DESCRIPTION

The device is a monolithic high voltage integrated circuit designed to drive CFL and small TL lamps with a minimum part count.

It provides all the necessary functions for proper preheat, ignition and steady state operation of the lamp:

? variable frequency oscillator;

? settable preheating and ignition time;

? capacitive mode protection;

? lamp power independent from mains voltage variation.

Besides the control functions, the IC provides the level shift and drive function for two external power MOS FETs in a half-bridge topology.

■ BCD-OFF LINE TECHNOLOGY

■ FLOATING SUPPLY VOLTAGE UP TO 570V

■ GND REFERRED SUPPLY VOLTAGE UP TO 18V

■ UNDER VOLTAGE LOCK OUT

■ CLAMPING ON Vs

■ DRIVER CURRENT CAPABILITY:

30mA SOURCE

70mA SINK

■ PREHEAT AND FREQUENCY SHIFT TIMING