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Class-D amp with boost converter extends battery life

Posted: 18 Jun 2010 ?? ?Print Version ?Bookmark and Share

Keywords:Class-D amplifier? boost converter? Li-ion battery?

TPA2015D1 Class-D amp

Texas Instruments Inc. has released a 2W mono Class-D audio amplifier with integrated boost converter, which delivers 36 percent louder audio than competitive devices, consistent across the entire Li-ion battery range.

The highly efficient TPA2015D1 allows more than twice the battery life compared to the nearest competing amplifier and is available in a compact 2mm x 2mm WCSP package for space-constrained applications including smart phones, notebooks, portable navigation devices, portable docking station and portable DVD players. In addition, the amplifier incorporates battery monitoring AGC and SpeakerGuard technology to prevent early shutdown at low battery voltages and prevents clipping, which protects speakers.

The TPA2015D1 features 2W into 8? at 3.6V (6 percent THD) results in 36 percent louder audio than the leading competition. The constant output power of 2W (3.6V to 5V) provides consistent audio loudness across the Li-Ion battery range. Battery monitoring AGC prevents early shutdown at low battery voltages (In addition, the device's high-efficiency (8% @1W and 3.6V) and ultralow quiescent current (1.7mA) result in 2x longer battery life and 5x lower quiescent current than the competition. The device also reduces the external components by more than 50 percent and total solution size to 20.25mm?, for space-constrained consumer electronics.

The TPA2015D1 is available today in a 2mm x 2mm, 0.5mm pitch 16-ball WCSP for $1.10 in 1,000-unit quantities. The TLV320AIC3254 audio codec with miniDSP and TPA6141A2 Class-G audio headphone amp are also available to complete the audio signal chain.

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