NCL30083

NCL30083 Dimmable Quasi-Resonant Primary Side Current-Mode Controller for LED Lighting with Thermal Fold-back The NCL30083 is a PWM current mode controller targeting isolated www.onsemi.com flyback and non−isolated constant current topologies. The controller operates in a quasi−resonant mode to provide high efficiency. Thanks 8 8 to a novel control method, the device is able to precisely regulate a constant LED current from the primary side. This removes the need for secondary side feedback circuitry, biasing and an optocoupler. 1 Micro8 DM SUFFIX 1 SOIC−8 D SUFFIX The device is highly integrated with a minimum number of external CASE 846A CASE 751 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. It supports step dimming by monitoring the AC line and detecting when the line has been toggled on−off−on by the user to MARKING DIAGRAM 8 reduce the light intensity in 5 steps down to 5% dimming. AAx Features Quasi−resonant Peak Current−mode Control Operation Primary Side Sensing (no optocoupler needed) Wide VCC Range Source 300 mA/Sink 500 mA Totem Pole Driver with 12 V Gate Clamp Precise LED Constant Current Regulation ±1% Typical Line Feed−forward for Enhanced Regulation Accuracy Low LED Current Ripple AYWG G 1 AAx = Specific Device Code x = E or F A = Assembly Location Y = Year W = Work Week G = Pb−Free Package (Note: Microdot may...