Texas Instruments TPA 311 manual TPA311 Audio Power Amplifier Evaluation Module, ±2. TPA311 EVM

The TPA311 Audio Power Amplifier Evaluation Module

3.2 The TPA311 Audio Power Amplifier Evaluation Module

The TPA311 Audio Power Amplifier Evaluation Module is powered by a TPA311 350-mW Low-Power Audio Amplifier IC and includes on-board gain adjustment, a shutdown control signal input with on-board switch, and can be operated in either the BTL or single-ended output mode.

The module can be used with the TI Plug-N-Play Audio Amplifier Evaluation Platform (Figure 3±1) or wired directly into circuits or equipment. The module has single in-line header connector pins mounted to the under side of the board. These pins allow the module to be plugged into the TI platform, which automatically makes all the signal input and output, power, and control connections to the module.

The module connection pins are on 0.1-inch centers to allow easy use with standard perf board and plug board-based prototyping systems, or to be wired directly into existing circuits and equipment when used stand-alone.

The module appears in Figure 3±2 and its schematic is shown in Figure 3±3.

Figure 3±2. TPA311 EVM
			Shutdown		VDD GND
						±3
			S1		C5
					C3	009227
			R1			OUT±
			C2			GND
			R5	C4	U1	OUT+
					R3	Literature #
			SE\BTL*
						SLOP116
				R2
			IN+C1
				R4
			GND TPA311			EVM
Figure 3±3. TPA311 EVM Schematic Diagram
					VDD		GND
					2 V to 5.5 V
						C5
S1						10 ∝F
	No	1				+
Shutdown			Shutdown VO ±		8
R1		2	Bypass	GND	7
20 kΩ	C2
		3			6		OUT±
	2.2 ∝F		SE/BTL	VDD
SE/BTL						C3	GND
		4			5
			In	VO +		2.2 ∝F
	R5
C1	100 kΩ						OUT+
1 ∝F						C4
			R3	R4
Audio Input+						5 pF
		20 kΩ		200 kΩ
	R2
GND
	20 kΩ

Details 3-3