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O2Micro Extends Free Dimming(TM) Technology for the Global LED Retrofit Lighting Market With Two-Step Nightlight Driver

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GEORGE TOWN, Grand Cayman, April 15, 2013 (GLOBE NEWSWIRE) -- O2Micro® International Limited (Nasdaq:OIIM), a global leader in the design, development and marketing of high-performance integrated circuits and solutions, today extended the Company's Free Dimming technology and General Lighting product portfolio with the introduction of the OZ2082 LED Driver Controller. It features two-level toggle dimming, ultra-low nightlight dimming level and Power Factor Correction (PFC).

O2Micro's patented Free Dimming technology enables LED bulbs to dim using any on/off switch, thus eliminating cost, installation and compatibility issues associated with traditional incandescent dimmers. Free Dimming technology works with any on/off switch, including wall toggles, paddle switches, pull cords, rotary switches and other types of on/off switches commonly found on walls, extension cords and table/desk lamps.

According to the National Electrical Manufacturers Association (NEMA), there are over 4.4 billion medium, screw-based light sockets in the U.S. Yet, according to industry estimates, there are only 150 million incandescent dimmers representing an enormous, untapped market opportunity for O2Micro's Free Dimming technology, which is inherently simple and works with any non-dimming on/off switch.

About the OZ2082 LED Driver Controller

Similar to O2Micro's broad family of Free Dimming LED driver controllers, the OZ2082 LED Driver Controller provides analog step dimming using any ordinary non-dimming on/off switch. The OZ2082's key feature is an ultra-low nightlight dimming level. When turned on, a LED bulb based on the OZ2082, achieves full brightness instantly. A simple flick of the wall switch dims the bulb to a deep nightlight level of approximately 0.3% of the full brightness level. The full brightness and nightlight levels are easily adjustable with a resistor.

The OZ2082 is a highly optimized controller for non-isolated buck converter applications. The device features the highest level of integration, reducing the system level driver bill of material (BOM) cost and component count to industry-leading levels. The built-in high voltage start-up circuit provides fast start-up operation, eliminates the power loss caused by start-up resistors used in conventional AC/DC converter applications and further reduces the BOM count.

The OZ2082 supports universal 85V to 265V operation, enabling one LED bulb to address the global marketplace. Integrated power factor correction enables high power factor and low Total Harmonic Distortion (THD) over a wide input voltage range to meet both residential and commercial requirements, further helping OEMs meet global regulatory requirements.

High efficiency greater than 88% reduces energy consumption and thermal management complexity. Integrated over-temperature, over-voltage, cycle-by-cycle current limiting, LED open circuit and LED short circuit protection and maximum gate drive output clamp provide safe and reliable operation. Excellent LED current regulation ensures consistent lumen output, regardless of varying line input conditions.

Product Availability and Additional Information

The OZ2082 is available in a cost effective 8-pin SOP package and is in high volume production now. Samples and evaluation boards are available now for qualified customers.

For additional information, contact O2Micro sales representatives via our website at www.o2micro.com.

About O2Micro

Founded in April 1995, O2Micro develops and markets innovative power management components for the Computer, Consumer, Industrial, Automotive and Communications markets. Products include LED General Lighting, Backlighting, Battery Management and Power Management.

O2Micro International maintains an extensive portfolio of intellectual property with 22,390 patent claims granted, and over 24,000 more pending. The company maintains offices worldwide. Additional company and product information can be found on the company website at www.o2micro.com.

O2Micro, the O2Micro logo, and combinations thereof are registered trademarks of O2Micro. Free Dimming and combinations thereof are trademarks of O2Micro. All other trademarks or registered trademarks are the property of their respective owners.

Statements made in this release that are not historical, including statements regarding O2Micro's or management's intentions, hopes, beliefs, expectations, representations, projections, plans or predictions of the future, are forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Such statements involve risks and uncertainties that may cause actual results to differ materially from those set forth in these statements. Factors that could cause actual results to differ materially include risks and uncertainties such as reduced demand for products of electronic equipment manufacturers which include O2Micro's products due to adverse economic conditions in general or specifically affecting O2Micro's markets, technical difficulties and delays in the developments process, and errors in the products. You are also referred to the Form F-1 in connection with the company's initial public offering in August 2000, Form F-3 in connection with the company's public offering in November 2001, and the annual reports on Form 20-F, which identify important risk factors that could cause actual results to differ from those contained in the forward-looking statements. The company assumes no obligation to update or revise any forward-looking information, whether as a result of new information, future events or otherwise.

CONTACT: Scott L. Anderson Director of Investor Relations, O2Micro Phone: 408.987.5920, x8888 Email: scott.anderson@o2micro.com

Source:O2Micro International Limited