Louder audio from portables with audio speaker driver IC

November 06, 2013 // By Paul Buckley
Dialog Semiconductor plc has unveiled a new range of Class D audio speaker driver ICs.  The device provides greater power output and improved efficiency levels for Ultrabooks, tablets and speaker accessories powered by a dual cell battery pack.

The DA7202 low EMI Class D speaker driver is designed with a small footprint and helps keep devices, such as the popular Ultrabook, as light and compact as possible for the consumer.

The DA7202 is available in a 9 bump WLCSP package, 0.5 mm pitch that enables low cost printed circuit board (PCB) technology. The increased power output does not compromise the speaker audio quality and is designed to provide 90 dB Total Harmonic Distortion plus noise (THD+N) and 100 dB Signal to Noise ratio.

Historically, most mobile computing devices have used a CODEC with an integrated Class D amplifier, providing a speaker driver output limited to 1W. Using a dual cell Class D amplifier improves the power output of the device, driving up to 3.5 Wrms, which equates to a 3.5x increase of power into the speaker. In addition to a higher power output, this audio architecture maintains better efficiency, as having a direct connection from the battery to Class D amp eliminates DC-DC power loss.

Dialog Semiconductor;  www.dialog-semiconductor.com