Global Sources
EE Times-Asia
Stay in touch with EE Times Asia
EE Times-Asia > Power/Alternative Energy
Power/Alternative Energy??

Audio amp integrates boost converter for portable apps

Posted: 08 May 2008 ?? ?Print Version ?Bookmark and Share

Keywords:Class-D amplifier? audio amp? boost converters? portable applications?

A monolithic, filter-free Class-D audio amplifier with an integrated boost converter for portable applications including wireless handsets, personal navigation devices, portable gaming and wireless speakers has been introduced by Texas Instruments Inc. The TPA2014D1 provides up to 1.5W across an 8? load, ensuring that volume is maintained even when the battery discharges to its minimum voltage.

Conventional Class-D amplifiers for portable devices are designed to provide high output power, which is dependent on battery voltage. As the battery discharges, the maximum output power decreases, causing reduced volume and increased distortion. The TPA2014D1 provides a higher constant output power across the entire Li-ion battery range, thus maintaining loud volume, even as the battery discharges. In addition, the TPA2014D1 has a high overall efficiency of 85 percent, which results in longer battery life and increased talk/playback time.

Additional features of the device enhance portable audio performance. The TPA2014D1 features a wide voltage supply range of 2.5V to 5.5V and a power supply rejection ratio of 91dB, which simplify power supply design and enable a connection directly to the battery without any degradation of sound quality. The TPA2014D1 includes an integrated phase-locked loop which synchronizes the Class-D amplifier and boost converter clocks in order to eliminate potential audible beat frequencies.

Pricing and availability
The TPA2014D1 Class-D audio power amplifier is available now from TI and its authorized distributors in a 4mm x 4mm QFN package and will be available at the end of May in a 2.3mm x 2.3mm WCSP package. Suggested resale pricing is $1.32 for the QFN package and $1.40 for the WCSP package in 1,000-piece quantities. Samples and EVMs are available.

Article Comments - Audio amp integrates boost converter...
*? You can enter [0] more charecters.
*Verify code:


Visit Asia Webinars to learn about the latest in technology and get practical design tips.

Back to Top