UBA2070T

600V CCFL ballast driver IC

GENERAL DESCRIPTION

The UBA2070 is a high voltage integrated circuit for driving electronically ballasted Cold Cathode Fluorescent Lamps CCFL at mains voltages up to 277 V RMS nominal value. The circuit is made in a 650 V Bipolar CMOS DMOS BCD power logic process. The UBA2070 provides the drive function for the two discrete MOSFETs.

Besides the drive function the UBA2070 also includes the level-shift circuit, the oscillator function, a lamp voltage monitor, a current control function, a timer function and protections.

FEATURES

• Current controlled operation

• Adaptive non-overlap time control

• Integrated high voltage level shift function

• Power-down function

• Protected against lamp failures or lamp removal

• Capacitive mode protection.

APPLICATION

• The circuit topology enables a broad range of backlight inverters.