NCL30082

NCL30082 Dimmable Quasi-Resonant Primary Side Current-Mode Controller for LED Lighting with Thermal Fold-back The NCL30082 is a PWM current mode controller targeting isolated flyback and non−isolated constant current topologies. The controller operates in a quasi−resonant mode to provide high efficiency. Thanks 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. 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 supports analog/digital dimming as well as thermal current fold−back. While the NCL30082 has integrated fixed overvoltage protection, the designer has the flexibility to program a lower OVP level. 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 250 mV ±2% Guaranteed Voltage Reference for Current Regulation ~0.9 Power Factor with Valley Fill Input Stage Low Start−up Current (13 mA typ.) Analog or Digital Dimming Thermal Fold−back Wide Temperature Range of −40 to +125°C Pb−Free, Halide−Free MSL1 Product Robust Protection F...