Texas Instruments TPA0242 manual Control inputs

Quick Start List for Stand-Alone

-Evaluation module preparations

6)To allow the module SE/BTL control input to switch the amplifier IC between single ended (SE) and bridge-tied load (BTL) output modes, set output mode jumper S3 to OFF. To keep the module amplifier IC in the single-ended output mode regardless of the control input state, set jumper S3 to ON.

7)To allow the module HP/LINE control input to switch the amplifier IC between using the HP pins and the LINE pins as the signal inputs, set the input mode jumper S3 to OFF. To keep the amplifier IC in the HP input mode regardless of the control input state, set jumper S3 to ON.

-Control inputs

8)To allow the amplifier IC to switch from the LINE inputs to the HP inputs when the output switches from BTL output mode to SE output mode and vice versa, set jumper S4 to ON. To allow the inputs and output modes to switch independently, set jumper S4 to OFF. Connect control lines to the various module control input pins as needed:

a)SE/BTL: A high selects the single-ended (SE) output mode; a low or float selects the bridge-tied load (BTL) output mode.

b)SHUTDOWN: A low shuts down the amplifier IC on the module; a high or float allows normal operation.

-Power-up

9)Verify correct voltage and input polarity and set the external power supply to ON.

The EVM should begin operation.

10) Adjust the signal source level as needed.

2-6 Quick Start