TPA0132_15 Datasheet, PDF (15/30 Pages) Texas Instruments – 2.8-W STEREO AUDIO POWER AMPLIFIER WITH DC VOLUME CONTROL

TPA0132
www.ti.com
SLOS223E – MAY 1999 – REVISED SEPTEMBER 2004
APPLICATION INFORMATION
COMPONENT SELECTION
Figure 30 and Figure 31 are schematic diagrams of typical notebook computer application circuits.
Right CIRHP
Head- 0.47 µF
phone
Input
Signal
20
RHPIN
C_IRLINE ^{23 RLINEIN}
Right 0.47 µF
Line
Input
Signal
R
MUX
C_RIN
0.47 µF
8 RIN
32-Step
Volume
Control
PC-BEEP
Input
14
Signal _CPCB
0.47 µF
V_DD
PC-BEEP
PC-
Beep
50 kΩ
C_CLK
47 nF
3 VOLUME
17 CLK
15 SE/BTL
Gain/
MUX
Control
32-Step
Volume
Control
Depop
Circuitry
Left ^CILHP
Head- ^{0.47 µF}
phone
6 LHPIN
Input
Signal
C_ILLINE
5 LLINEIN
Left 0.47 µF
Line
Input
Signal
L
MUX
32-Step
Volume
Control
-
ROUT+ 21
+
-
ROUT- 16
+
V_DD
100 kΩ
PV_DD
Power
Management
V_DD
BYPASS
SHUT-
DOWN
GND
-
LOUT+
+
18 ^{See Note A}
C_SR^VDD
0.1 µF
19
V_DD
11
C_SR
0.1 µF
22
To
System
Control
C_BYP
0.47 µF
1, 12,
4 ^{13, 24}
C_LIN
0.47 µF
10 LIN
32-Step
Volume
Control
-
LOUT- 9
+
C_OUTR
330 µF
1 kΩ
1 kΩ
C_OUTL
330 µF
100 kΩ
NOTE: A 0.1-µF ceramic capacitor should be placed as close as possible to the IC. For filtering lower-frequency noise
signals, a larger electrolytic capacitor of 10 µF or greater should be placed near the audio power amplifier.
Figure 30. Typical TPA0132 Application Circuit Using Single-Ended Inputs and Input MUX
15