Click to expand full text
Power Factor Corrected Quasi-Resonant Primary Side Current-Mode Controller for LED Lighting Below 25 W
NCL37733
The NCL37733 is a compact driver for power−factor corrected flyback and non−isolated buck−boost and SEPIC converters. The controller operates in a quasi−resonant mode to provide optimal efficiency, and embeds a proprietary control method which allows the LED current to be tightly regulated from the primary side, thus eliminating the need for a secondary−side feedback circuitry and for an optocoupler.
Housed in a TSOP−6 package, the device is highly integrated with a minimum number of external components. A robust suite of safety protection is built in to simplify the design. This device is specifically intended for very compact space efficient designs.
NCL37733 Datasheet
