OB3309 PDF Datasheet
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Description
This is Highly Integrated U Type CCFL Backlight Controller. 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 method.