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參數(shù)資料
| 型號： | TS4998IQT |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 1 W, 2 CHANNEL, AUDIO AMPLIFIER, QCC16 |
| 封裝： | 4 X 4 MM, ROHS COMPLIANT, QFN-16 |
| 文件頁數(shù)： | 20/33頁 |
| 文件大?。?/td> | 488K |
| 代理商： | TS4998IQT |
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TS4998
Application information
27/33
external input capacitors CIN, some noise might remain at startup. To eliminate the effect of
mismatched components, the TS4998 includes pop reduction circuitry. With this circuitry,
the TS4998 is close to zero pop for all possible common applications.
In addition, when the TS4998 is in standby mode, due to the high impedance output stage in
this configuration, no pop is heard.
4.12
Single-ended input configuration
It is possible to use the TS4998 in a single-ended input configuration. However, input
coupling capacitors are needed in this configuration. The schematic diagram in Figure 67
shows an example of this configuration for a gain of +6dB set by the input resistors.
Figure 67.
Typical single-ended input application
The component calculations remain the same for the gain. In single-ended input
configuration, the formula is:
with RIN expressed in kΩ.
Cin1
330nF
Cb
1uF
Cs
1uF
Cin2
330nF
Cin3
330nF
Cin4
330nF
VCC
Left Speaker
8 Ohms
Right Speaker
8 Ohms
ST
BYL
C
o
n
tr
o
l
ST
BYR
C
ont
ro
l
P1
Diff. input L-
P2
Diff. input R-
Rin1
25k
Rin2
25k
Rin3
25k
Rin4
25k
1
2
4
3
13
5
6
14
12
11
9
10
8
7
BIAS
STBY
LEFT
RIGHT
LIN-
RIN-
LIN+
RIN+
Bypass
GND
LOUT-
LOUT+
ROUT-
ROUT+
-
+
-
ST
B
Y
L
ST
B
Y
R
Vcc
TS4998
U1
TS4998 - QFN16
Av
SE =
V
O+
V
O-
–
V
e
--------------------------
R
feed
R
IN
--------------
50k
Ω
R
IN
--------------
==
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