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Class-D audio power amplifier integrates boost converter

Dallas, Tex.—Texas Instruments Inc. has introduced a monolithic, filter-free, Class-D audio power amplifier with an integrated boost converter, which provides constant output power for portable applications such as personal navigation devices, PDAs, mobile phones, portable media players and handheld gaming devices.

The combination of the 2.7-W Class-D amplifier and integrated boost converter provides 85% overall efficiency with little heat dissipation to prolong battery life. The TPA2013D1 generates high output power from a low supply voltage without distorting the audio. The device has a wide supply voltage operation of 1.8-V to 5.5-V to simplify power supply design and allow for direct connection to the battery.

The device provides a maximum output power of 2.7-W across a 4-Ohm load or 2.2-W across an 8-Ohm load in addition to providing an adjustable constant output power of up to 1.5-W in the entire Lithium-Ion battery range of 2.3 V to 4.8 V. This capability makes the audio output power insensitive to battery voltage fluctuations, thereby maintaining audio quality and volume as the battery discharges.

Pricing: In 1,000-unit quantities is $1.55 for the WCSP and $1.45 for the QFN package.

Availability: In a 2.3-mm x 2.3-mm, 16-ball WCSP package or in a 20-pin, 4-mm x 4-mm QFN package.
Datasheet: TPA2013D1.

Texas Instruments Inc., 1-800-477-8924, www.ti.com

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