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Operation
2.1
Quick-Start List for Stand-Alone Operation
2.1.1
Speaker Amplifier
2.1.2
Power Supply
2.1.3
Evaluation Module Preparations
Operation
Follow these steps to use the TPA6043A4 EVM 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.
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 (J13) and GND (J14)
banana jacks, taking care to observe marked polarity.
Inputs and Outputs
1. If connecting to a fully differential input or a grounded input (the shield of the RCA is GND), remove
jumpers J3 and J4 from the EVM. If connecting to a floating source like a portable CD, install jumpers
J3 and J4. After setting the J3 and J4 jumpers appropriately, connect the input source to either the
speaker inputs (J1 and J2) or the headphone inputs (J11 and J12) or both.
2. Connect a speaker LOUT (J15) and –LOUT (J16). Connect another speaker ROUT
(J17) and –ROUT (J18).
3. Install both gain jumpers GAIN0 (J5) and GAIN1 (J6). This sets the gain of the amplifier to the lowest
level, 6 dB.
4. Connect a set of headphones to the headphone output jack (J10).
Control Inputs
1. Speaker Enable: This terminal is active-low. A LOW on the device terminal (<0.8 V) enables the
amplifier; a HIGH (>2 V) on the device terminal places the amplifier in the SHUTDOWN state. Holding
down switch S1 places the amplifier in the SHUTDOWN state. Releasing S1 returns the amplifier to
the active state.
2. Headphone Enable: This terminal is active-high. A LOW on the device terminal (<0.8 V) shuts down
the headphone amplifier; a HIGH (>2 V) on the device terminal places the headphone amplifier in the
active state. Holding down switch S2 places the headphone amplifier in the SHUTDOWN state.
Releasing S2 returns the headphone amplifier to the active state.
3. GAIN0/GAIN1: Together, these terminals determine the gain of the amplifier. See
. Installing a
jumper in J5 or J6 sets the respective terminal to GND. Removing the jumper sets the respective
terminals to VDD. Removing jumpers increases the gain whereas installing jumpers decreases the
gain. Logic levels are TTL compatible.
4. Regulator Enable: Shunt J7 and remove jumper for J19 to enable the regulator output. Remove
jumper for J7 and shunt J19 to disable the regulator output. Never shunt J19 if J7 is shunt.
SLOU204 – August 2007
List of Tables
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