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EVM Design Documents
MODE PIN SELECTION
M2
M1
INPUT MODE
OUTPUT
DESCRIPTION
0
0
2N + 1
2xBTL
STEREO BTL OUTPUT, A D MODE
0
1
2N/1N + 1
1xBTL + 2xSE
2.1 BTL + SE MODE, AD MODE
1
0
2N + 1
1xPBTL
PARALLEL BTL OUTPUT, A D MODE
1
1
1N + 1
4xSE
SINGLE ENDED OUTPUT, A D MODE
R5
INPUT_A
INA
100
C19
100pF
GND
R10
INPUT_B
INB
100
C30
FROM
100pF
ANALOG
FRONT END
GND
R19
INPUT_C
INC
100
C58
100pF
GND
R23
INPUT_D
IND
100
C64
100pF
GND
S1
6
5
4
3
1
RESET
GND
GND
PVDD
J1
C39
C3
C11
47µF
1µF
0.01µF
50V
50V
50V
RANGE 18V-36V
GND
+15V
U2
1
IN
OUT
4
TAB
GND
C6
C8
4.7µF
0.47µF
LM2940IMP-12/NOPB
GND
GND
GND
+12V
U3
3.3V-VR
3
2
IN
OUTPUT
4
OUTPUT
C38
10µF
1
GND
TLV1117-33IDCY
GND
GND
+12V
L6
10uH
0.8A
C81
C16
10µF
10µF
GND
GND
GND
18
TPA3251 Evaluation Module
+12V GVDD
GVDD
PVDD
TP4
R3
GVDD_AB
0
C31
C14
2200µF
0.1uF
J36
+12V
GND
GND
GND
GVDD
PVDD
TP8
R6
VDD
3.3
C46
C22
2200µF
0.1uF
GND
GND
GND
GVDD-AB
DNP
GVDD
TP15
VDD
DNP
R1
GVDD_CD
TP16
GVDD-CD
0
DNP
TP17
C69
0.1uF
C40
C41
GND
INA
DNP
TP20
GND
INB
DNP
TP21
INC
DNP
TP22
IND
DNP
TP23
3.3V
M1
DNP
TP25
1
M1
2
J5
3
RESET
GND
3.3V
IN = SE
C_START
1
J21
2
OUT = BTL
1
M2
2
J6
C50
C49
3
0.47µF
0.01µF
GND
J17
GND
GND
OC_IOP
4
MODE
OSCILLATOR
3
SELECTION
SYNC
2
OC_IOM
INTERFACE
1
GND
3.3V
J16
2
1
SLAVE MODE
R15
10.0k
4
3
MASTER MODE
6
5
MASTER MODE AM1
R16
20.0k
8
7
MASTER MODE AM2
R17
30.0k
FREQUENCY
ADJUST
GND
PVDD
GVDD
R61
100k
R32
C82
8.87k
0.1uF
U7
C83
1µF
VDD-RST
RESET
4
3
VDD
RESET
GND
1
GND
C84
R26
5
2
MR
GND
1µF
3.30k
C67
0.1uF
TPS3802K33DCKR
GND
GND
GND
GND
RESET-SW
Figure 29. TPA3251EVM Schematic 2
PVDD
C4
C2
2.2µF
0.1µF
50V
50V
J29
PVDD-IN
GND
GND
+12V
12V-VR
3
2
C5
C9
47µF
0.1uF
GND
J32
12V
GND
GND
3.3V
C10
100µF
J33
3.3V
GND
+12V-OA
+12V-OA
R37
10.0k
C53
R38
C15
C51
10µF
10.0k
0.1uF
0.1uF
NT3
Net-Tie
GND
GND
GND
Figure 30. TPA3251EVM Schematic 3
Copyright © 2017, Texas Instruments Incorporated
PVDD-AB
C32
C33
1µF
1µF
GND
PVDD-CD
U4
38
44
C27
PVDD_AB
BST_A
C47
C48
37
0.033µF
PVDD_AB
1µF
1µF
36
43
C29
PVDD_AB
BST_B
0.033µF
31
PVDD_CD
30
PVDD_CD
GND
29
40
OUT_A
PVDD_CD
OUT_A
39
