NEWS RELEASE
–more–
Power Integrations’ New Power Supply Reference Design Enables 10 mW
No-load Consumption, Targets European Ecodesign Standby Specifications
LinkSwitch
-XT Design Meets the Needs of Efficiency-Conscious Producers of LCD Monitors,
LCD-TVs, Appliances, and External Adapters
SAN JOSE, CALIF. – July 16, 2009 – Power Integrations (Nasdaq: POWI), the leader in high-
voltage integrated circuits for energy-efficient power conversion, today released a new Design
Engineering Report (DER-227
) which details the design of a 3-watt power supply circuit that
consumes just 10 mW during no-load operation. T his mi nuscule power cons umption within th e power
supply leaves much more power available for use by electronic systems designed to comply with the
standby power limits mandated by regulations such as the European Union’s Ecodesign Directive
for
Energy-Using Products (EuP).
The EuP standard will limit standby power consumption to 500 mW, and many eco-minded
manufacturers of consumer products and appliances are choosing even lower standby power budgets
of 100 mW, 50 mW, or even 30 mW. A standby power supply that consumes only 10 mW at zero
load allows a greater margin for other leaky circuit components, such as input filters, capacitors, and
bias components, while still providing the power required to support valuable system standby
activities. These include functions such as powering circuits to monitor an infrared remote control in
consumer entertainment equipment, as well as hardware to sense a key-press to activate appliances or
send automated wake-up signals such as those provided to an LCD monitor by a PC.
The power circuit described in DER-227
is based on Power Integrations’ LNK363DN, a member of
the LinkSwitch-XT
offline switcher IC family in an SO-8 package. This 3-watt, single-output, isolated
power supply operates from a universal 85 to 2 65 VAC input, delivering 5 V at up to 0.6 A. It meets
EN55022B/CISPR22B limits without the need for a Y capacitor, and meets the efficiency
requirements of the European EuP Ecodesign Directive and ENERGY STAR
EPS v 2.0.
Comments Andrew Smith, product marketing manager at Power Integrations: “Consumers are
increasingly interested in green products. In response, equipment manufacturers are developing
products that use energy more e fficiently and the market is moving rapidly towards exceptionally low
power use, particularly in standby mode. Our EcoSmart
technology meets this need by drastically
reducing power consumption in no-load and light-load conditions.”
Power Integratio ns’ New Power Supply Reference Desig n Enables 10 mW No-Load Consumptio n,
Targets European Ecodesi gn St a ndby S pecif icat ions
Page 2
Smith continues: “The power supply described in DER-227 also features careful transformer design
and circuit bias component selection, combined with algorithms that switch only when required to
maintain output voltage regulation, facilitating extremely low power consumption. This allows the
supply to deliver power to the system immediately when it turns on, while consuming very little
power itself.”
DER-227
is available now for download at www.powerint.com/PDFFiles/der227.pdf.
References
1. 3 W Single Output, <10 mW No-Load Consumption Isolated Adapter Using LinkSwitch-XT,
DER-227, Power Integrations (July 2009). www.powerint.com/PDFFiles/der227.pdf
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 $3.5 billion of
standby energy waste and prevented millions of tons of CO
2
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 inform ation, please vi sit http://www.powerint.com
.
# # #
Media Contact
Peter Rogerson
Power Integrations, Inc.
(408) 414-8573
progerson@powerint.com
Press Agency Contact
Nick Foot
Billings Europe PR Agency
+44 (0) 1491-636 393
nick.foot@billings-europe.com