O2Micro International has introduced the OZ8027A LED Driver Controller, which makes use of Free Dimming technology, as part of its lighting product range. A commonly used non-dimming on/off switch can be used for dimming this LED Driver Controller by a three-step process.
O2Micro’s Free Dimming technology helps in dimming LED bulbs using a common on/off switch, which in turn helps to reduce cost, and also problems associated with compatibility and installation of LED bulbs.
The OZ8027A LED Driver Controller makes use of primary-side regulation to reduce the BOM-count which in turn eliminates the need for using an optocoupler of high cost. With an energy efficiency of more than 85%, the OZ8027A decreases the complexity associated with thermal management and also decreases energy consumption. This LED Driver Controller operates in the voltage range of 85 V–265 V, which gives it a global appeal. The power factor correction feature in the OZ8027A helps it to achieve a high power factor over a low THD and a broad input voltage range.
The reduction in BOM count is further accelerated due to the high voltage startup circuit that is built in with the OZ8027A LED Driver Controller. This feature also contributes to the quick startup operation of the OZ8027A. The regulation of LED current is highly efficient in this LED Driver Controller, which ensures consistency in lumen output, irrespective of the variations in the line input conditions. Isolated flyback topology is a unique feature of the OZ8027A, which enables the device to support the requirements of UL regulations. Integrated LED short circuit, LED open circuit, cycle-by-cycle current limiting, over-voltage, and over-temperature protection enable the reliable and safe operation of the OZ8027A LED Driver Controller.
Source: http://www.o2micro.com/