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Class-D audio amps reduce BOM

Posted: 31 Aug 2009     Print Version  Bookmark and Share

Keywords:Class D  audio amplifier  analogue 

TPA3110D2 audio amp

Texas Instruments Inc. has launched a 15W stereo, true filter-free, analogue-input, Class-D audio amplifier. The TPA3110D2 device's advanced EMI suppression technology eliminates the need for costly inductor-based output filters, which can bring down BOM by as much as 50 per cent. The amplifier also features SpeakerGuard protection circuitry that helps reduce end equipment customer returns and associated support costs.

The device is suited for consumer audio applications, including HDTVs, media docking stations, digital radios and sound bars.

The filter-free advanced EMI suppression technology reduces BOM while meeting EMC performance specifications. Costly inductor-based output filters are replaced with low-cost ferrite bead filters, also reducing board space. The SpeakerGuard technology includes an adjustable power limiter and DC protection circuitry on the audio inputs, preventing speakers from being overdriven or damaged by DC currents due to board component failure or defects on the audio input circuitry Also, ultra low THD+N performance of <0.1 per cent THD+N over full power range at 1kHz and advanced click-and-pop suppression circuitry enables outstanding audio performance and fidelity.

Layout is simplified by flow-through pin-out that also optimises thermal performance, with high-voltage pins on one side and input and control pins on the other. Plus, the device touts differential inputs that enable common mode noise rejection and high-fidelity audio.

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