Datasheet

Quick Start List for Stand-Alone
2-6
Operation
 Evaluation Module Preparations
6) Jumpers S2 and S3 select the least significant bits of the EVM I
2
C
address. See section 2.5.3 for details .
7) 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 2–4. Typical TPA0172 EVM Jumper Settings
EVM S2 S3 S4
TPA0172 OFF ON ON
Note: ON = Shunt installed, OFF = Open
8) 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 2–5). To ensure a common ground path,
connect a ground wire between a ground point on the I
2
C transmitting
device and GND on the EVM. See section 2.5.3 for details.
Table 2–5. 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
 Control Inputs
9) Connect control lines to the various module control input pins as needed:
a) SE/BTL
: A high selects the single-ended (SE) output mode; a low or
float selects the bridge-tied load (BTL) output mode.
b) SHUTDOWN: A low shuts down the amplifier IC on the module; a high
or float allows normal operation.
 Power-up
10) Verify correct voltage and input polarity and set the external power supply
to
ON.
The EVM should begin operation.
11) Adjust the signal source level as needed.