Texas Instruments SLOU082 - Manual (Page 14)

Quick Start List for Stand-Alone
2-4 Quick Start
2.3 Quick Start List for Stand-Alone
Follow these steps to use the TPA032D03 class-D EVM stand-alone or to
connect it into existing circuits or equipment. Connections to the TPA032D03
module header pins can be made via individual sockets, wire-wrapping, or
soldering to the pins, either on the top or the bottom of the module circuit board.
- Power supply
1) Ensure that all external power sources are set to OFF.
2) Connect an external regulated power supply set to 12 V to the module
VCC and GND pins taking care to observe marked polarity. It is only
necessary to use the ground pins adjacent to the module power pins.
3) Connect an external regulated power supply set to 5 V to the module VDD
pin taking care to observe marked polarity.
- Inputs and outputs
4) Ensure that audio signal source level adjustments are set to minimum.
5) Connect the audio source across the module IN+ and IN– pins for class-D
operation, taking care to observe marked polarity. For single-ended input,
the negative input pin (IN–) should be connected to the ground of the audio
signal source.
6) Connect a control signal to the module Mute pin, if necessary. The control
signal should be high (2 V to 5 V or left floating) for normal operation, or
low (tied to ground) to mute the output.
7) Connect a control signal to the module SD pin, if necessary. The control
signal should be high (2 V to 5 V or left floating) for normal operation, or
low (tied to ground) to shut down the TPA032D03 amplifier IC on the EVM.
Note that the control signals applied to the EVM Mute and SD inputs must have
sufficient current capability to overcome the 100-k
Ω
pullup resistor on each
input. Miniature pushbutton switches on the EVM allow manual shutdown (S2)
and manual muting (S1) of the amplifier.
8) Connect a 4-
Ω
– 8-
Ω
speaker to the module OUT+ and OUT– pins, taking
care to observe marked polarity.
- Power up
9) Verify correct voltage and input polarity and set the external power supply
to ON.
The EVM should begin operation.
10) Adjust the signal source level as needed.