TPA3144D2 Class-D Audio Power Amplifier

Texas Instruments offers its 6 W inductor-free stereo (BTL) Class-D audio amplifier with ultra-low EMI and AGL

Image of Texas Instruments' TPA3144D2 Class-D Audio Power AmplifierTexas Instruments' 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 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. 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 8 Ω load, eliminates the need for an external heat sink, and TPA3144D2 will be able to output full power on a two-layer PCB.

  • 2 x 6 W/ch into 4 Ω loads at 10% THD+N from a 7 V supply
  • 2 x 6 W/ch into 6 Ω loads at 10% THD+N from a 9.5 V supply
  • 2 x 6 W/ch into 8 Ω loads at 10% THD+N from a 10 V supply
  • Up to 90% efficient Class-D operation (8 Ω) eliminates need for heat sinks
  • <0.05% THD+N at 1 W/4 Ω/1 kHz
  • <65 µV A-wgt output noise
  • Wide supply voltage range allows operation of SpeakerGuard speaker protection circuitry; includes from 4.5 V to 14.4 V
  • Inductor-free operation
  • Enhanced EMI performance with spread spectrum and 1SPW operation
  • SpeakerGuard speaker protection includes automatic gain limit, adjustable power limiter, and DC protection
  • Robust pin-to-pin, pin-to-ground, and pin-to-power short circuit protection and thermal protection
  • Four selectable, fixed gain settings
  • Single ended or differential analog inputs
  • Click and pop free startup

TPA3144D2 Class-D Audio Power Amplifier

ImageManufacturer Part NumberDescriptionTypeOutput TypeAvailable QuantityView Details
IC AMP CLASS D STER 6W 28HTSSOPTPA3144D2PWPRIC AMP CLASS D STER 6W 28HTSSOPClass D2-Channel (Stereo)994 - ImmediateView Details
Published: 2015-11-12