Texas Instruments TPA301 User Manual download pdf (Page 14)

Quick Start List for Stand-Alone

2-4

Quick Start

2.3 Quick Start List for Stand-Alone

Use the following steps to use the TPA301 EVM stand-alone or when

connecting it into existing circuits or equipment. Connections to the TPA301

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.

Numbered callouts for selected steps are shown in Figure 2–2 and details

appear in Chapter 3.

Figure 2–2. Quick Start Module Map

IN+

Shutdown

OUT–

GND

OUT+

GND

GND+5 V

EVM

–3

Lit.#

SLOP 115

TPA301

Gain Adjust

Power supply

1) Ensure that all external power sources are set to OFF

2) Connect an external regulated power supply set to 5 V to the module +5V

and GND pins taking care to observe marked polarity

Inputs and outputs

3) Ensure that signal source level adjustments and EVM gain (R4) are set to

minimum

4) Connect the audio source to the module IN+ and GND pins taking care to

observe marked polarity

5) Connect the Shutdown pin to V

through a normally open switch

6) For BTL output, connect an 8-Ω – 32-Ω speaker to the module OUT+ and

OUT– pins, or

7) For single-ended output, connect a headphone or an 8-Ω – 32-Ω speaker

to the module OUT+ and GND pins through a 33 µF to 1000 µF output-

coupling capacitor (figure 3–9)

Power-up

8) Verify correct voltage and input polarity and set the external power supply

to ON

The EVM should begin operation.

9) Adjust the signal source level and EVM gain level (R4) as needed

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Texas Instruments TPA301 User Manual Page 14

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