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Operation
2
Operation
2.1
Quick-Start List for Stand-Alone Operation
2.1.1
Speaker Amplifier
Follow these steps to use the TPA6047A4EVM stand-alone or when connecting it into existing circuits or
equipment. Connections to the EVM can be made by inserting stripped wire or using banana plugs for the
power supply and output connections. The inputs accept standard RCA plugs.
2.1.2
Power Supply
1. Ensure that all external power sources are set to OFF.
2. Connect an external regulated power supply adjusted to 5 V to the module VDD and GND banana
jacks, taking care to observe marked polarity.
2.1.3
Evaluation Module Preparations
Inputs and Outputs
1. If connecting to a fully differential input or a grounded input (the shield of the RCA is GND), remove
jumpers JP1 and JP2 from the EVM. If connecting to a floating source like a portable CD, install
jumpers JP1 and JP2. After setting the JP1 and JP2 jumpers appropriately, connect the input source to
either the speaker inputs (SPKR_LIN, SPKR_RIN) or the headphone inputs (HP_INL, HP_INR) or
both.
2. Connect a speaker across LOUT+ and LOUT-. Connect another speaker across ROUT+ and ROUT-.
3. Install both gain jumpers GAIN0 and GAIN1 at position 0. This sets the gain of the amplifier to the
lowest level, 10 dB.
4. Connect a set of headphones to the headphone output jack (HP_OUT).
Control Inputs
1. Speaker Enable: Set jumper SPKR_EN at position 1 to enable the speaker amplifer. Set at 0 to
disable the amplifier.
2. Headphone Enable: Set jumper HP_EN at position 1 to enable the headphone amplifer. Set at 0 to
disable the amplifier.
3. GAIN0/GAIN1: Together, these terminals determine the gain of the amplifier. See
4. Regulator Enable: Set jumper REG_EN at position 1 to enable the regulator. Set at 0 to disable the
regulator.
2
List of Tables
www.ti.com
Table
1.
SLOU240 – August 2007
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