參數(shù)資料
型號: TPA0223DGQR
廠商: TEXAS INSTRUMENTS INC
元件分類: 音頻/視頻放大
英文描述: 2 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO10
封裝: GREEN, PLASTIC, MSOP-10
文件頁數(shù): 11/26頁
文件大?。?/td> 716K
代理商: TPA0223DGQR
TPA0223
2-W MONO AUDIO POWER AMPLIFIER
WITH HEADPHONE DRIVE
SLOS277C – JANUARY 2000 – REVISED NOVEMBER 2002
19
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
ST/MN (stereo/mono) operation (continued)
Left
Audio
Input
Right
Audio
Input
4
MONO-IN
+
1.25*R
R
+
50 k
M
U
X
1
RIN
5
RI
Ci
Mono
Audio
Input
RI
Ci
RO/MO+
6
+
1.25*R
R
+
50 k
M
U
X
LIN
9
RI
Ci
10
50 k
Stereo/Mono
Control
Shutdown
and Depop
Circuitry
SHUTDOWN
2
From
System Control
ST/MN
7
LO/MO–
CC
100 k
100 k
VDD
1 k
CB
BYPASS
8
BYPASS
VDD
3
VDD
GND
1 k
50 k
50 k
Figure 25. TPA0223 Resistor Divider Network Circuit
Using a readily available 1/8-in. (3,5 mm) stereo headphone jack, the control switch is closed when no plug is
inserted. When closed, the 100-k
/1-k divider pulls the ST/MN input low. When a plug is inserted, the 1-k
resistor is disconnected and the ST/MN input is pulled high. The mono speaker is also physically disconnected
from the RO/MO+ output so that no sound is heard from the speaker while the headphones are inserted.
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