TPA0312_16 Datasheet, PDF (18/37 Pages) Texas Instruments – 2.6-W STEREO AUDIO POWER AMPLIFIER WITH FOUR SELECTABLE GAIN SETTINGS AND MUX CONTROL

TPA0312
SLOS335A – DECEMBER 2000 – REVISED OCTOBER 2004
APPLICATION INFORMATION (continued)
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C_IRHP−
0.47 µF
Right
Negative
Differential
Input Signal
20
C_IRIN−
0.47 µF
23
RHPIN
RLINEIN
R
MUX
C_IRIN+
Right ^{0.47 µF}
Positive
8 RIN
Differential
Input Signal
Volume
Control
Volume
Control
PC-BEEP
Input
Signal
14
C_PCB
0.47 µF
PC-BEEP
PC-
Beep
GAIN0
2, 3 GAIN1
17 HP/LINE
15 SE/BTL
Gain/
MUX
Control
Depop
Circuitry
C_ILHP
0.47 µF
6 LHPIN
Left
Negative
5 LLINEIN
Differential
Input Signal
C_ILIN−
0.47 µF
L
MUX
Volume
Control
−
ROUT+ 21
+
−
ROUT− 16
V_DD
+
100 kΩ
Power
Management
−
+
PV_DD
V_DD
BYPASS
SHUT−
DOWN
GND
LOUT+
18 ^{See Note A}
C_SR^VDD
0.1 µF
19
V_DD
11
22
To
System
Control
C_SR
0.1 µF
C_BYP
0.47 µF
1, 12,
4 ^{13, 24}
C_OUTR
330 µF
1 kΩ
1 kΩ
C_OUTL
330 µF
Left
Positive
10 LIN
Differential
Input Signal
C_ILIN
0.47 µF
Volume
Control
9
−
LOUT−
+
100 kΩ
A. 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 38. Typical TPA0312 Application Circuit Using Differential Inputs
18