OB3309

On-Bright Confidential to IVT OB3309 Highly Integrated U Type CCFL Backlight Controller Product Specification GENERAL DESCRIPTION OB3309 is a highly integrated and high performance U-type Cold Cathode Fluorescent Lamp (CCFL) controller optimized for LCD display backlight application. Comprehensive protection functions are integrated, thus it provides a cost effective yet high reliability LCD backlight solution. Operating in push pull configuration, OB3309 converts DC input voltage to the pure sinusoidal voltage and current waveforms, to ignite and operate CCFL lamps. It provides a high degree of design flexibility by offering great programmability for key parameters which include operating frequency, striking frequency, striking time, dimming polarity, burst dimming frequency, soft-start time, and soft on/off time for burst dimming. Various dimming modes control and dimming polarity programmability are offered. Both internal burst and external low frequency PWM (LPWM) dimming methods...