Texas Instruments TPA3120D2, Руководство пользователя, Страница: 4 / 9

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2.1.3 Power Up
3 TPA3120D2 EVM Schematic
RIGHT_OUT
LEFT_IN
RIGHT_IN
LEFT_OUT
VCC
VCC
VCC
VCC
VCC
VCC
C9 open
C16 open
Circuit inside dotted line is
for power down de-pop
improvement.
R
3
1
0
K
R
3
1
0
K
J4
-LOUT
J4
-LOUT
TP4 TP4
SW1
SHUTDOWN
SW1
SHUTDOWN
U1
TPA3120
U1
TPA3120
PVCCL
1
SD
2
PVCCL
3
MUTE
4
LIN
5
RIN
6
BYPASS
7
AGND
8
AGND
9
PVCCR
10
VCLAMP
11
PVCCR
12
PGNDR
13
PGNDR
14
ROUT
15
BSR
16
GAIN1
17
GAIN0
18
AVCC
19
AVCC
20
BSL
21
LOUT
22
PGNDL
23
PGNDL
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
5
K
R6
4
.7
5
K
L2
22uH
L2
22uH
J7
VCC
J7
VCC
R12
10K
R12
10K
C
6
1
.0
u
F
C
6
1
.0
u
F
R9
0
R9
0
D2
Dl4148
R
4
1
0
K
R
4
1
0
K
C18
0.01uF
C18
0.01uF
R
1
7
o
p
e
n
1
0
R
1
7
o
p
e
n
1
0
TP12
RGND
TP12
RGND
SW2
MUTE
SW2
MUTE
TP3 TP3
C12 0.22uF C12 0.22uF C9
1
.0
u
F
C9
1
.0
u
F
R16
20K
R16
20K
R7
4
.7
5
K
R7
4
.7
5
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
R8
4.75K
R8
4.75K
J9
LIN
J9
LIN
2
3
1
R18
10K
R18
10K
+
C10
470uF
+
C10
470uF
1 2
J11 J11
1
2
TP10
GND
TP10
GND
C16
1
.0
u
F
C16
1
.0
u
F
R1
10K
R1
10K
C15 0.22uF C15 0.22uF
R
1
3
1
5
0
K
R
1
3
1
5
0
K
TP7
R
IG
H
T
_
O
U
T
TP7
R
IG
H
T
_
O
U
T
J5
-ROUT
J5
-ROUT
J1
GAIN0
J1
GAIN0
1
2
+
C17
470uF
+
C17
470uF
1 2
C3
1.0uF
C3
1.0uF
R15 open
1M
R15 open
1M
J3
+LOUT
J3
+LOUT
TP11
LGND
TP11
LGND
TP1
L
E
F
T
_
IN
TP1
L
E
F
T
_
IN
C19
0
.6
8
u
F
C19
0
.6
8
u
F
R
2
1
0
K
R
2
1
0
K
C
E
B Q4
MMBT3904
C
E
B Q4
MMBT3904
1
2
3
+
C2
4
7
0
u
F
+
C2
4
7
0
u
F
1
2
J6
+ROUT
J6
+ROUT
R10
0
R10
0
C11 open
10pF
C11 open
10pF
10pF
C21 open
10pF
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
.6
8
u
F
C20
0
.6
8
u
F
TP6
L
E
F
T
_
O
U
T
TP6
L
E
F
T
_
O
U
T
R11
2.49K
R11
2.49K
10K
R19
10K
D1
TLV431ACDBZR D1
TLV431ACDBZR
3
2
1
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
22uH
L1
22uH
C
5
1
.0
u
F
C
5
1
.0
u
F
TPA3120D2 EVM Schematic
1. Verify correct voltage and input polarity, and turn the external power supplies ON.
The EVM should begin operation.
1. Adjust the input signal.
2. Adjust the control inputs to the desired settings.
3. Adjust the amplifier gain by installing/removing the gain jumpers, J1 and J2.
Figure 2. TPA3120D2 EVM Schematic
TPA3120D2 Audio Power Amplifier EVM 4 SLOU189A – March 2007 – Revised April 2007
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