Texas Instruments TPA3121D2, User Manual

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2.1.3 Power Up
3 Reference
3.1 TPA3121D2 EVM Schematic
RIGHT_OUT
LEFT_IN
RIGHT_IN
LEFT_OUT
VCC
VCC
VCC
VCC
VCC
C9 DNI
C16 DNI
R
3
1
0
K
R
3
1
0
K
J4
GND
J4
GND
TP4 TP4
SW1
SHUTDOWN
SW1
SHUTDOWN
U1
TPA3121D2
U1
TPA3121D2
PVCCL1
1
SDZ
2
PVCCL2
3
MUTE
4
LIN
5
RIN
6
BYP
7
GND1
8
GND2
9
PVCCR1
10
VCLAMP
11
PVCCR2
12
PVSSR2
13
PVSSR1
14
OUTR
15
BSR
16
GAIN1
17
GAIN0
18
AVCC2
19
AVCC1
20
BSL
21
OUTL
22
PVSSL2
23
PVSSL1
24
T
H
E
R
M
A
L
2
5
C
1
4
0
.1
u
F
C
1
4
0
.1
u
F
TP5 TP5
R6
4
.7
K
R6
4
.7
K
L2
33uH
L2
33uH
J7
VCC
J7
VCC
C
6
1
.0
u
F
C
6
1
.0
u
F
R9
0
R9
0
R
4
1
0
K
R
4
1
0
K
TP12
RGND
TP12
RGND
SW2
MUTE
SW2
MUTE
TP3 TP3
C12 0.22uF C12 0.22uF C9
0
.2
2
u
F
C9
0
.2
2
u
F
R7
4
.7
K
R7
4
.7
K
+
C8
4
7
0
u
F
+
C8
4
7
0
u
F
1
2
J8
GND
J8
GND
TP2 TP2
J10
RIN
J10
RIN
2
3
1
J9
LIN
J9
LIN
2
3
1
+
C10
470uF
+
C10
470uF
1 2
TP10
GND
TP10
GND
C16
0
.2
2
u
F
C16
0
.2
2
u
F
R1
10K
R1
10K
C15 0.22uF C15 0.22uF
TP7
R
IG
H
T
_
O
U
T
TP7
R
IG
H
T
_
O
U
T
J5
GND
J5
GND
J1
GAIN0
J1
GAIN0
1
2
+
C17
470uF
+
C17
470uF
1 2
C3
1.0uF
C3
1.0uF
J3
+LOUT
J3
+LOUT
TP11
LGND
TP11
LGND
TP1
L
E
F
T
_
IN
TP1
L
E
F
T
_
IN
C19
0
.2
2
u
F
C19
0
.2
2
u
F
R
2
1
0
K
R
2
1
0
K
+
C2
4
7
0
u
F
+
C2
4
7
0
u
F
1
2
J6
+ROUT
J6
+ROUT
R10
0
R10
0
C
1
3
1
0
u
F
C
1
3
1
0
u
F
C4
1.0uF
C4
1.0uF
J2
GAIN1
J2
GAIN1
1
2
C7 0.1uF C7 0.1uF
C20
0
.2
2
u
F
C20
0
.2
2
u
F
TP6
L
E
F
T
_
O
U
T
TP6
L
E
F
T
_
O
U
T
C1 0.1uF C1 0.1uF
TP9
INPUT_GND
TP9
INPUT_GND
TP8
R
IG
H
T
_
IN
TP8
R
IG
H
T
_
IN
L1
33uH
L1
33uH
C
5
1
.0
u
F
C
5
1
.0
u
F
Reference
www.ti.com
1. Verify correct voltage and input polarity and turn the external power supplies ON.
The EVM should begin operation
2. Adjust the input signal.
3. Adjust the control inputs to the desired settings.
4. Adjust the amplifier gain by installing/removing the gain jumpers,
J1 and J2 .
Figure 3. TPA3121D2 EVM Schematic
TPA3121D2 Audio Power Amplifier Evaluation Module 4 SLOU221 – June 2008
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