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The TPA005D12 Class-D Audio Power Amplifier Evaluation Module
3-3
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3.2 The TPA005D12 Class-D Audio Power Amplifier Evaluation Module
The TPA005D12 class-D stereo audio power amplifier evaluation module is
powered by a TPA005D12 class-D stereo power amplifier integrated circuit.
The EVM is capable of delivering greater than 2 W of continuous average
power per channel into 4-Ω loads at less than 0.6% THD+N over a 20-Hz to
20-kHz frequency range from a 5-V supply.
The TPA005D12 amplifier IC operates in the bridge-tied load (BTL) mode for
maximum efficiency during class-D operation. The high IC switching
frequency reduces the size of the output filter to three small capacitors and two
small inductors per class-D channel. The evaluation module includes onboard
pushbutton switches for manual muting and shutdown, and input pins for logic
control of mode, mute, and shutdown.
The module can be used with the TI plug-n-play audio amplifier evaluation
platform (Figure 3–1) or wired directly into circuits or equipment. The module
has single in-line header connector pins mounted to the underside of the
board. These pins allow the module to be plugged into the platform, which
automatically makes all the signal input and output, power, and control
connections to the module.
The module connection pins are on 0.1-inch centers to allow easy use with
standard perf board and plug board-based prototyping systems. Or, the EVM
can be wired directly into existing circuits and equipment when used
stand-alone.
The module appears in Figure 3–2 (top side) and Figure 3–3 (bottom side),
and its schematic is shown in Figure 3–4. Note that several components are
mounted on the bottom side of the EVM PCB.