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Power Requirements
3-9
Details
3.3.4 Power Requirements
The TPA701 MSOP Audio Power Amplifier Evaluation Module can operate
from any voltage between approximately 2.5 V and 5.5 V; however, the
TPA701 amplifier IC on the module is characterized for operation at 3.3 V and
5 V. For best performance (highest output power with lowest distortion), the
module should be operated at approximately 5 V, unless there is a specific
reason for operating it from a lower voltage.
The TI Plug-N-Play Audio Amplifier Evaluation Platform with a voltage
regulator EVM installed on it can provide a regulated V
DD
supply from a wide
variety of unregulated V
CC
voltage inputs between approximately 5.5 V and
12 V, including an on-board 9-V battery. Or, an external regulated power
source can be used to supply V
DD
voltage to the platform and the TPA701
MSOP evaluation modules installed on it.
The platform is equipped with overvoltage and reverse-polarity supply voltage
input protection in the form of fused crowbar circuits.
V
DD
voltage applied to platform screw terminals J6
MUST NOT
exceed
the absolute maximum rating for the TPA701 amplifier IC installed on the
evaluation module (6 V) or damage to the IC may result. In no case should
V
DD
voltage of the incorrect polarity or in excess of 6.1 V be applied to
screw terminals J6 of the platform, or the power protection circuit on the
V
DD
line will trip.
V
CC
voltage applied to the platform
MUST NOT
exceed the maximum
voltage input specified for the voltage regulator module installed in socket
U6 (12 V for the SLVP097), or damage to the voltage regulator module
may result. In no case should V
CC
voltage applied to the platform exceed
15 V, or the overvoltage protection circuit on the V
CC
bus will trip.
3.3.5 Inputs and Outputs
The TI Plug-N-Play Audio Amplifier Evaluation Platform is equipped with
several standard conectors for audio inputs and outputs.
3.3.5.1 Inputs
In most cases, audio signals enter the platform through either a pair of RCA
phono jacks (J3 and J5) or a miniature (1/8″) stereo phone jack (J4). Certain
signal conditioning and amplifier EVMs, however, may have additional signal
input connectors mounted on the module circuit board.
The platform audio signal input jacks (J3, J4, and J5) are of the closed-circuit
type, grounding the signal input lines when no plugs are inserted.
3.3.5.2 Outputs
Amplified audio output signals leave the platform through left and right RCA
phono jacks (J7 and J9), left and right pairs of compression connectors for
stripped speaker wires (J8).