Texas Instruments TPA0142, Руководство пользователя

Страница: 30 / 34

Power Requirements
3-14 Details
3.3.5 Power Requirements
The TPA0142 audio power amplifier evaluation module can operate from any
voltage between approximately 4.5 V and 5.5 V; however, the TPA0142
amplifier IC on the module is characterized for operation at 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 different 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 onboard 9 -V battery. Or, an external regulated power source can
be used to supply V
DD
voltage to the platform and the TPA0142 evaluation
module installed on it.
Although the TPA0142 amplifier IC draws approximately 0.65 A from the
power supply during continuous full power output, peak current draw can be
as high as 1 A. Any power supply connected to the platform should be capable
of providing 1 A of current to avoid clipping of the output signal during peaks.
Current consumption driving speakers at normal listening levels is typically
0.3 A or less.
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 TPA0142 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.