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Class-D audio amps offer 64-step volume control

Posted: 02 Apr 2007 ?? ?Print Version ?Bookmark and Share

Keywords:Class-D audio amplifiers? Class-D amplifiers? audio amps?

Power Analog Microelectronics (PAM) has introduced what it touts as the industry's first 3W Class-D audio amplifiers with integrated 64-step digital volume control featuring its patent pending "filter-free" next-generation architecture.

PAM8803 is the latest addition to the company's Class-D audio amplifier line, and the first from its new innovative design architecture that delivers 3W stereo into a 4-ohm load at less than 10 percent THD+N. Its new architecture has inherently lower EMI than competing products with under 30dBuV/m, the lowest level tested among Class-D audio amplifiers in its class. Its efficiency is higher than 90 percent with an 8-ohm load. Only one input coupling capacitor per channel is needed in the external circuit.

PAM8803 comes with a built-in 64-step digital volume control, mute/enable function and is packaged in a 24-pin SOP. It is suitable for applications such as PMPs, MP3/4 players, GPS devices, PC speakers, portable DVDs, LCD monitors and notebook PC.

"Our patent pending filter-less architecture eliminates the requirement of external low pass filters, minimizes EMI, reduces the die size and lowers the BOM cost, making overall system design much simpler," said Johnston Chen, President and chief executive officer of PAM.

The PAM8803 family of products is in full production.

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