OB3318 pdf datasheet

OB3318 is a high performance Cold Cathode
Fluorescent Lamp (CCFL) backlight controller IC
dedicated for use in half bridge configuration.
The controller is designed to drive single or
multiple CCFLs in Liquid Crystal Display (LCD)
applications.
OB3318 converts unregulated DC input voltage
to the pseudo sinusoidal voltage and current
waveforms in required frequency, to ignite and
operate CCFL lamps.
OB3318 provides a high degree of design
flexibility by offering great programmability for
key parameters which includes operating
frequency, striking frequency, striking time, burst
frequency for dimming and soft-start time.
OB3318 offers variable dimming controls. Both
internal burst and external low frequency PWM
(LPWM) dimming methods are available for a
wide range of dimming control (10% to 100%).
Further more, analog dimming is provided
through external DC input control to achieve 40%
to 100% dimming range.
The highly integrated OB3318 provides complete
protection features covering IC Under Voltage
Lockout (UVLO), System supply brownout
protection, Output Over Voltage Protection (OVP)
and Open-Lamp Protection.