Texas Instruments TPA 311 manual ±1. The TI Plug-N-Play Audio Amplifier Evaluation Platform

Precautions

3.1 Precautions

Power Supply Input Polarity and Maximum Voltage

Always ensure that the polarity and voltage of the external power connected to VCC power input connector J1, J2, and/or VDD power input connector J6 are correct. Overvoltage or reverse-polarity power applied to these terminals can open on-board soldered-in fuses and cause other damage to the platform, installed evaluation modules, and/or the power source.

Inserting or Removing EVM Boards

Do not insert or remove EVM boards with power applied Ð damage to the EVM board, the platform, or both may result.

Figure 3±1. The TI Plug-N-Play Audio Amplifier Evaluation Platform

Power Input

In +	VCC(J1) DC SOURCE J1 VCC
AC/DC In	D4 J2	D3

JP1			JP2		JP3		F1	C1+	Off
	(J2)	AC/DC		Batt		VR1
									Pwr
	D2			D1

On	ICC
S1	JP4

B1
IDD	JP5

SUPPLY	POWER			VR2
		U6	F2	DC
				Power
				In/Out
				+
				J6 VDD In/Out

Audio Input

Right In	J3
Stereo In	J4
Left In	J5

TEXAS INSTRUMENTS 1997

LED1 VCC	R1
Signal Conditioning
	U1

****CAUTION****

Do not insert or remove EVM boards with power applied

Plug-N-Play Audio Amplifier

Evaluation Platform

SLOP097 Rev. C.1

	Audio
	Power
	Amps
S2	Off	U3
Conditioning	On	U4

U5

TP1

GND

R2		LED2 VDD			J7
					Right Out
						J8
						+
					Right Out
	U2					±
						+
					Left Out
		JP6	Mode			±
			Mute
U2-U4 U5	HP(U5)	Polarity		Spk(U2-U4)		J9
		JP7	JP8
		Lo
		Hi			Left Out
						Stereo
		+		C3

S3 HP Source + C2 J10

R3 HP Out

R4 R5

Speaker

Output

Headphone Output

3-2 Details