Texas Instruments TPA0242 manual Quick Start List for Stand-Alone, ±3. Quick Start Module Map

Quick Start List for Stand-Alone

2.3 Quick Start List for Stand-Alone

Follow these steps to use the TPA0242 EVM stand-alone or when connecting it into existing circuits or equipment. Connections to the TPA0242 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±3 and details appear in Chapter 3.

Figure 2±3. Quick Start Module Map

9

R HP

GND

R LINE±

SHUTDOWN

R IN+

S1

R1

C1

C2

L IN+ R2

	VDD						GND
			+			C10
C3		C4	C5	C6	R3		R4		S2	S3	S4
							C11
							U1
								C12

ROUT+

GND

ROUT±

HP/LINE

SE/BTL

PCBEEP

TEXAS INSTRUMENTS

SHUTDOWN

8

7

6

L LINE±

GND

L HP

TPA00242 EVM Board

C7	C8	C9		LOUT±
	+	C13	SLOP275	GND
VDD		GND		LOUT+

-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 VDD and GND pins taking care to observe marked polarity.

-Inputs and outputs

3)Ensure that audio signal source level adjustments are set to minimum.

4)Connect the right (left) positive lead of the audio source to the module R LINE± (L LINE±) pins and the negative lead to the R IN+ (L IN+) pins. If using the headphone inputs, connect the positive audio source to the module R HP (L HP) and the negative lead to R IN+ (L IN+). The inputs can be used with a differential or single-ended audio source, but the headphone and line have common positive inputs.

5)Select output mode:

a)For BTL output, connect a speaker to the module OUT+ and OUT± pins of each channel,

or

b)For single-ended output, connect a headphone or a speaker to the module OUT+ and GND pins of each channel through a 33 ∝F to 1000 ∝F output-coupling capacitor (Figure 3±10).

Quick Start 2-5