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3.7 Using The TPA032D03 Class-D EVM Stand-Alone
Using the TPA032D03 mono class-D audio power amplifier evaluation module
stand-alone is much the same as using it with the platform. The same 9-V to
14-V power supply range and the isolated OUT+ and OUT– lines for BTL
operation requirements exist. Inserting a plug into the EVM headphone jack
switches the EVM to the headphone mode and shuts down the class-D
amplifier section. Figure 3–3 shows the connections that are required for
operation (with the exception of the fault monitor circuit, which is optional). The
discussion in this section is in reference to this figure unless otherwise noted.
Figure 3–3. TPA032D03 Class-D EVM Stand-Alone Connections for Mono BTL Output
5 V
R
R
LED 0
Fault
Monitor
Headphone
Output Jack
Right HP
Input
Mode
Audio
Line
Inputs
Left HP
Input
Note:
Capacitor C11 is optional (not assembled) and a location for it on the EVM PCB has been provided to increase design
flexibility and allow decoupling capacitance to be added.
3.7.1
Power Connections
Power must be connected to both the VCC and VDD module pins. Power
supply ground can be connected to any module ground pin, although best
results are achieved if power supply grounds are connected to the pins
adjacent to the VCC and VDD module pins. The ground and power wires
should be twisted to reduce inductance and noise pickup if they are long.
Using The TPA032D03 Class-D EVM Stand-Alone
LED 1
SLOP310
C1
R4
SD
S1
Mute
S2
C3
C4
R2
C2
VDD
5 V
12 V
TPA032D03 EVM Board
VCC
GND
Mute
SD
OUT–
OUT+
GND
VCC
Details
Mute
Shutdown
3-7
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