New LED-Downlight Reference Design from Power Integrations Achieves High-Performance Dimming While Reducing Component Count
Power
Integrations (Nasdaq: POWI),
the world leader in high-efficiency, high-reliability LED driver ICs,
today announced RDR-347,
an LED-downlight reference design. The new circuit demonstrates the
capabilities of the recently launched LYTSwitch™
IC family, which offers the industry’s best high-end dimming performance
from a single-stage LED driver – together with all the associated
efficiency, space and cost benefits that the single-stage approach
brings.
The RDR-347
12 W reference design, based on the LYT4313E,
delivers a power factor greater than 0.95 and reduces total harmonic
distortion (THD) to less than 10% - easily meeting EN61000-3-2C
requirements. Efficiency is greater than 86% at 120 VAC –
industry-leading performance for an isolated solution capable of
operating with a wide range of dimmers. This performance is possible
because LYTSwitch
ICs use one combined PFC and CC power conversion stage which minimizes
losses and cuts component count, which in turn increases reliability and
decreases cost.
TRIAC dimming is challenging, especially deep-dimming where TRIAC
asymmetry between half-cycles can have a significant effect. RDR-347
shows that Power
Integrations’ LYTSwitch
driver IC works excellently, even at very low output currents, without
any shimmer or flicker. The design also demonstrates system start-up
without noticeable hysteresis (so-called “pop-on effect”), even in
deep-dimming. The IC features a very fast start-up time (under 500 ms)
even when dimmed to 10% output current, achieving the “instant-on”
condition that many customers want, but that many designs in the market
cannot provide.
Comments Andrew Smith, senior product marketing manager for Power
Integrations: “By using our LYTSwitch
driver, lighting engineers can achieve excellent dimming with minimal
efficiency loss.”
RDR-347
is available for download via the Power
Integrations website at http://www.powerint.com/sites/default/files/PDFFiles/rdr347.pdf
About Power Integrations
Power
Integrations, Inc., is a Silicon Valley-based supplier of
high-performance electronic components used in high-voltage
power-conversion systems. The company’s integrated circuits and diodes
enable compact, energy-efficient AC-DC power supplies for a vast range
of electronic products including mobile devices, TVs, PCs, appliances,
smart utility meters and LED lights. CONCEPT IGBT driver systems
enhance the efficiency, reliability and cost of high-power applications
such as industrial motor drives, solar and wind energy systems, electric
vehicles and high-voltage DC transmission. Since its introduction in
1998, Power Integrations’ EcoSmart® energy-efficiency
technology has prevented billions of dollars’ worth of energy waste and
millions of tons of carbon emissions. Reflecting the environmental
benefits of the company’s products, Power Integrations’ stock is
included in the NASDAQ® Clean Edge® Green Energy
Index, The Cleantech Index®, and the Ardour Global IndexSM.
For more information, including design-support tools and resources,
please visit www.powerint.com;
visit Power Integrations’ Green
Room for a comprehensive guide to energy-efficiency standards around
the world.
Power Integrations, LYTSwitch, and the Power Integrations logo are
trademarks or registered trademarks of Power Integrations, Inc. All
other trademarks are the property of their respective owners.