Class-D audio amplifiers are filter-free

Santa Clara, Calif.—Power Analog Microelectronics (PAM) has introduced its third generation of patent-pending filter-free Class-D audio amplifiers.

The PAM8303D, a single channel 3W audio amplifier, is the latest addition to PAM's Class D family of products. It can deliver 3W into a 4 Ohm load, and employs a unique filter-free architecture that has inherently lower EMI than competing products, according to the company. The parts pass the FCC Class B standard, while EMI is 10dB lower than the standard for frequencies up to 1000-MHz, which covers most cellular phone frequency ranges.

Its efficiency is higher than 90% with an 8-ohm load. Only one input coupling capacitor per channel is needed in the external circuit. The PAM8303D is available in a 9-ball WCSP, MSOP-8 and DFN 3×3 8-pin packages. It is fully Pb-free and compatible with RoHS. Applications include cell-phones, MP3/MP4, PMP, GPS navigators, and portable-game machines.

The PAM8303D will be showcased and demonstrated at PAM's booth at the Shenzhen Convention & Exhibition Center located in Main Hall 2, number 2F45.

Power Analog Microelectronics Inc.,

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