Power Integrations Achieves 92%-Efficient Power Supply for LED Streetlights up to 150 W

LED Design Simplified Using PI`s HiperPLC Controller IC and PI Expert Software
SAN JOSE, Calif.--(Business Wire)--
Power Integrations (Nasdaq:POWI), the leader in high-voltage integrated circuits
for energy-efficient power conversion, today released a new engineering report
(DER-212) describing a 92%-efficient power supply for LED streetlight
applications. The design utilizes Power Integrations` HiperPLC power supply
controller, which enables a simple, cost-effective circuit design by combining
power factor correction (PFC) and resonant (LLC) control functions on a single
integrated circuit. The new design will be showcased in the Power Integrations
booth at LED Expo Korea (Kintex, Korea; May 20-23) and LED Lighting Taiwan
(Taipei, Taiwan; June 10-12).

LEDs are rapidly emerging as the preferred streetlighting technology, displacing
traditional technologies such as high pressure sodium (HPS) lamps. LEDs consume
far less electricity for each lumen of useful light emitted, delivering as many
as 80 lumens per watt when driven by a high-efficiency resonant power supply,
versus just 58 lumens per watt for HPS lamps. In addition, LEDs provide better
directional control and color quality than HPS lights, an important
consideration in shopping and residential areas. LEDs can also turn on and off
instantly and retain their efficiency when dimmed - features well suited to
automated sensing of ambient light and human activity, allowing light output to
be optimized for cost, with minimal consequences to the community lighting
scheme. Maintenance costs, and therefore the total cost of ownership, are also
significantly reduced due to the intrinsically high reliability of LEDs compared
to HPS lamps.

HiperPLC, Power Integrations` first high-power product, is designed to control
AC-DC converters from 80 to 600 watts. HiperPLC minimizes costs by reducing the
size of the PFC magnetics required, and by combining the PFC and LLC controllers
into a single IC.The IC provides up to 0.99 power factor and features
synchronization of PFC and LLC controllers. Synchronization reduces the ripple
in the bulk capacitors, which reduces capacitor operating temperature and
significantly extends the life of the power supply. Support for HiperPLC is now
featured in Power Integrations` PI Expert software (version 7.1.4), an automated
power supply design tool based on PI products.

Comments Doug Bailey, Power Integrations` vice president of marketing:
"Municipalities around the world are finding that LEDs offer a greener, more
economical approach to streetlighting by saving both energy and maintenance
costs. However, these benefits cannot be fully realized without a highly
efficient, reliable power supply driving the LEDs. With HiperPLC, designers can
produce a simple, reliable, cost-effective, power supply with efficiency as high
as 92%."

DER-212 is available now for download at www.powerint.com/PDFFiles/der212.pdf.
For more information, visit the Power Integrations LED lighting microsite. Power
Integrations` PI Expert design software, with full support for HiperPLC, can be
downloaded at no cost from http://www.powerint.com/pi-expert.

References

1. DER-212:150 W Power Factor Corrected LLC Power Supply Using HiperPLC
(PLC810PG), Power Integrations (5/11/09). www.powerint.com/PDFFiles/der212.pdf

2. Power Integrations` LED Lighting
Microsite:www.powerint.com/applications/led-lighting

About Power Integrations

Power Integrations is the leading supplier of high-voltage analog integrated
circuits used in energy-efficient power conversion. The company`s innovative
technology enables compact, energy-efficient power supplies in a wide range of
electronic products, in AC-DC, DC-DC and LED lighting applications. Since its
introduction in 1998, Power Integrations` EcoSmart energy-efficiency technology
has saved an estimated $3.4 billion of standby energy waste and prevented
millions of tons of CO2 emissions. The company`s Green Room web site
(www.powerint.com/greenroom) provides a wealth of information about "energy
vampires" and the issue of standby energy waste, along with a comprehensive
guide to energy-efficiency standards around the world. Reflecting the
environmental benefits of EcoSmart technology, Power Integrations is included in
clean-technology stock indices sponsored by the Cleantech Group (Amex: CTIUS)
and Clean Edge (Nasdaq: CELS). For more information, please visit
http://www.powerint.com.

Power Integrations, Inc.
Peter Rogerson, 408-414-8573
progerson@powerint.com
or
Billings Europe PR Agency
Nick Foot, +44 (0) 1491-636 393
nick.foot@billings-europe.com

Copyright Business Wire 2009