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TDA1904 데이터시트(Datasheet) 5 Page - STMicroelectronics

부품명 TDA1904
상세내용  4WAUDIO AMPLIFIER
PDF  10 Pages
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제조사  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
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APPLICATION SUGGESTION
The recommended values of the external compo-
nents are those shown on the application circuit of
fig. 1.
When the supply voltage VS is less than 6V, a 68
resistor must be connected between pin 2 and pin
Components
Recomm.
value
Purpose
Larger than
recommended value
Smaller than
recommended value
Allowed range
Min.
Max.
R1
10 K
Feedback resistors
Increase of gain.
Decrease of gain.
Increase quiescent
current.
9R3
R2
100
Decrease of gain.
Increase of gain.
1K
R3
4.7
Frequency stability
Danger of oscillation at
high frequencies with
inductive loads.
R4
68
Increase of the
output swing with
low supply voltage.
39
220
C1
2.2
µF
Input DC
decoupling.
Higher cost lower
noise.
Higher low
frequency cutoff.
Higher noise.
C2
0.1
µF
Supply voltage
bypass.
Danger of
oscillations.
C3
22
µF
Ripple rejection
Increase of SVR
increase of the
switch-on time.
Degradation of SVR.
2.2
µF 100ΩF
C4
2.2
µF
Inverting input DC
decoupling.
Increase of the
switch-on noise
Higher low
frequency cutoff.
0.1
ΩF
C5
47
µF
Bootstrap.
Increase of the
distortion at low
frequency.
10
µF
100
µF
C6
0.22
µF
Frequency stability.
Danger of oscillation.
C7
1000
µF
Output DC
decoupling
Higher low
frequency cutoff.
3 in order to obtain the maximum output power.
Different values can be used. The following table
can help the designer.
5/10
TDA1904




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