O2Micro, a supplier of industry-leading product line of power management and e-commerce ICs, has expanded its Free DimmingTM technology and Lighting product portfolio with the launch of new isolated step-dimming driver OZ8027A.
 
Similar to O2Micro's OZ8022A, OZ8022B and OZ8022M Free Dimming LED driver controllers, the OZ8027A LED Driver Controller provides three-step dimming using any ordinary non-dimming on/off switch. However, while the OZ8022 product family supports non-isolated applications, the OZ8027A features an isolated flyback topology to help support UL regulatory requirements.
 
The OZ8027A features low BOM-count and uses primary-side regulation to eliminate the need for an expensive optocoupler. The OZ8027A also features power factor correction, achieving high power factor over a wide input voltage range and very low THD to meet various regulatory requirements. The built-in high voltage startup circuit provides fast startup operation and reduces the BOM count. The device is also compatible with neon indicators commonly found in wall switches.
 
The OZ8027A 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 provides safe and reliable operation. Excellent LED current regulation ensures consistent lumen output, regardless of varying line input conditions.