NCL37733 Datasheet (ON Semiconductor) - LED Lighting Controller

NCL37733, LED Lighting Controller

Pin # Pin Name Function Pin Description 1 CS/ZCD Current Sense and Zero This multi *function pin is designed to monitor the primary peak current for protection Current Detection and output current control and the auxiliary winding voltage for zero current detection 2 GND Controller g

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

NCL37733 Features

* Quasi

* resonant Peak Current

* mode Control Operation

* Constant Current Control with Primary Side Feedback

* Tight LED Constant Current Regulation of ±2% typical

* Near

* Unity Power Factor (>0.95 typically)

* Optimized for Line Wide