INR-
INR+
INL+
INL-
Operation
www.ti.com
2
Operation
This section describes how to operate the TPA6136A2EVM.
2.1
Quick-Start List for Stand-Alone Operation
Use the following steps when operating the TPA6136A2EVM stand alone or when connecting the EVM
into an existing circuit.
2.1.1
Power and Ground
1. Verify that the external power sources are set to OFF.
2. Set the power supply voltage between 2.5 V and 5.5 V. When connecting the power supply to the
EVM, first connect the ground connection to the GND connector, and then connect the positive supply
to the V
DD
connector. Verify that the connections are made to the correct pin connector.
2.1.2
Inputs and Outputs
2.1.2.1
Audio
1. Verify that the audio source is set to the minimum level.
2. Connect the audio source to the inputs, INL and INR.
3. Connect INL+ and INR+ to ground for single-ended input.
4. Connect a headset or other load to the headphone jack.
2.1.2.2
Shutdown Controls
1. Shutdown is controlled by pushbutton S1. Press and hold S1 to place the TPA6136A2 in shutdown.
Release S1 to reactivate the TPA6136A2.
2.1.3
Gain Setting
Set the gain of the TPA6136A2 at GAIN. Set GAIN = LOW for 0 dB. Set GAIN = HIGH for 6 dB.
2.1.4
HI-Z Control
Output will be in high-Z state when HI-Z = HIGH. Set HI-Z = LOW to disable the high-Z mode.
2
TPA6136A2 EVM
SLOU255A – June 2009 – Revised December 2009
Copyright © 2009, Texas Instruments Incorporated
