Datasheet

TPA0211
2-W MONO AUDIO POWER AMPLIFIER
SLOS275D – JANUARY 2000 – REVISED NOVEMBER 2002
20
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
APPLICATION INFORMATION
ST/BTL
operation (continued)
4
+
–
1.25*R
R
+
–
50 kΩ
1
R
I
C
i
Audio
Input
V
O+
5
+
–
1.25*R
R
+
–
50 kΩ
8
50 kΩ
SE/BTL
Control
Shutdown
and Depop Circuitry
SHUTDOWN
2
From
System Control
SE/BTL
6
V
O–
C
C
100 kΩ
100 kΩ
V
DD
1 kΩ
C
B
BYPASS
7
BYPASS
BYPASS
BYPASS
BYPASS
BYPASS
V
DD
3
V
DD
GND
IN
Figure 25. TPA0211 Resistor Divider Network Circuit
Using a readily available 1/8-in. (3,5 mm) mono headphone jack, the control switch is closed when no plug is
inserted. When closed, the 100-kΩ/1-kΩ divider pulls the SE/BTL input low. When a plug is inserted, the 1-kΩ
resistor is disconnected and the SE/BTL
input is pulled high.