Datasheet

Quick Start List for Platform
2-4
Operation
 Evaluation Module Preparations
Figure 2–2. Module Map
GND
ROUT+
ROUT–
SE/BTL
S1
SHUTDOWN
GND
LOUT–
LOUT+
C11
C9
VDD GND
L IN+
GND
L LINE–
L HP
VDD
GND
R HP
R LINE–
GND
R IN+
C12
+
TPA0172 EVM Board
SLOP211
Rev. A
+
1999
TEXAS
INSTRUMENTS
R4
R3
TP1
C1
P1
R5
Q1
S3
R1
C3
C5
C4
TP2
U1
C2
C7
C6
C8
S4
R2
C10
S2
TP5
R6
R8
TP3
Q2
TP6
R7
R9
TP4
12
11
11) Jumpers S2 and S3 select the least significant bits of the EVM I
2
C
address. See section 2.5.3 for details .
12) To allow the module SE/BTL control input to switch the amplifier IC
between single ended (SE) and bridge-tied load (BTL) output modes, set
output mode jumper S4 to OFF . To keep the module amplifier IC in the
single-ended output mode regardless of the control input state, set jumper
S4 to ON .
Table 2–2. Typical TPA0172 EVM Jumper Settings
EVM S2 S3 S4
TPA0172 OFF ON ON
Note: ON = Shunt installed, OFF = Open
13) When the module powers up or comes out of shutdown, the gain is set at
the –85 dB level. Gain settings can be adjusted through an I
2
C interface,
connecting to the EVM via connector P1 or through test point terminals
TP3, TP4, TP5, and TP6 (Table 2–3). See section 2.5.3 for details.
Table 2–3. TPA0172 EVM Gain Control
CONNECTOR P1 TEST POINT TERMINAL FUNCTION
Pin 1 TP6 SDA input
Pin 10 TP3 SCL output
Pin 14 TP5 SCL input
Pin 15 TP4 SDA output
 Power Up
14) Verify correct voltage and input polarity and set the external power supply
to ON . If V
CC
and an on-board regulator EVM are used to provide V
DD
, set
platform power switch S1 to ON .
Platform LED2 should light indicating the presence of V
DD
, and the evaluation
modules installed on the platform should begin operation.
15) Adjust the signal source level as needed.