News: Press Release: November 23, 2009

iWatt, Inc. Introduces Primary Side Regulated Digital PWM Controller for Dimmable LED Lighting

AC/DC LED driver IC works seamlessly with wall dimmers for optimum performance and is compatible with existing wall dimmers

Los Gatos, CA – Nov 23, 2009 - iWatt, Inc., a leader in digital power IC systems products and technology, today announced the release of the iW3610 Digital Controller for dimmable LED lighting applications. It is the industry’s first digital LED driver IC with primary side regulation which eliminates the need for an opto-coupler thereby reducing bill-of-material costs, and increasing the mean time between failure (MTBF). The iW3610 eliminates flicker and improves efficiency and reliability for dimmable LED lights of 25W or lower wattage.

The iW3610 uses advanced digital control technology to automatically detect and operate seamlessly with a leading edge or a trailing edge dimmer or if no dimmer is present. In case of an un-supported dimmer, the device shuts down and goes into a fail-safe mode. The device is compatible with existing wall dimmers available worldwide and allows parallel lamp operation for true retrofit replacement of incandescent bulbs, halogen lamps and linear fluorescent tubes.

The iW3610 operates in quasi-resonant mode and employs adaptive gate drive control and iWatt’s proprietary EZ EMI technology to achieve high efficiency and a low EMI signature. Depending on the application, efficiencies greater than 80% and power factor greater than 0.9 are easily achievable. The iW3610’s maximum operating frequency of 200kHz enables LED designers to use smaller size components to design driver boards that are small enough to fit inside existing bulb and lamp housing or inside fluorescent tubes. In addition to the standard protection features, the iW3610 also provides over-temperature protection using an external NTC resistor for robust protection. Moreover, the IC provides temperature drift control of the LED driver current to ensure that the LEDs will never operate outside of their recommended safe operating area.

iWatt also announced that Everlight, a leader in LED lighting products in Taiwan has chosen the iW3610 for their products’ lighting applications.
“We evaluated several ICs for our LED dimming products and iW3610’s advantages included the lowest BOM cost, one of the best performances and it worked with all of the dimmers we tested. It will be difficult to find another competitor that can match the iW3610 so for Everlight it was a very simple decision to select iWatt, “said Allen Lee, Director of the Lighting Business Unit from Everlight.

“Thanks to digital control technology, we are able to move the LED lighting industry one step closer to meeting the consumer’s desire for true retrofit lamp replacements that save energy, work with existing dimmers all for a competitive price. The iW3610 dimmable LED driver gives systems design engineers the technology and tools to improve reliability, reduce heat loss and fit the LED driver board into the most space constrained lamp housing while driving down the bill-of-material cost, “said Zahid Rahim, Vice President and General Manager of iWatt’s AC/DC Business Unit.

Key features of the iW3610 include:

Isolated AC/DC offline 110V / 230V ( required by many LED lamp OEMS )
External power MOSFET drive allows scaleable 5W to 25W output power
Primary-side regulation eliminates opto-isolator and improves reliability
Intelligent wall dimmer detection
Wide dimming range from 2% to 100%
Less than 5% constant current regulation over line, load and temperatureallows uniform LED brightness and flicker free operation
Quasi-resonant and proprietary multi-mode operation allows over 85% efficiency without dimmer; reduces the size, weight and cost of heat sink
Power factor over 0.9 without dimmer
LED current de-rating at high temperatures protects LEDs
Thermally enhanced SO-8 package with exposed pad allows high ambient temperature operation at 110 oC PCB temperature
Up to 200kHz switching frequency allows small size design
Multiple protection features: LED open/short circuit protection, input under-voltage/over-voltage protection and over-temperature thermal shutdown
Meets or exceeds EN55015B, IEC61000-3-2 regulatory standards with sufficient margin

Samples of the iW3610 are currently available. Pricing is $0.98 per 1,000 unit quantity. Contact sales@iwatt.com for additional information.
About iWatt, Inc.

iWatt, Inc. is a power control IC and power systems company that designs, develops and markets semiconductor and power system products for the computer, communication, consumer and industrial market segments. The Company's patented digital control and power system architecture expertise raises the bar in power supply price/performance metrics. iWatt is currently working with market leaders in the computing, telecom, networking, flat panel display and portable device markets to develop high density, high value AC-DC and DC-DC power supplies. iWatt is backed by VantagePoint Venture Partners, a leading CleanTech investor, and Sigma Partners. The Company’s Silicon Valley headquarters are located in Los Gatos, CA with additional offices in Fort Collins, CO, Taipei, Taiwan, Seoul, Korea, Tokyo, Japan, Shenzhen, China, and Hong Kong. For more information, visit www.iwatt.com or call iWatt at (408) 374-4200.

Media Contact
Sal Sestito
(408) 628-6510
ssestito@iwatt.com

About Everlight Electronics

Everlight Electronics Co. Ltd is a leader in the design of LEDs, Displays, Infrared and Optocoupler components serving various applications in the consumer, computing, automotive, telecommunication and industrial market segments. Everlight's exponential growth is the combined result of its well-engineered products, highly efficient in-house manufacturing facilities and extensive global supply chain.Founded in 1983, Everlight is headquartered in Taipei, Taiwan, with operations in Asia, America and Europe.

More information about Everlight: www.everlight.com

Press contact Information:
Marcom Dept.
+886 2 2267-2000
pr@everlight.com

News: Press Release: November 23, 2009

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