Cirrus Logic Single-Stage LED Driver Delivers Highest Levels of Dimmer Compatibility
April 23 2013 - 9:00AM
Business Wire
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)
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
lighting.”
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 applications.
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 www.cirrus.com.
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
www.sec.gov. 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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