The L6567 is a monolithic high voltage integrated circuit designed by STMicroelectronics to drive CFL and small TL lamps with a minimum number of components. It provides all the necessary functions for proper preheating, ignition and steady state operation of the lamp, such as variable frequency oscillator, settable preheating and ignition time, capacitive mode protection, and lamp power independent from mains voltage variation. In addition to the control functions, the IC provides the level shift and drive function for two external power MOS FETs in a half-bridge topology.