O2Micro introduces 3-way LED bulb driver controller with power factor correction

O2Micro(R) International Limited today introduced the patent pending OZ2083 3-Way LED Bulb Driver Controller with Power Factor Correction.

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Three-way desk, table and floor lamps are ubiquitous in the United States, providing consumers with the convenience of high, medium and low brightness in a single bulb. However, today’s 3-way lamps are based on energy inefficient incandescent bulbs. Furthermore, the filaments in 3-way incandescent bulbs burn out at different rates, creating reliability problems and a poor consumer experience.

LED-based, 3-way bulbs provide significant efficiency improvements versus their incandescent counterparts. In addition, they provide much longer operating life, eliminating the reliability problems that plague 3-way incandescent bulbs. But until now, there has been no easy and cost effective way to design the complex driver circuitry required for a 3-way LED bulb. O2Micro’s OZ2083 solves this problem.

The OZ2083 3-Way LED Bulb Driver Controller with Power Factor Correction is a Buck converter controller utilizing quasi-resonant technology. The device provides two detection inputs based on proprietary technology to support 3-way, 2-circuit sockets used within 3-way desk, table, and floor lamps to produce three levels of LED brightness in a low-medium-high configuration. Using the OZ2083, manufacturers can easily and rapidly develop drop-in LED bulb replacements for today’s 3-way incandescent bulbs.

The OZ2083 is a highly optimized controller for non-isolated Buck converter off-line 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. An external MOSFET provides the flexibility to support a range of application requirements.

The OZ2083 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.



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