Supplied in 2 x 2 mm DFN package, XR46073 serves as 2-step LED current controller for AC step driving with optimized line regulation primarily for A19 LED bulb applications. TRIAC-dimmable IC integrates 2 steps of current control to LED strings, improving circuit line regulation by monitoring line voltage and adjusting LED drive current proportionally. Integrating overvoltage and over temperature protection, RoHS-compliant product offers system power regulation over ±10% AC input.