Enabling affordable fidelity for consumer audio, the Si270x stereo Class D amplifier family is offered as the first 5-W device of its kind that effectively mitigates EMI. For years, audio engineers have wanted to replace power-hungry Class A/B amplifiers with power-efficient Class D technology. Two issues stood in the way: the high EMI emissions inherent to traditional Class D solutions, which interfere with AM/FM radio and smart-phone operation, and the high cost of adding expensive filtering and shielding for EMI regulatory compliance.
The Si270x amplifier uses multilayer EMI mitigation technology to suppress traditional Class D interference at its source, enabling easier EMI compliance, AM/FM radio coexistence, and smart-phone compatibility in consumer audio products. Compared to existing Class D solutions, the Si270x amplifier reduces radiated interference by 10x in the EMI-compliance band, by 100x in the FM radio band, and by 1,000x across the AM band.
According to the company, this amplifier can enable a 2.5x increase in play time over Class A/B-based systems while using only half the number of batteries (four instead of a typical eight). Housing is in 24-pin QFN packages. (From $1.17 ea/10,000; Si270x-A-EVB evaluation board, $325 — available now.)
Silicon Laboratories , Austin , TX
512-416-8500
www.silabs.com
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