Texas Instruments Using The TPA301 EVM Stand-Alone, 3.4.1TPA301 EVM Connected for BTL Output

Using The TPA301 EVM Stand-Alone

3.4 Using The TPA301 EVM Stand-Alone

Using the TPA301 audio power amplifier evaluation module stand-alone is much the same as using it with the platform. The same 2.5-V to 5.5-V power supply range and the isolated OUT+ and OUT– lines for BTL operation re- quirement exists.

Note that the mute signal applied to the EVM shutdown pins must be able to supply enough current to overcome the pulldown resistors on the modules (20 kΩ 20 kΩ for two EVMs).

3.4.1TPA301 EVM Connected for BTL Output

Figure 3–8. TPA301 EVM Connected for Stereo BTL Output

5 VDC

Audio Input (Right)

External Mute

Control

(active high)

Audio

Input (Left)

	Shutdown		+5 V		GND
			C6			R5
S1				C3		C5
						DL
R1
						OUT–
C2
						GND
				U1
R2			C4
						OUT+
C1			R3			Lit.#
		–3				SLOP 115
	IN+
		R4
	GND					EVM
	TPA301
		5 VDC				GND
	Shutdown		+5 V		GND
			C6			R5
S1				C3		C5
						DL
R1
						OUT–
C2
						GND
				U1
R2			C4
						OUT+
C1			R3			Lit.#
		–3				SLOP 115
	IN+
		R4
	GND					EVM
	TPA301

Right

Left

Details 3-11