OB3309
High Integrated U-Type CCFL Backlight Driver


OB3309 is a high integrated and high performance U-type Cold Cathode Fluorescent Lamp (CCFL) controller optimized for LCD monitor backlight application. Comprehensive protection functions are integrated, thus it provides a low-cost and high reliability LCD backlight solution with minimum system BOM count. OB3309 controls push pull topology and supports various dimming functions.


Features:

Minimal required external components
Push pull topology
High precision reference and frequency control
External programmability of the key parameters
Flexible Dimming mode Control:
Selective dimming polarity
Analog, internal burst and external burst (LPWM) dimming control
0-2V DC voltage or external PWM direct dimming control without external circuits
Dimming range programmable (100%~0%)
Comprehensive protection coverage:
Output over voltage protection (OVP)
Output over current protection (OCP)
Open lamp protection and short lamp protection
Arcing protection
Available in SOP16 package, RoHS compliant



Applications:

LCD CCFL backlight system in
LCD Monitor/TV


Typical Application: