Cirrus Logic Single-Stage LED Driver Delivers Highest Levels of Dimmer Compatibility

  Cirrus Logic Single-Stage LED Driver Delivers Highest Levels of Dimmer

     CS1615/16 Family Recreates Dimming Performance Consumers Expect from
          Incandescent Light Bulbs, Offers Lower System Cost to OEMs

Business Wire

AUSTIN, Texas -- April 23, 2013

Following its entry into the LED retrofit market in 2012 with a line of
dual-stage LED drivers, Cirrus Logic, Inc. (Nasdaq: CRUS) has introduced its
first family of single-stage LED drivers, the CS1615/16, targeting the
incandescent lamp replacement market. Through patented technology, the
CS1615/16 consistently outperforms competing single-stage LED drivers in
dimmer compatibility while offering a total bill-of-material cost equal to
competing solutions.

The CS1615/16 LED drivers from Cirrus Logic. (Photo: Business Wire)

The CS1615/16 LED drivers from Cirrus Logic. (Photo: Business Wire)

Across a broad range of dimmers, the CS1615/16 consistently dims to nearly
zero light output, which closely matches the dimming performance of
incandescent light bulbs. Competing LED drivers are not capable of this level
of deep dimming and in many cases cannot dim to below 50 percent of light
output. Limited dimming range, flicker effects and the inability to turn the
bulb on or off are the most common factors that lead to high rates of return
of LED bulbs.

“The CS1615/16 family continues our strategy of offering best-in-class dimmer
compatibility while driving down system costs,” said Tom Stein, vice president
and general manager of the Energy Division. “This focus on performance and
user experience will be a key driver to broad consumer adoption of LED

Market research firm Datapoint Research estimates that the LED retrofit market
is expected to grow from 248.5 million units in 2012 to more than 1.9 billion
units by 2016.

To test dimmer compatibility, Cirrus Logic developed a testing methodology
that scores LED bulbs on multiple factors including flicker-free operation
(bulb does not flicker at any point along the full dimming range), smooth
“monotonic” dimming (bulb dims steadily without sudden “jumps” or drops in
light levels) and full dimming range operation (bulb dims effectively from
maximum to very low light output). Cirrus Logic acquired more than 300 dimmers
consisting of some of the most popular models on the market today and
representing much of the global installed base. In these tests, the CS1615/16
outperformed its competitors in both single- and multi-lamp configurations.

Digital control is the key to performance

Most dimmers are designed for operation with the purely resistive load of an
incandescent; however, the additional electronics in an LED bulb create
significant compatibility challenges. Cirrus Logic’s patented
dimmer-compatibility technology identifies the type of dimmer in use and
applies the appropriate operating mode. This adaptive digital technology
consistently provides full functionality on even the most challenging leading
edge, trailing edge and “smart” digital dimmers. Cirrus Logic’s LED drivers
enable next-generation bulbs to meet proposed standards from Energy Star,
NEMA, California Energy Commission and other standards groups that are
pursuing newer, more stringent requirements for dimmer compatibility.

The CS1615/16 provides primary-side constant current control and tight LED
current regulation, high efficiency, active power factor correction and low
THD. These ICs support isolated and non-isolated topologies with minimal EMI
filter design requirements. Additional features include output open circuit
protection, output short circuit protection and optional external over
temperature protection using an NTC. The CS1615 is designed for 120VAC line
voltage applications, and the CS1616 is designed for 230VAC line voltage

Pricing and Availability

The CS1615/16 is currently sampling to key customers and is expected to be in
volume production in early summer of 2013. It is available in 16-pin SOIC and
16-pin TSSOP packages, and is priced at $0.88 (USD) in quantities of 100,000.

Cirrus Logic, Inc.

Cirrus Logic develops high-precision, analog and mixed-signal integrated
circuits for a broad range of innovative customers. Building on its diverse
analog and signal-processing patent portfolio, Cirrus Logic delivers highly
optimized products for a variety of audio and energy-related applications. The
company operates from headquarters in Austin, Texas, with offices in Europe,
Japan and Asia. More information about Cirrus Logic is available at

Cirrus Logic and Cirrus are trademarks of Cirrus Logic, Inc. All other product
names noted herein may be trademarks of their respective holders.

Safe Harbor Statement

Except for historical information contained herein, the matters set forth in
this news release contain forward-looking statements, including our
expectations for volume production in early summer 2013. In some cases,
forward-looking statements are identified by words such as "expect,"
"anticipate," "target," "project," "believe," "goals," "opportunity,"
"estimates," "intend," and variations of these types of words and similar
expressions. In addition, any statements that refer to our plans,
expectations, strategies or other characterizations of future events or
circumstances are forward-looking statements. These forward-looking statements
are based on our current expectations, estimates and assumptions and are
subject to certain risks and uncertainties that could cause actual results to
differ materially. These risks and uncertainties include, but are not limited
to, failure of our new products to gain market acceptance; failure of the LED
lamp market to grow as anticipated; and the risk factors listed in our Form
10-K for the year ended March 30, 2012, and in our other filings with the
Securities and Exchange Commission, which are available at The
foregoing forward-looking statements represent our outlook as of the date of
this news release, and we undertake no obligation to update or revise these
statements, whether as a result of new developments or otherwise.

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Cirrus Logic, Inc.
Bill Schnell, 512-851-4084
Public Relations
Strategic Communications, Inc.
Angie Hatfield, 425-941-2895
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