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參數(shù)資料
| 型號： | TDA1908 |
| 廠商： | 意法半導(dǎo)體 |
| 元件分類： | 運動控制電子 |
| 英文描述： | 8W AUDIO AMPLIFIER |
| 中文描述： | 8瓦特音頻放大器 |
| 文件頁數(shù)： | 9/12頁 |
| 文件大小： | 208K |
| 代理商： | TDA1908 |
Component
Raccom.
value
Purpose
Larger than
raccomanded value
Smaller than
raccomanded value
Allowed range
Min.
Max.
R
1
10 K
Close loop gain
setting
Increase of gain.
Decrease of gain.
Increase quiescent
current.
9 R
2
R
2
100
Close loop gain
setting.
Decrease of gain.
Increase ofgain.
R
1
/9
R
3
1
Frequency stability
Danger of oscillation at
hight frequencies with
inductiveloads.
R
4
100
Increaseing of output
swing with low Vs.
47
330
C
1
2.2
μ
F
Input DC
decoupling.
Lower noise.
Higher low
frequency cutoff.
Higher noise.
0.1
μ
F
C
2
0,1
μ
F
Supply voltage
bypass.
Danger of
oscillations.
C
3
2.2
μ
F
Inverting input DC
decoupling.
Increase of the
switch-on noise
Higher low
frequency cutoff.
0.1
μ
F
C
4
10
μ
F
Ripple Rejection.
Increase of SVR.
Increase of the
switch-on time.
Degradation of
SVR.
2.2
μ
F 100
μ
F
C
5
47
μ
F
Bootstrap
Increase ofthe
distorsion at low
frequency
10 mF
100
μ
F
C
6
0.22
μ
F
Frequency stability.
Danger of oscillation.
C
7
1000
μ
F
Output DC
decoupling.
Higher low
frequency cutoff.
APPLICATION SUGGESTION
The recommended valuesof theexternal componentsarethoseshown onthe applicationcircuit offig.19.
When the supplyvoltage Vs is lessthan 10V, a 100
resistor mustbe connectedbetween pin1 and pin4
in order to obtainthe maximum output power.
Different values can be used. The following table can help the designer.
9/12
TDA1908
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