OUT_A
PWMA
GVDD_AB
1
GVDD_AB
TP2
VDD
2
VDD
35
OUT_B
OUT_B
GVDD_CD
22
GVDD_CD
PWMB
DVDD
DNP
TP5
1µF
TP18
11
DVDD
AVDD
OUT_C
32
OUT_C
DNP
1µF
TP19
14
AVDD
PWMC
TP7
INPUT_A
OUT_D
5
28
INPUT_A
OUT_D
27
OUT_D
PWMD
INPUT_B
6
INPUT_B
TP9
INPUT_C
16
INPUT_C
INPUT_D
17
24
C52
INPUT_D
BST_C
OC-ADJ
0.033µF
DNP
TP24
C54
23
BST_D
R13
0.033µF
7
OC_ADJ
22.0k
GND
M1
CLIP_OTW
3
21
M1
CLIP OTW
M2
VBG
4
20
M2
VBG
DNP
19
FAULT
FAULT
TP27
TP13
RESET
18
GND
RESET
C68
TP6
0.1µF
15
42
C_START
GND
41
GND
34
GND
GND
10
33
OC_IOP
GND
9
26
OC_IOM
GND
25
GND
8
13
FREQ_ADJ
GND
12
GND
TPA3251D2DDVR
GND
TP14
HEATSINK
TP1
DNP
FREQ_ADJ
TP26
GND
CLIP_OTW
FAULT
RESET-SW
J13
DNP
DNP
R30
FAULT
0
3.3V
R24
47k
FAULT
U1
D3
10
VIN
VCC
3A
BST
R2
8
RON/SD
SW
182k
7
SS
ISEN
5
RTN
FB
C12
4700pF
4
SGND
DAP
LM5010ASD/NOPB
GND
GND
+12V
R58
D6
Green
1.50k
12V
3.3V
R34
D5
Green
360
3.3V
C91
C70
C89
C72
10µF
10µF
10µF
0.1uF
GND
GND
GND
Hi Current Shunt
J22
L2
C21
OUT_A
OA
OUTA
7uH 6.5A
1500µF
MA5173
C25
C24
DNP
1000pF
0.68µF
DNP
C85
DNP
1µF
GND
GND
DNP
Hi Current Shunt
J23
L3
C34
OUT_B
OB
OUTB
7uH 6.5A
MA5173
1500µF
C36
C35
DNP
1000pF
0.68µF
DNP
GND
GND
Hi Current Shunt
J24
L4
C42
OUT_C
OC
OUTC
7uH 6.5A
VBG
MA5173
1500µF
C44
C43
DNP
1000pF
0.68µF
DNP
C86
DNP
1µF
GND
GND
DNP
Hi Current Shunt
J25
L5
C56
OUT_D
OD
OUTD
7uH 6.5A
MA5173
1500µF
C60
C59
DNP
1000pF
0.68µF
DNP
FAULT
CLIP_OTW
GND
GND
TO
AIB
TO
CONNECTOR
OUTA
OUTB
ANALOG
OUTC
OUTD
FRONT END
3.3V
+12V
+12V
R31
R29
R28
1.00k
1.00k
47k
R35
R33
Q2
CLIP_OTW
Q1
D4
100
Red
100
FAULT
MONITORS
GND
GND
GND
Copyright © 2017, Texas Instruments Incorporated
9
C13
GND
L1
0.1uF
2
C1
15V-VR
0.047µF
100µH
1.5A
1
C7
R39
D1
5600pF
4.99k
3
1A
6
11
R40
1.00k
GND
GND
GND
GND
VMID
C90
0.1uF
GND
SLAU751 – November 2017
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TP3
J9
OUTA
TP10
OUTB
J11
GNDAB
Black
GND
TP11
J2
OUTC
TP12
OUTD
J20
GNDCD
Black
GND
C77
1µF
R54
3.30
DNP
DNP
DNP
DNP
C78
1µF
R55
3.30
DNP
DNP
DNP
DNP
C79
1µF
R56
3.30
DNP
DNP
DNP
DNP
C80
1µF
R57
3.30
DNP
DNP
DNP
DNP
GND
D2
Orange
OTW
GND
+15V
J31
Hi Current Shunt
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