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參數(shù)資料
| 型號： | AN5278 |
| 廠商： | PANASONIC CORP |
| 元件分類： | 音頻控制 |
| 英文描述： | 4.8 W X 1 (18 V, 8 ohm) Power Amplifier with Volume and Tone Control |
| 中文描述： | 1 CHANNEL(S), TONE CONTROL CIRCUIT, PSFM9 |
| 封裝： | HSIP-9 |
| 文件頁數(shù)： | 6/9頁 |
| 文件大?。?/td> | 77K |
| 代理商： | AN5278 |
6
AN5278
ICs for Audio Common Use
I
Technical Information (continued)
2.Application Note
1) Gain setting and frequency response
The gain is fixed to be 30 dB by internal resistors. The frequency response is flat for the values of R1
=
6.2 k
, and
C2
=
0.01
μ
F, between pins 1 and 2 (other conditions : tone control voltage is set at 2.5 V, and volume control voltage
is set at 5 V).
The gain can be reduced by inserting a resistor Rf in series with the electrolytic capacitor at Pin6.
Voltage gain
=
20 log [10 k
/(Rf
+
300
)]
Bass boost can be easily implemented by inserting a series connection of RC between Pin8 (output) and Pin6 (NF).
Example : Rb
=
12 k
, Cb
=
0.022
μ
F
I
L
C2
0.01
μ
F
10
μ
F
Frequency
30 dB
V
IN
Gain
6.2 k
R1
N
O
R
L
=
8
Rf
10 k
Cb
Rb
300
N
O
R
L
=
8
Rf
10
μ
F
10 k
300
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