Texas Instruments TPA721, User Manual

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Using The TPA721 MSOP EVM Stand-Alone
3-11 Details
3.4 Using The TPA721 MSOP EVM Stand-Alone
Using the TPA721 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 k
Ω
|| 20 k
Ω
for two EVMs).
3.4.1 TPA721 MSOP EVM Connected for BTL Output
Figure 3–8. TPA721 MSOP EVM Connected for Stereo BTL Output
Audio Input
(Left)
External Mute
Control
(active high)
Right
5 VDC
Audio Input
(Right)
5 VDC GND
Left
OUT+
IN–
GND
Vdd GND
U1 †
Shutdown
R5
OUT–
GND
C4
TEXAS
INSTRUMENTS
SLOP215
TPA721 MSOP EVM
C6
C5
S1
R1
+
R2
C2
C1
R3
R4
C3
OUT+
IN–
GND
Vdd GND
U1 †
Shutdown
R5
OUT–
GND
C4
TEXAS
INSTRUMENTS
SLOP215
TPA721 MSOP EVM
C6
C5
S1
R1
+
R2
C2
C1
R3
R4
C3
† Due to the very small size of the MSOP IC package, the standard part number TPA721 is replaced with the code TIABC.