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3.4.5 Power Requirements
The TPA005D12 class-D stereo audio power amplifier evaluation module is
designed to operate from a supply voltage between 4.5 V and 5.5 V. For best
performance (highest output power with lowest distortion), the module should
be operated at 5 V.
The TI plug-n-play audio amplifier evaluation platform provides several
options for powering the TPA005D12 class-D EVM. Table 3–3 shows the
platform
jumper and switch settings for each power source option (see the
User’s Guide for the TI plug-n-play audio amplifier platform, TI Literature
Number SLOU011 for more information). The TPA005D12 class-D EVM
requires no setup for power source selection.
Table 3–3.Platform Jumper and Switch Settings for the TPA005D12 EVM Power Inputs
POWER TYPE (Note 2) JP1 JP2 JP3 JP4 JP5 JP6 JP7 JP8 S1 S2 S3
VCC (J1) ON OFF OFF ON ON Mode X Hi ON Note 3 U5
AC/DC (J2) OFF ON OFF ON ON Mode X Hi ON Note 3 U5
Battery (B1) OFF OFF ON ON ON Mode X Hi ON Note 3 U5
VDD (J6) OFF OFF OFF X ON Mode X Hi ON Note 3 U5
Notes: 1) ON = Jumper installed, OFF = Jumper
NOT
Installed, X = Don’t care
2) Unregulated and battery sources must have a voltage regulator EVM (SLVP097) installed in platform socket U6.
3) Set to ON when Tone Control Board SLOP109 is installed in U1, otherwise set to OFF..
Although the TPA005D12 amplifier IC draws approximately 0.7 A per channel
from the power supply during continuous full power output, peak current draw
can be as high as 1.15 A per channel. Any power supply connected to the
platform should be capable of providing 2.3 A to avoid clipping of the output
signal during voltage peaks. Current consumption driving speakers at normal
listening levels is typically 0.1 A or less.
A V
DD
supply of 5 V is required if a signal processing EVM is installed in
platform socket U1 or a separate headphone amplifier EVM is installed in U5.
V
DD
can either be applied to the platform V
DD
power input terminals (J6) or a
voltage regulator (SLVP097 or equiv.) can be installed in platform socket U6
to provide V
DD
from the platform V
CC
supply.
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 TPA005D12 amplifier IC installed on
the evaluation module (5.5 V) or damage to the IC may result. In no case
should V
DD
voltage of the incorrect polarity or in excess of 6.0 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.