
×
(
9
+ Rd)
12
.
7
×
(
18
+
9
+ Rd)
Gd =
12.7 k
18 k
9 k
9 k
18 k
12.7 k
V
CC
Rd
Rd
+
9 dB
+
3 dB
+
9 dB
+
3 dB
3 dB
3 dB
AGC
AGC
Headphone
V
REF
V
REF
Headphone
Mute
9
10
11
8
12
13
14
48
8
47
46
45
44
43
7
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