NCL30185

NCL30185 Power Factor Corrected Quasi-Resonant Primary Side Current-Mode Controller for LED Lighting with Line Step Dimming and www.onsemi.com Thermal Foldback The NCL30185 is a controller targeting isolated and non−isolated “smart−dimmable” constant−current LED drivers. Designed to support flyback, buck−boost, and SEPIC topologies, its proprietary current−control algorithm provides near−unity power factor and 8 1 SOIC−8 NB CASE 751 tightly regulates a constant LED current from the primary side, thus eliminating the need for a secondary−side feedback circuitry or an optocoupler. Housed in the SOIC8, the NCL30185 is specifically intended for very compact space−efficient designs. The device is highly integrated MARKING DIAGRAM 8 L30185x ALYW G with a minimum number of external components. A robust suite of safety protections is built in to simplify the design. To ensure reliable operation at elevated temperatures, a user configurable current foldback circuit is also provided. In addition, it supports step dimming which allows light output reduction by toggling the main AC switch on and off. 1 L30185x = Specific Device Code x = A, B A = Assembly Location L = Wafer Lot Y = Year Pin−to−pin compatible to the NCL30085, the NCL30185 provides the same benefits with in addition, an increased resolution of the W = Work Week G = Pb-Free Package digital current−control algorithm for a 75% reduction in the LED current quantization ripple. Features PIN CONNECTIONS 1 ZCD ...