Cirrus Logic Offers Digital PA for Battery-Powered Devices
May 12, 2021
Blog
Research says that users are playing music, podcasts, movies, and gaming directly on their handsets, without the use of an external audio device.
To that end, Cirrus Logic has introduced its CS35L45 boosted amplifier for a richer audio experience from smartphones, tablets, and mobile gaming devices. The CS35L45 smart power amp offers high-peak loudness, improved dynamic range for more bass precision, less noise and audible artifacts, and more tonal balance at all volume levels.
The CS35L45 15-V smart boosted Class D audio amplifier with DSP can be easily integrated into a stereo or multi-speaker playback solution for next-generation high-end mobile devices, as well as improve performance in mid-tier devices without having to upgrade the device’s speakers. Among its features are speaker protection and adaptive battery management that drive higher output power in all battery conditions.
The smart power amp features 7-W output power capability and 15-V overboost to enable higher peak power at all frequencies, resulting in more tonal balance at all volume levels, better dynamics, and more spatial range and timbre. Because it can draw high levels of current from the battery, the CS35L45 is “system aware” with built-in battery current and voltage monitoring that delivers high output power but only when required to reproduce the source audio content. The CS35L45 amp’s proprietary adaptive battery management technology helps to “look ahead” to sudden audio signal spikes in order to protect the battery, prevent pumping and clipping, and maximize the audio performance at all volume levels, with no audible artifacts.
The Y-bridge output driver on CS35L45 allows for higher efficiency in receiver and speaker modes for longer battery life. Next-generation, more accurate speaker protection algorithms push speakers to their maximum limits while keeping them within safe limits. On-chip DSP firmware features include equalization and psychoacoustic enhancements that maximize performance from small speakers. The result is top acoustic performance for stereo smartphones that approaches the loudness and sound quality of portable speakers, without sacrificing battery power.
The device is shipping in production volumes in a commercial-grade 0.4-mm pitch, 36-ball wafer-level chip scale package for operation from -40°C to +85°C.
Rich Nass is a regular contributor to Embedded Computing Design. He has appeared on more than 500 episodes of the popular Embedded Executive podcast series, and is a regular contributor to the Embedded Insiders podcast.
Rich has been in the engineering OEM industry for more than 35 years, and is a recognized expert in the areas of embedded computing, Edge AI, industrial computing, the IoT, and cyber-resiliency and safety and security issues. He writes and speaks regularly on these topics and more.
Rich is currently the Liaison to Industry for the Embedded World North America Exhibition and Conference, and has held similar positions with the global Embedded World Conference and Exhibition.
Previously, Rich was the Brand Director for UBM’s award-winning Design News property. Prior to that, he led the content team for UBM Canon’s Medical Devices Group, as well all custom properties and events. In prior stints, he led the Content Team at EE Times, handling the Embedded and Custom groups and the TechOnline DesignLine network of design engineering web sites.
Nass holds a BSEE degree from the New Jersey Institute of Technology.
Podcast/Interview Coverage
IEEE Awards Frede Blaabjerg Talks EVS
Atmosic: Embedded Executive: Energy Harvesting Podcast
Article Coverage
Embedded AI Isn’t Enterprise AI, and That’s a Good Thing
Tear Down: Google Pixel Watch 4
Protect Your Home from Thieves and Floods
Advantech Teams With AMD To Maximize Performance at the Edge
View additional information
