Power Up - Texas Instruments
TPA3003D2EVM User Manual

Note:
Do not leave the MUTE pin floating. The TPA3003D2EVM connects the
MUTE pin to ground. If the MUTE function is to be utilized on the EVM, un-
solder the pin and lift it off the module circuit board. Solder a wire to the pin
and apply the necessary voltage for the desired function.
3) FADE: This pin controls the stereo class–D outputs of the amplifier
Note:
Do not leave the FADE pin floating. The TPA3003D2EVM connects the-
FADE pin to ground. If the fade function is to be disabled, unsolder the pin
and lift it off the module circuit board. Solder a wire to the pin and apply the
necessary voltage for the desired function.
2.1.5

Power Up

1) Verify correct voltage and input polarity and set the external power supply
2) Adjust the signal source level as needed.
Adjusting the Speaker Volume
3) Adjust the speaker (connected across OUT+ and OUT–) volume as
Test Pins for Speaker Volume
-
(ROUT+, ROUT – , LOUT+, and LOUT – ) during the four states of the
device (power on, power off, coming out of shutdown, and going into
shutdown). This pin is active low. A low on this pin causes the outputs
(OUT+, and OUT – ) to slowly ramp up to volume, when the device is
powered on or when the device comes out of the shutdown state. A low also
causes the outputs to slowly ramp down in volume when the device goes
into shutdown. A high on this pin causes the outputs (OUT+, and OUT – )
to instantaneously ramp up to volume when the device is powered on or
when the device comes out of the shutdown state. A high also causes the
outputs to instantaneously ramp down in volume when the device goes
into shutdown. The absolute maximum voltage on this terminal is 5.5 V.
to ON. The EVM begins operation.
needed by turning the P1 potentiometer in the clockwise direction to
increase the volume. Conversely, turn P1 in the counterclockwise
direction to decrease the volume. Refer to Table 3–2 in the Reference
section for volume control settings.
T1 – VOL – Speaker volume
Quick Start List for Stand-Alone Operation
Operation 2-3