Cirrus Logic Introduces Industry’s Smallest, Low-Power Boosted Smart Audio Amplifier to Support Global Shift to Mobile Stereo
February 19 2019 - 10:10AM
Business Wire
New Cirrus Logic CS35L41 Smart Power Amplifier
Features Enhanced Audio Clarity, Advanced Battery Management and
55nm Process Design for Enriched Speaker Listening Experience
Listening to music, streaming video and gaming on smartphones
just got better with a boost from Cirrus Logic’s (NASDAQ: CRUS)
latest boosted smart audio amplifier. The Cirrus Logic CS35L41
smart power amplifier is designed to support the growing trend
toward stereo audio in smartphones and portable devices. It
delivers enriched audio clarity and loudness with advanced power
management, all in a small package – nearly half the size of other
leading DSP smart amps. By tackling the complex engineering
challenges inherent in mobile stereo audio design, Cirrus Logic
enables OEMs of smartphone and battery-powered portable devices to
introduce a markedly improved audio listening experience for both
mono and stereo applications, while conserving battery life.
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Thanks to mobile stereo and smart power
amplifier technology from Cirrus Logic, consumers can put their
smartphones on speaker mode and use it as their primary device for
enjoying music from anywhere. (Photo: Business Wire)
The Cirrus Logic CS35L41 11-volt boosted Class D audio amplifier
with DSP, complemented with Cirrus Logic’s SoundClear® Playback
software, improves audio quality and increases the loudness of
smartphone speaker output while protecting the speaker using both
hardware and software techniques. Its advanced battery management
system and predictive algorithms adapt to changing audio, speaker
and battery conditions to minimize power consumption and battery
current, without sacrificing audio performance. This new smart
power amplifier also uses 55 nm process technology, the most
advanced for this class of amplifiers, resulting in a tiny, 5.64
mm2 space-saving WLCS package. This is important to OEMs who want
to include a two-speaker design, as well as pack in as many new
features and functions as possible.
According to a SAR Audio Signal Chain IC forecast database from
Q4 2018, market shipments for audio amplifiers have grown 3x from
2010 to 2018 due to the increasing shipments of audio playing
devices, and also the increasing number of channels per device.
“Amplifier shipment growth in the smart phone market is due not
only to an increase in stereo sound in high-end phones but also the
mid-tier market, defined as phones priced between $200 and $500,”
said SAR Insight principal analyst, Peter Cooney. “We anticipate
this growth to continue with an estimated increase from the 500
million amplifiers shipped into mid-tier phones in 2017, to almost
700 million by 2022.”
“More and more consumers are turning to their smartphone as a
primary device for video streaming, gaming and listening to music –
including using speakerphone or loudspeaker mode,” said Carl
Alberty, vice president of Marketing, Cirrus Logic. “The sound
quality from a phone using the CS35L41 is so impressive that you
can leave your portable speaker behind and simply carry one device
to enjoy media anywhere you go without compromise.”
The Cirrus Logic CS35L41 boosted amplifier delivers on the ‘big
three’ requirements for mobile applications: enriched audio sound,
efficient low-power management and a space-saving package. By
incorporating features such as advanced battery management and
predictive algorithms, the Cirrus Logic smart power amp increases
the audio volume when in speakerphone mode, while reducing noise
and power consumption, resulting in better battery life and
improved talk times.
Audio Performance, Low Power, Small Package
The Cirrus Logic CS35L41 11-volt smart boosted Class D audio
amplifier with DSP delivers high-performance audio in a small,
low-power package. Design features include:
- Amplifier Performance—The core
of the Cirrus Logic CS35L41 features a 5.3-watt digital input, mono
Class D amplifier with the lowest noise and idle power consumption
in its class. An integrated 11-volt Class H DC-DC converter boosts
the supply voltage and maintains higher efficiency than other audio
power amplifiers relying on Class G boost regulators. By adaptively
tracking the audio level, the Class H boost converter helps improve
system efficiency, minimizes power dissipation and preserves
battery life.
- Audio Enhancement—Cirrus Logic’s
SoundClear Playback software provides the ability to fine tune
audio to the specific micro speaker being used in the mobile
system. Equalization, compression and psychoacoustic enhancement
algorithms improve sound clarity and increase loudness. Playback
filtering compensates for the unique frequency response of the
speaker, while eliminating pre-ringing found in conventional linear
phase filters. This enables audio engineers to get the most out of
small speakers and improve the gaming and video streaming audio
experience for mobile device users.
- Battery Management—The Cirrus
Logic CS35L41 preserves battery life using an advanced battery
management system, in addition to its Class H boost and super low
6.7-milliwatt (mW) quiescent current. By predictively managing the
demand on the battery, the amplifier is able to maintain maximum
loudness and audio quality, while protecting the battery by
minimizing battery current draw and eliminating unexpected “brown
out” conditions that shut down the phone.
Availability
The Cirrus Logic CS35L41 smart power amplifier is currently
shipping in production volumes. The company also offers tuning
tools that help enable not only top-tier smartphone and portable
device OEMs to introduce higher quality mono and stereo audio, but
mid- and lower cost designs as well. More information on the Cirrus
Logic CS35L41 11-volt boosted Class D audio amplifier is available
at https://www.cirrus.com/products/cs35l41.
Cirrus Logic, Inc.
Cirrus Logic is a leader in high-performance,
low-power ICs for audio and voice signal processing applications.
Cirrus Logic’s products span the entire audio signal
chain, from capture to playback, providing
innovative products for the world’s top smartphones,
tablets, digital headsets, wearables and emerging smart home
applications. With headquarters in Austin, Texas, Cirrus Logic is
recognized globally for its award-winning corporate
culture. Check us out at www.cirrus.com.
Cirrus Logic, Cirrus, the Cirrus Logic logo design and
SoundClear are registered trademarks or trademarks of Cirrus Logic,
Inc. © 2019 Cirrus Logic, Inc. Other company names and/or brands
may be trademarks or service marks of their respective owners. ©
2019 Cirrus Logic, Inc. All rights reserved.
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Bill SchnellPublic RelationsCirrus Logic, Inc.(512)
851-4084bill.schnell@cirrus.com
Angie HatfieldStrategic Communications, Inc.(425)
941-2895ahatfield@strategiccom.biz
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