Single-stage PFC flyback controller for constant voltage output This single-stage flyback controller for constant voltage output is suitable for primary- and secondary-side regulation and allows for cost-optimized designs with exceptional PFC and THD performance. It comes with integrated burst mode and jitter function that enables stand-by power of <100 mW. Thanks to the built-in jitter function, the EMI certification process for smart and emergency lighting designs requires no additional circuitry.