O2Micro Extends Free Dimming(TM) Technology for the Global LED Lighting Market With BOM Optimized Step-Dimming Driver

O2Micro Extends Free Dimming(TM) Technology for the Global LED Lighting Market
With BOM Optimized Step-Dimming Driver

OZ8022T LED Driver Features 3-Level Toggle Dimming and Power Factor Correction
With Highest Level of Integration to Provide Lowest System BOM Count and Cost

GEORGE TOWN, Grand Cayman, Jan. 16, 2013 (GLOBE NEWSWIRE) -- O[2]Micro^®
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 Lighting
product portfolio with the introduction of the OZ8022T LED Driver Controller
with 3-level toggle dimming and Power Factor Correction (PFC).

O[2]Micro'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 O[2]Micro's
Free Dimming technology, which is inherently simple and works with any
non-dimming on/off switch.

About the OZ8022T LED Driver Controller

Similar to O[2]Micro's OZ8022A, OZ8022B and OZ8022M Free Dimming LED driver
controllers, the OZ8022T LED Driver Controller provides three-step analog
dimming using any ordinary non-dimming on/off switch and supports non-isolated
applications. In addition, the OZ8022T integrates PFC, achieving high power
factor and very low THD over a wide input voltage range to meet both
residential and commercial regulatory requirements.

The OZ8022T is a highly optimized quasi-resonant 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
count to industry leading levels. The built-in high voltage start-up circuit
provides fast start-up operation and further reduces the BOM count.

The OZ8022T supports universal 85V to 265V operation, enabling one LED bulb to
address the global marketplace. High efficiency greater than 85% 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 OZ8022T is available in cost effective 8-pin SOP or 16-pin QFN packages
and is in high volume production now. Samples and evaluation boards are
available now for qualified customers.

For additional information, contact O[2]Micro sales representatives via our
website at www.o2micro.com.

About O[2]Micro

Founded in April 1995, O[2]Micro develops and markets innovative power
management and e-commerce components for the Computer, Consumer, Industrial,
and Communications markets. Products include Intelligent Lighting, Battery
Management, and Power Management.

O[2]Micro International maintains an extensive portfolio of intellectual
property with 21,475 patent claims granted, and over 22,000 more pending. The
company maintains offices worldwide. Additional company and product
information can be found on the company website at www.o2micro.com.

O[2]Micro, the O[2]Micro logo, and combinations thereof are registered
trademarks of O[2]Micro. Free Dimming and combinations thereof are trademarks
of O[2]Micro. All other trademarks or registered trademarks are the property
of their respective owners.

The O2Micro International Limited logo is available at
http://www.globenewswire.com/newsroom/prs/?pkgid=6567

Statements made in this release that are not historical, including statements
regarding O[2]Micro'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 O[2]Micro's
products due to adverse economic conditions in general or specifically
affecting O[2]Micro'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

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