NCL30086BH: Analog/Digital Dimmable Power Factor Corrected Quasi-Resonant Primary Side Current-Mode Controller for LED Lighting

The NCL30086BH 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 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 SOIC10 which has the same body size as a standard SOIC8, the NCL30086BH is specifically intended for very compact space−efficient designs. The device is highly integrated 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 analog and PWM dimming with a dedicated dimming input intended to control the average LED current. Pin−to−pin compatible to the NCL30086, the NCL30086BH provides the same benefits with in addition, an increased resolution of the digital current−control algorithm for a 75% reduction in the LED current quantization ripple.