Why Smart Power Audio Amplifiers Are Becoming Important to Smartphones

It’s not unusual to see friends gathered around a sideways-turned phone to share the viewing and listening experience while watching videos on the phone’s external speakers. This trend toward stereo audio in smartphones, and other audio-playing devices, shows that audio amplifiers are playing a more important role in smartphone design. As a result, audio amplifiers are seeing a big jump in both unit volume and technology. This article was originally published in audioXpress, July 2019.

The massive growth in the voice assistant market has created a vibrant ecosystem and significant opportunities for hardware and software developers. Total voice software unit shipments are expected to increase significantly to 2024, according to SAR Insight & Consulting. The firm latest report forecasts a larger increase in voice software, especially within home devices such as smart speakers, soundbars, smart TVs and smart appliances.

To support the growing trend toward stereo audio in smartphones and portable devices, Cirrus Logic announced the new Cirrus Logic CS35L41 boosted smart power amplifier, based on 55nm process design. The new Class D amp delivers on the “big three” OEM requirements for mobile applications: enriched audio sound, efficient low-power management and a space-saving package. Featuring predictive algorithms, the power amp increases the audio volume when in speakerphone mode, while reducing noise and power consumption.