The TPA3140D2 is an
efficient, Class-D audio power amplifier for driving bridged-tied stereo speakers at up to 10 W/6 Ω
or 8 Ω (per channel).
Advanced EMI Suppression Technology with Spread Spectrum Control and 1SPW modulation
scheme enables the use of inexpensive ferrite bead filters at the outputs while meeting EMC
requirements for system cost reduction. TPA3140D2 is not only fully protected against shorts and overload, the
SpeakerGuard™ speaker protection circuitry includes
an adjustable Automatic Gain Limit (AGL), an adjustable power limiter and a DC detection circuit
for protection of the connected speakers. The AGL allows adjustment of the maximum output voltage
without signal clipping for enhanced speaker protection and audio quality. The DC detect and
Pin-to-Pin, Pin-to-Ground and Pin-to-Power Short Circuit protection circuit protect the speakers
from output DC and pin shorts caused in production. The outputs are also fully protected against
shorts to GND, PVCC, and output-to-output. The short-circuit protection and thermal protection
includes an auto recovery feature.
The TPA3140D2 can
drive stereo speakers with as low as 4-Ω impedance. The high efficiency of the
TPA3140D2, 90% with 8-Ω load,
eliminates the need for an external heat sink, and TPA3140D2 will be able to output full power on a 2-layer PCB.
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