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4.3
TPA3251 EVM Schematics
Figure 28
through
J3
1
INA-RCA
RCA INPUT
R9
2
INA/AB
3
100k
INPUT SE A
LEFT+
SE AB
DIFF A+
AGND1
J10
J14
1
INB-RCA
RCA INPUT
R43
2
INB
3
100k
INPUT SE B
LEFT-
DIFF A-
AGND1
SPKB-OUT
R53
RESET
RESET-SW
1.00k
RST-AIB
FROM DUT
CLIP_OTW
FAULT
SPKD-OUT
J18
INC-RCA
1
RCA INPUT
2
INC/CD
R45
3
100k
INPUT SE C
RIGHT+
SE CD
DIFF C+
J12
AGND2
J15
IND-RCA
1
RCA INPUT
2
R48
IND
3
100k
INPUT SE D
RIGHT-
DIFF C-
AGND2
SLAU751 – November 2017
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Figure 30
illustrate the TPA3251EVM schematics.
C20
R7
C18
22pF
10.0k
10µF
R8
10.0k
+12V-OA
1
2
3
2
U5A
ROUTED
<-
1
GROUND
AGND1
VMID
3
NE5532ADR
1
C71
GND
2
3
10µF
J28
2
1
SPKA-OUT
PVDD
4
3
R67
0
DNP
3.3V
6
5
DNP
3.3V
8
7
+12V
10
9
12
11
INA-AIB
AUDIO
14
13
INB-AIB
16
15
INC-AIB
INTERFACE
IND-AIB
18
17
20
19
BOARD
R46
10.0k
22
21
24
23
26
25
SPKC-OUT
GND
28
27
GND
GND
C62
R20
C57
22pF
10.0k
10µF
R21
10.0k
+12V-OA
1
U6A
2
2
3
1
VMID
3
AGND2
NE5532ADR
1
GND
C66
2
3
10µF
Figure 28. TPA3251EVM Schematic 1
Copyright © 2017, Texas Instruments Incorporated
J34 INA-SEL
IN-A_RCA
C23
22pF
R41
10.0k
R42
6
U5B
7
IN-B_RCA
10.0k
VMID
5
NE5532ADR
J4
SE
DIFF
IN A/B
INA-AIB
INB-AIB
AIB
ALIGNMENT
HEADER
J30
GND
INC-AIB
IN-C_RCA
C65
J19
22pF
IND-AIB
SE
R25
DIFF
10.0k
IN C/D
R27
6
U6B
7
IN-D_RCA
10.0k
VMID
5
NE5532ADR
EVM Design Documents
C17
R52
0
R4
0
INA-SEL
10µF
C26
R47
DNP
220pF
DNP
18.0k
DNP
DNP
R11
2.00k
C73
22pF
DNP
DNP
DNP
DNP
J35 INB-SEL
GND
R14
2.00k
C74
22pF
DNP
DNP
DNP
DNP
C37
R49
GND
DNP
220pF
DNP
18.0k
DNP
DNP
C28
R59
0
R12
0
INB-SEL
10µF
SPKB-OUT
R63
0
DNP
DNP
SPKA-OUT
R64
0
DNP
DNP
NT1
Net-Tie
AGND1
NT2
Net-Tie
AGND2
GND
SPKC-OUT
R65
0
DNP
DNP
SPKD-OUT
R66
0
DNP
DNP
J26 INC-SEL
C55
R60
0
R36
0
INC-SEL
C45
10µF
R50
DNP
220pF
DNP
18.0k
DNP
DNP
R18
2.00k
C75
22pF
DNP
DNP
DNP
DNP
GND
J27 IND-SEL
R22
2.00k
C76
DNP
DNP
DNP
DNP
22pF
C61
R51
GND
DNP
220pF
DNP
18.0k
DNP
DNP
C63
R62
0
R44
0
IND-SEL
10µF
Copyright © 2017, Texas Instruments Incorporated
TPA3251 Evaluation Module
To DUT
INA
OUTA
From DUT
OUTB
To DUT
INB
PBTL
SELECT
J7
1
2
INC
GND
J8
1
2
IND
GND
To DUT
INC
OUTC
From DUT
OUTD
To DUT
IND
17
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