The TPA3144D2 is an
efficient, Class-D audio power amplifier for driving bridged-tied stereo speakers at up to
6 W, 6 Ω, or 8 Ω (per
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. TPA3144D2 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 TPA3144D2 can
drive stereo speakers with as low as 4-Ω impedance. The high efficiency of the
TPA3144D2, 90% with an 8-Ω
load, eliminates the need for an external heat sink, and TPA3144D2 will be able to output
full power on a 2-layer PCB.
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