User's Guide Power Amplifier SLOU020A

Using The TPA311 MSOP EVM Stand-Alone
3-12
Details
3.4 Using The TPA311 MSOP EVM Stand-Alone
Using the TPA311 MSOP 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 requirement 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).
3.4.1 TPA311 MSOP EVM Connected for BTL Output
Figure 3–8. TPA311 MSOP EVM Connected for Stereo BTL Output
5 VDC
Audio
Input
(Right)
5 VDC
Audio
Input
(Left)
External Mute
Control
(active high)
GND
Right
Left
OUT+
IN+
GND
Vdd GND
U1
†
R2
Shutdown
R3
OUT–
GND
C5
TEXAS
INSTRUMENTS
SLOP123
TPA311 MSOP EVM
C4
C1
C2
R4
SE\BTL*
C3
S1
R1
+
OUT+
IN+
GND
Vdd GND
U1
†
R2
Shutdown
R3
OUT–
GND
C5
TEXAS
INSTRUMENTS
SLOP123
TPA311 MSOP EVM
C4
C1
C2
R4
SE\BTL*
C3
S1
R1
+
†
Due to the very small size of the MSOP IC package, the standard part number TPA311 is replaced with the code TIAAB
Note: The SE/BTL* (SE/BTL
) EVM pin is pulled to GND through a 20-KΩ resistor on the module.