Datasheet

Reference
2-8
Operation
2.5 Reference
This section includes the TPA0172 EVM schematic, the EVM parts list, a
discussion of the I
2
C interface, and the module PCB layers.
2.5.1 EVM Schematic
Figure 2–5 shows the TPA0172 EVM schematic.
Figure 2–5. TPA0172 EVM Schematic Diagram
LOUT–GND
SCLLOUT+
PV
DD
BYPASS
I
2
CV
DD
RLINEIN
ADDRESS1
SDA
RIN
SE/BTL
SHUTDOWN
LIN
LHPIN
V
DD
LLINEIN
PCBEEP
10
9
12
11
6
5
8
7
2
1
4
3
19
18
17
16
15
14
13
20
LHP
ROUT–
TPA0172
LIN+
RIN+
C6 0.47 µF
C8 0.47 µF
ROUT+
ROUT–
GND
23
22
21
24
C7 0.47 µF
C2 0.47 µF
C10 0.47 µF
C3 0.47 µF
RHP
RLINE–
PCBEEP
TP2
LLINE–
SHUT
DOWN
V
DD
C9 10 µF
C5
0.1 µF
V
DD
LOUT–
LOUT+
SHUTDOWN
ROUT+
GND
RHPIN
ADDRESS0
PV
DD
R2 100 kΩ
ADDRESS0
S2
V
DD
C4 0.1 µF
C1 0.47 µF
R3 100 kΩ
S3
ADDRESS1
SE/BTL
S4
SE/BTL
R5 100 kΩ
C11
0.47 µF
TP1
CONNECTOR
P1
R4
0 Ω
R1
100 kΩ
S1
18
19
20
21
22
23
24
25
10
14
1
15
TP3
R8
1.82
kΩ
R6
100 kΩ
2N2222
Q1
TP5
R7
100 kΩ
TP6
2N2222
R9
1.82
kΩ
Q2
TP4
+
C12
10 µF
+
V
DD
†
V
DD
V
DD
V
DD
†
I
2
CV
DD
is connected to V
DD
via a blue wire on the evaluation module. To use a different voltage for the I
2
C interface, the wire
must be disconnected and the I
2
C power supply connected to TP1.
†